diff options
213 files changed, 1164 insertions, 889 deletions
diff --git a/Documentation/vm/split_page_table_lock b/Documentation/vm/split_page_table_lock new file mode 100644 index 000000000000..7521d367f21d --- /dev/null +++ b/Documentation/vm/split_page_table_lock @@ -0,0 +1,94 @@ +Split page table lock +===================== + +Originally, mm->page_table_lock spinlock protected all page tables of the +mm_struct. But this approach leads to poor page fault scalability of +multi-threaded applications due high contention on the lock. To improve +scalability, split page table lock was introduced. + +With split page table lock we have separate per-table lock to serialize +access to the table. At the moment we use split lock for PTE and PMD +tables. Access to higher level tables protected by mm->page_table_lock. + +There are helpers to lock/unlock a table and other accessor functions: + - pte_offset_map_lock() + maps pte and takes PTE table lock, returns pointer to the taken + lock; + - pte_unmap_unlock() + unlocks and unmaps PTE table; + - pte_alloc_map_lock() + allocates PTE table if needed and take the lock, returns pointer + to taken lock or NULL if allocation failed; + - pte_lockptr() + returns pointer to PTE table lock; + - pmd_lock() + takes PMD table lock, returns pointer to taken lock; + - pmd_lockptr() + returns pointer to PMD table lock; + +Split page table lock for PTE tables is enabled compile-time if +CONFIG_SPLIT_PTLOCK_CPUS (usually 4) is less or equal to NR_CPUS. +If split lock is disabled, all tables guaded by mm->page_table_lock. + +Split page table lock for PMD tables is enabled, if it's enabled for PTE +tables and the architecture supports it (see below). + +Hugetlb and split page table lock +--------------------------------- + +Hugetlb can support several page sizes. We use split lock only for PMD +level, but not for PUD. + +Hugetlb-specific helpers: + - huge_pte_lock() + takes pmd split lock for PMD_SIZE page, mm->page_table_lock + otherwise; + - huge_pte_lockptr() + returns pointer to table lock; + +Support of split page table lock by an architecture +--------------------------------------------------- + +There's no need in special enabling of PTE split page table lock: +everything required is done by pgtable_page_ctor() and pgtable_page_dtor(), +which must be called on PTE table allocation / freeing. + +Make sure the architecture doesn't use slab allocator for page table +allocation: slab uses page->slab_cache and page->first_page for its pages. +These fields share storage with page->ptl. + +PMD split lock only makes sense if you have more than two page table +levels. + +PMD split lock enabling requires pgtable_pmd_page_ctor() call on PMD table +allocation and pgtable_pmd_page_dtor() on freeing. + +Allocation usually happens in pmd_alloc_one(), freeing in pmd_free(), but +make sure you cover all PMD table allocation / freeing paths: i.e X86_PAE +preallocate few PMDs on pgd_alloc(). + +With everything in place you can set CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK. + +NOTE: pgtable_page_ctor() and pgtable_pmd_page_ctor() can fail -- it must +be handled properly. + +page->ptl +--------- + +page->ptl is used to access split page table lock, where 'page' is struct +page of page containing the table. It shares storage with page->private +(and few other fields in union). + +To avoid increasing size of struct page and have best performance, we use a +trick: + - if spinlock_t fits into long, we use page->ptr as spinlock, so we + can avoid indirect access and save a cache line. + - if size of spinlock_t is bigger then size of long, we use page->ptl as + pointer to spinlock_t and allocate it dynamically. This allows to use + split lock with enabled DEBUG_SPINLOCK or DEBUG_LOCK_ALLOC, but costs + one more cache line for indirect access; + +The spinlock_t allocated in pgtable_page_ctor() for PTE table and in +pgtable_pmd_page_ctor() for PMD table. + +Please, never access page->ptl directly -- use appropriate helper. diff --git a/arch/Kconfig b/arch/Kconfig index ded747c7b74c..f1cf895c040f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -207,9 +207,6 @@ config HAVE_DMA_ATTRS config HAVE_DMA_CONTIGUOUS bool -config USE_GENERIC_SMP_HELPERS - bool - config GENERIC_SMP_IDLE_THREAD bool diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 35a300d4a9fb..8d2a4833acda 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -522,7 +522,6 @@ config ARCH_MAY_HAVE_PC_FDC config SMP bool "Symmetric multi-processing support" depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL - select USE_GENERIC_SMP_HELPERS ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/alpha/include/asm/pgalloc.h b/arch/alpha/include/asm/pgalloc.h index bc2a0daf2d92..aab14a019c20 100644 --- a/arch/alpha/include/asm/pgalloc.h +++ b/arch/alpha/include/asm/pgalloc.h @@ -72,7 +72,10 @@ pte_alloc_one(struct mm_struct *mm, unsigned long address) if (!pte) return NULL; page = virt_to_page(pte); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } return page; } diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 5ede5460c806..2ee0c9bfd032 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -125,7 +125,6 @@ config ARC_PLAT_NEEDS_CPU_TO_DMA config SMP bool "Symmetric Multi-Processing (Incomplete)" default n - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h index 36a9f20c21a3..81208bfd9dcb 100644 --- a/arch/arc/include/asm/pgalloc.h +++ b/arch/arc/include/asm/pgalloc.h @@ -105,11 +105,16 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { pgtable_t pte_pg; + struct page *page; pte_pg = __get_free_pages(GFP_KERNEL | __GFP_REPEAT, __get_order_pte()); - if (pte_pg) { - memzero((void *)pte_pg, PTRS_PER_PTE * 4); - pgtable_page_ctor(virt_to_page(pte_pg)); + if (!pte_pg) + return 0; + memzero((void *)pte_pg, PTRS_PER_PTE * 4); + page = virt_to_page(pte_pg); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return 0; } return pte_pg; diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 603d661b445d..00c1ff45a158 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1432,7 +1432,6 @@ config SMP depends on GENERIC_CLOCKEVENTS depends on HAVE_SMP depends on MMU || ARM_MPU - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/arm/include/asm/pgalloc.h b/arch/arm/include/asm/pgalloc.h index 943504f53f57..78a779361682 100644 --- a/arch/arm/include/asm/pgalloc.h +++ b/arch/arm/include/asm/pgalloc.h @@ -102,12 +102,14 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr) #else pte = alloc_pages(PGALLOC_GFP, 0); #endif - if (pte) { - if (!PageHighMem(pte)) - clean_pte_table(page_address(pte)); - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!PageHighMem(pte)) + clean_pte_table(page_address(pte)); + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; } - return pte; } diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c index d7aa52ea6cfc..bc471973cf04 100644 --- a/arch/arm/mach-tegra/apbio.c +++ b/arch/arm/mach-tegra/apbio.c @@ -114,7 +114,7 @@ static int do_dma_transfer(unsigned long apb_add, dma_desc->callback = apb_dma_complete; dma_desc->callback_param = NULL; - INIT_COMPLETION(tegra_apb_wait); + reinit_completion(&tegra_apb_wait); dmaengine_submit(dma_desc); dma_async_issue_pending(tegra_apb_dma_chan); diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c index 2a5907b5c8d2..ff379ac115df 100644 --- a/arch/arm/mm/fault-armv.c +++ b/arch/arm/mm/fault-armv.c @@ -65,7 +65,7 @@ static int do_adjust_pte(struct vm_area_struct *vma, unsigned long address, return ret; } -#if USE_SPLIT_PTLOCKS +#if USE_SPLIT_PTE_PTLOCKS /* * If we are using split PTE locks, then we need to take the page * lock here. Otherwise we are using shared mm->page_table_lock @@ -84,10 +84,10 @@ static inline void do_pte_unlock(spinlock_t *ptl) { spin_unlock(ptl); } -#else /* !USE_SPLIT_PTLOCKS */ +#else /* !USE_SPLIT_PTE_PTLOCKS */ static inline void do_pte_lock(spinlock_t *ptl) {} static inline void do_pte_unlock(spinlock_t *ptl) {} -#endif /* USE_SPLIT_PTLOCKS */ +#endif /* USE_SPLIT_PTE_PTLOCKS */ static int adjust_pte(struct vm_area_struct *vma, unsigned long address, unsigned long pfn) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index bb0bf1bfc05d..9714fe0403b7 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -143,7 +143,6 @@ config CPU_BIG_ENDIAN config SMP bool "Symmetric Multi-Processing" - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one CPU. If you say N here, the kernel will run on single and diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h index f214069ec5d5..9bea6e74a001 100644 --- a/arch/arm64/include/asm/pgalloc.h +++ b/arch/arm64/include/asm/pgalloc.h @@ -63,9 +63,12 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr) struct page *pte; pte = alloc_pages(PGALLOC_GFP, 0); - if (pte) - pgtable_page_ctor(pte); - + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/avr32/include/asm/pgalloc.h b/arch/avr32/include/asm/pgalloc.h index bc7e8ae479ee..1aba19d68c5e 100644 --- a/arch/avr32/include/asm/pgalloc.h +++ b/arch/avr32/include/asm/pgalloc.h @@ -68,7 +68,10 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, return NULL; page = virt_to_page(pg); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + quicklist_free(QUICK_PT, NULL, pg); + return NULL; + } return page; } diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index e887b57c3176..9ceccef9c649 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -34,7 +34,6 @@ config BLACKFIN select ARCH_WANT_IPC_PARSE_VERSION select GENERIC_ATOMIC64 select GENERIC_IRQ_PROBE - select USE_GENERIC_SMP_HELPERS if SMP select HAVE_NMI_WATCHDOG if NMI_WATCHDOG select GENERIC_SMP_IDLE_THREAD select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS diff --git a/arch/cris/include/asm/pgalloc.h b/arch/cris/include/asm/pgalloc.h index 6da975db112f..235ece437ddd 100644 --- a/arch/cris/include/asm/pgalloc.h +++ b/arch/cris/include/asm/pgalloc.h @@ -32,7 +32,12 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addres { struct page *pte; pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0); - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/frv/mm/pgalloc.c b/arch/frv/mm/pgalloc.c index f6084bc524e8..41907d25ed38 100644 --- a/arch/frv/mm/pgalloc.c +++ b/arch/frv/mm/pgalloc.c @@ -37,11 +37,15 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) #else page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); #endif - if (page) { - clear_highpage(page); - pgtable_page_ctor(page); - flush_dcache_page(page); + if (!page) + return NULL; + + clear_highpage(page); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; } + flush_dcache_page(page); return page; } diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 99041b07e610..09df2608f40a 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -4,7 +4,6 @@ comment "Linux Kernel Configuration for Hexagon" config HEXAGON def_bool y select HAVE_OPROFILE - select USE_GENERIC_SMP_HELPERS if SMP # Other pending projects/to-do items. # select HAVE_REGS_AND_STACK_ACCESS_API # select HAVE_HW_BREAKPOINT if PERF_EVENTS diff --git a/arch/hexagon/include/asm/pgalloc.h b/arch/hexagon/include/asm/pgalloc.h index 679bf6d66487..4c9d382d7798 100644 --- a/arch/hexagon/include/asm/pgalloc.h +++ b/arch/hexagon/include/asm/pgalloc.h @@ -65,10 +65,12 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, struct page *pte; pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); - - if (pte) - pgtable_page_ctor(pte); - + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 7740ab10a171..dfe85e92ca2e 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -343,7 +343,6 @@ config FORCE_MAX_ZONEORDER config SMP bool "Symmetric multi-processing support" - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one CPU. If you have a system with only one CPU, say N. If you have a system with more diff --git a/arch/ia64/include/asm/pgalloc.h b/arch/ia64/include/asm/pgalloc.h index 96a8d927db28..5767cdfc08db 100644 --- a/arch/ia64/include/asm/pgalloc.h +++ b/arch/ia64/include/asm/pgalloc.h @@ -91,7 +91,10 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr) if (!pg) return NULL; page = virt_to_page(pg); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + quicklist_free(0, NULL, pg); + return NULL; + } return page; } diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index 75661fbf4529..09ef94a8a7c3 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -275,7 +275,6 @@ source "kernel/Kconfig.preempt" config SMP bool "Symmetric multi-processing support" - select USE_GENERIC_SMP_HELPERS ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/m32r/include/asm/pgalloc.h b/arch/m32r/include/asm/pgalloc.h index 0fc736198979..2d55a064ccac 100644 --- a/arch/m32r/include/asm/pgalloc.h +++ b/arch/m32r/include/asm/pgalloc.h @@ -43,7 +43,12 @@ static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm, { struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO); - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/m68k/include/asm/mcf_pgalloc.h b/arch/m68k/include/asm/mcf_pgalloc.h index 313f3dd23cdc..f9924fbcfe42 100644 --- a/arch/m68k/include/asm/mcf_pgalloc.h +++ b/arch/m68k/include/asm/mcf_pgalloc.h @@ -56,6 +56,10 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, if (!page) return NULL; + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } pte = kmap(page); if (pte) { diff --git a/arch/m68k/include/asm/motorola_pgalloc.h b/arch/m68k/include/asm/motorola_pgalloc.h index 2f02f264e694..24bcba496c75 100644 --- a/arch/m68k/include/asm/motorola_pgalloc.h +++ b/arch/m68k/include/asm/motorola_pgalloc.h @@ -29,18 +29,22 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { - struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0); + struct page *page; pte_t *pte; + page = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0); if(!page) return NULL; + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } pte = kmap(page); __flush_page_to_ram(pte); flush_tlb_kernel_page(pte); nocache_page(pte); kunmap(page); - pgtable_page_ctor(page); return page; } diff --git a/arch/m68k/include/asm/sun3_pgalloc.h b/arch/m68k/include/asm/sun3_pgalloc.h index 48d80d5a666f..f868506e3350 100644 --- a/arch/m68k/include/asm/sun3_pgalloc.h +++ b/arch/m68k/include/asm/sun3_pgalloc.h @@ -59,7 +59,10 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, return NULL; clear_highpage(page); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } return page; } diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig index 36368eb07e13..e56abd2c1b4f 100644 --- a/arch/metag/Kconfig +++ b/arch/metag/Kconfig @@ -111,7 +111,6 @@ config METAG_META21 config SMP bool "Symmetric multi-processing support" depends on METAG_META21 && METAG_META21_MMU - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one thread running Linux. If you have a system with only one thread running Linux, diff --git a/arch/metag/include/asm/pgalloc.h b/arch/metag/include/asm/pgalloc.h index 275d9285141c..3104df0a4822 100644 --- a/arch/metag/include/asm/pgalloc.h +++ b/arch/metag/include/asm/pgalloc.h @@ -52,8 +52,12 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, { struct page *pte; pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); - if (pte) - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/microblaze/include/asm/pgalloc.h b/arch/microblaze/include/asm/pgalloc.h index ebd35792482c..7fdf7fabc7d7 100644 --- a/arch/microblaze/include/asm/pgalloc.h +++ b/arch/microblaze/include/asm/pgalloc.h @@ -122,8 +122,13 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, #endif ptepage = alloc_pages(flags, 0); - if (ptepage) - clear_highpage(ptepage); + if (!ptepage) + return NULL; + clear_highpage(ptepage); + if (!pgtable_page_ctor(ptepage)) { + __free_page(ptepage); + return NULL; + } return ptepage; } @@ -158,8 +163,9 @@ extern inline void pte_free_slow(struct page *ptepage) __free_page(ptepage); } -extern inline void pte_free(struct mm_struct *mm, struct page *ptepage) +static inline void pte_free(struct mm_struct *mm, struct page *ptepage) { + pgtable_page_dtor(ptepage); __free_page(ptepage); } diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 17cc7ff8458c..867d7db11581 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2125,7 +2125,6 @@ source "mm/Kconfig" config SMP bool "Multi-Processing support" depends on SYS_SUPPORTS_SMP - select USE_GENERIC_SMP_HELPERS help This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h index 881d18b4e298..b336037e8768 100644 --- a/arch/mips/include/asm/pgalloc.h +++ b/arch/mips/include/asm/pgalloc.h @@ -80,9 +80,12 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, struct page *pte; pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER); - if (pte) { - clear_highpage(pte); - pgtable_page_ctor(pte); + if (!pte) + return NULL; + clear_highpage(pte); + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; } return pte; } diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig index 6aaa1607001a..8bde9237d13b 100644 --- a/arch/mn10300/Kconfig +++ b/arch/mn10300/Kconfig @@ -181,7 +181,6 @@ endmenu config SMP bool "Symmetric multi-processing support" default y - select USE_GENERIC_SMP_HELPERS depends on MN10300_PROC_MN2WS0038 || MN10300_PROC_MN2WS0050 ---help--- This enables support for systems with more than one CPU. If you have diff --git a/arch/mn10300/include/asm/pgalloc.h b/arch/mn10300/include/asm/pgalloc.h index 146bacf193ea..0f25d5fa86f3 100644 --- a/arch/mn10300/include/asm/pgalloc.h +++ b/arch/mn10300/include/asm/pgalloc.h @@ -46,6 +46,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) static inline void pte_free(struct mm_struct *mm, struct page *pte) { + pgtable_page_dtor(pte); __free_page(pte); } diff --git a/arch/mn10300/mm/pgtable.c b/arch/mn10300/mm/pgtable.c index bd9ada693f95..e77a7c728081 100644 --- a/arch/mn10300/mm/pgtable.c +++ b/arch/mn10300/mm/pgtable.c @@ -78,8 +78,13 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) #else pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); #endif - if (pte) - clear_highpage(pte); + if (!pte) + return NULL; + clear_highpage(pte); + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/openrisc/include/asm/pgalloc.h b/arch/openrisc/include/asm/pgalloc.h index 05c39ecd2efd..21484e5b9e9a 100644 --- a/arch/openrisc/include/asm/pgalloc.h +++ b/arch/openrisc/include/asm/pgalloc.h @@ -78,8 +78,13 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, { struct page *pte; pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); - if (pte) - clear_page(page_address(pte)); + if (!pte) + return NULL; + clear_page(page_address(pte)); + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } @@ -90,6 +95,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) static inline void pte_free(struct mm_struct *mm, struct page *pte) { + pgtable_page_dtor(pte); __free_page(pte); } diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 7dcde539d61e..c03567a9a915 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -226,7 +226,6 @@ endchoice config SMP bool "Symmetric multi-processing support" - select USE_GENERIC_SMP_HELPERS ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index fc987a1c12a8..f213f5b4c423 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -121,8 +121,12 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) { struct page *page = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); - if (page) - pgtable_page_ctor(page); + if (!page) + return NULL; + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } return page; } diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 2f898d63eb96..4740b0a15fa8 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -106,7 +106,6 @@ config PPC select HAVE_MEMBLOCK_NODE_MAP select HAVE_DMA_ATTRS select HAVE_DMA_API_DEBUG - select USE_GENERIC_SMP_HELPERS if SMP select HAVE_OPROFILE select HAVE_DEBUG_KMEMLEAK select GENERIC_ATOMIC64 if PPC32 diff --git a/arch/powerpc/include/asm/pgalloc-64.h b/arch/powerpc/include/asm/pgalloc-64.h index f65e27b09bd3..16cb92d215d2 100644 --- a/arch/powerpc/include/asm/pgalloc-64.h +++ b/arch/powerpc/include/asm/pgalloc-64.h @@ -91,7 +91,10 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, if (!pte) return NULL; page = virt_to_page(pte); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } return page; } diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 6c856fb8c15b..5b9601715289 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -121,7 +121,10 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) ptepage = alloc_pages(flags, 0); if (!ptepage) return NULL; - pgtable_page_ctor(ptepage); + if (!pgtable_page_ctor(ptepage)) { + __free_page(ptepage); + return NULL; + } return ptepage; } diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 536eec72c0f7..9d95786aa80f 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -378,6 +378,10 @@ static pte_t *__alloc_for_cache(struct mm_struct *mm, int kernel) __GFP_REPEAT | __GFP_ZERO); if (!page) return NULL; + if (!kernel && !pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } ret = page_address(page); spin_lock(&mm->page_table_lock); @@ -392,9 +396,6 @@ static pte_t *__alloc_for_cache(struct mm_struct *mm, int kernel) } spin_unlock(&mm->page_table_lock); - if (!kernel) - pgtable_page_ctor(page); - return (pte_t *)ret; } diff --git a/arch/powerpc/platforms/powermac/low_i2c.c b/arch/powerpc/platforms/powermac/low_i2c.c index fc536f2971c0..7553b6a77c64 100644 --- a/arch/powerpc/platforms/powermac/low_i2c.c +++ b/arch/powerpc/platforms/powermac/low_i2c.c @@ -452,7 +452,7 @@ static int kw_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, */ if (use_irq) { /* Clear completion */ - INIT_COMPLETION(host->complete); + reinit_completion(&host->complete); /* Ack stale interrupts */ kw_write_reg(reg_isr, kw_read_reg(reg_isr)); /* Arm timeout */ @@ -717,7 +717,7 @@ static int pmu_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, return -EINVAL; } - INIT_COMPLETION(comp); + reinit_completion(&comp); req->data[0] = PMU_I2C_CMD; req->reply[0] = 0xff; req->nbytes = sizeof(struct pmu_i2c_hdr) + 1; @@ -748,7 +748,7 @@ static int pmu_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, hdr->bus = PMU_I2C_BUS_STATUS; - INIT_COMPLETION(comp); + reinit_completion(&comp); req->data[0] = PMU_I2C_CMD; req->reply[0] = 0xff; req->nbytes = 2; diff --git a/arch/powerpc/platforms/pseries/suspend.c b/arch/powerpc/platforms/pseries/suspend.c index 5f997e79d570..16a255255d30 100644 --- a/arch/powerpc/platforms/pseries/suspend.c +++ b/arch/powerpc/platforms/pseries/suspend.c @@ -106,7 +106,7 @@ static int pseries_prepare_late(void) atomic_set(&suspend_data.done, 0); atomic_set(&suspend_data.error, 0); suspend_data.complete = &suspend_work; - INIT_COMPLETION(suspend_work); + reinit_completion(&suspend_work); return 0; } diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index f75d7e517927..314fced4fc14 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -141,7 +141,6 @@ config S390 select OLD_SIGACTION select OLD_SIGSUSPEND3 select SYSCTL_EXCEPTION_TRACE - select USE_GENERIC_SMP_HELPERS if SMP select VIRT_CPU_ACCOUNTING select VIRT_TO_BUS diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 0a2e5e086749..e794c88f699a 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -772,7 +772,11 @@ static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm, __free_page(page); return NULL; } - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + kfree(mp); + __free_page(page); + return NULL; + } mp->vmaddr = vmaddr & PMD_MASK; INIT_LIST_HEAD(&mp->mapper); page->index = (unsigned long) mp; @@ -902,7 +906,10 @@ unsigned long *page_table_alloc(struct mm_struct *mm, unsigned long vmaddr) page = alloc_page(GFP_KERNEL|__GFP_REPEAT); if (!page) return NULL; - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } atomic_set(&page->_mapcount, 1); table = (unsigned long *) page_to_phys(page); clear_table(table, _PAGE_INVALID, PAGE_SIZE); @@ -1244,11 +1251,11 @@ void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, assert_spin_locked(&mm->page_table_lock); /* FIFO */ - if (!mm->pmd_huge_pte) + if (!pmd_huge_pte(mm, pmdp)) INIT_LIST_HEAD(lh); else - list_add(lh, (struct list_head *) mm->pmd_huge_pte); - mm->pmd_huge_pte = pgtable; + list_add(lh, (struct list_head *) pmd_huge_pte(mm, pmdp)); + pmd_huge_pte(mm, pmdp) = pgtable; } pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp) @@ -1260,12 +1267,12 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp) assert_spin_locked(&mm->page_table_lock); /* FIFO */ - pgtable = mm->pmd_huge_pte; + pgtable = pmd_huge_pte(mm, pmdp); lh = (struct list_head *) pgtable; if (list_empty(lh)) - mm->pmd_huge_pte = NULL; + pmd_huge_pte(mm, pmdp) = NULL; else { - mm->pmd_huge_pte = (pgtable_t) lh->next; + pmd_huge_pte(mm, pmdp) = (pgtable_t) lh->next; list_del(lh); } ptep = (pte_t *) pgtable; diff --git a/arch/score/include/asm/pgalloc.h b/arch/score/include/asm/pgalloc.h index 716b3fd1d863..2e067657db98 100644 --- a/arch/score/include/asm/pgalloc.h +++ b/arch/score/include/asm/pgalloc.h @@ -54,9 +54,12 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, struct page *pte; pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER); - if (pte) { - clear_highpage(pte); - pgtable_page_ctor(pte); + if (!pte) + return NULL; + clear_highpage(pte); + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; } return pte; } diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 224f4bc9925e..e78561bc30ef 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -711,7 +711,6 @@ config CC_STACKPROTECTOR config SMP bool "Symmetric multi-processing support" depends on SYS_SUPPORTS_SMP - select USE_GENERIC_SMP_HELPERS ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h index 8c00785c60d5..a33673b3687d 100644 --- a/arch/sh/include/asm/pgalloc.h +++ b/arch/sh/include/asm/pgalloc.h @@ -47,7 +47,10 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, if (!pg) return NULL; page = virt_to_page(pg); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + quicklist_free(QUICK_PT, NULL, pg); + return NULL; + } return page; } diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 78c4fdb91bc5..8591b201d9cc 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -28,7 +28,6 @@ config SPARC select HAVE_ARCH_JUMP_LABEL select GENERIC_IRQ_SHOW select ARCH_WANT_IPC_PARSE_VERSION - select USE_GENERIC_SMP_HELPERS if SMP select GENERIC_PCI_IOMAP select HAVE_NMI_WATCHDOG if SPARC64 select HAVE_BPF_JIT diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index ed82edad1a39..d6de9353ee11 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -2519,12 +2519,13 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, return pte; page = __alloc_for_cache(mm); - if (page) { - pgtable_page_ctor(page); - pte = (pte_t *) page_address(page); + if (!page) + return NULL; + if (!pgtable_page_ctor(page)) { + free_hot_cold_page(page, 0); + return NULL; } - - return pte; + return (pte_t *) page_address(page); } void pte_free_kernel(struct mm_struct *mm, pte_t *pte) diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index 5d721df48a72..869023abe5a4 100644 --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -345,7 +345,10 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) if ((pte = (unsigned long)pte_alloc_one_kernel(mm, address)) == 0) return NULL; page = pfn_to_page(__nocache_pa(pte) >> PAGE_SHIFT); - pgtable_page_ctor(page); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } return page; } diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c index 7a91f288c708..656cc46a81f5 100644 --- a/arch/sparc/mm/tlb.c +++ b/arch/sparc/mm/tlb.c @@ -196,11 +196,11 @@ void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, assert_spin_locked(&mm->page_table_lock); /* FIFO */ - if (!mm->pmd_huge_pte) + if (!pmd_huge_pte(mm, pmdp)) INIT_LIST_HEAD(lh); else - list_add(lh, (struct list_head *) mm->pmd_huge_pte); - mm->pmd_huge_pte = pgtable; + list_add(lh, (struct list_head *) pmd_huge_pte(mm, pmdp)); + pmd_huge_pte(mm, pmdp) = pgtable; } pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp) @@ -211,12 +211,12 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp) assert_spin_locked(&mm->page_table_lock); /* FIFO */ - pgtable = mm->pmd_huge_pte; + pgtable = pmd_huge_pte(mm, pmdp); lh = (struct list_head *) pgtable; if (list_empty(lh)) - mm->pmd_huge_pte = NULL; + pmd_huge_pte(mm, pmdp) = NULL; else { - mm->pmd_huge_pte = (pgtable_t) lh->next; + pmd_huge_pte(mm, pmdp) = (pgtable_t) lh->next; list_del(lh); } pte_val(pgtable[0]) = 0; diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index d45a2c48f185..b3692ce78f90 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -8,7 +8,6 @@ config TILE select HAVE_KVM if !TILEGX select GENERIC_FIND_FIRST_BIT select SYSCTL_EXCEPTION_TRACE - select USE_GENERIC_SMP_HELPERS select CC_OPTIMIZE_FOR_SIZE select HAVE_DEBUG_KMEMLEAK select GENERIC_IRQ_PROBE diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c index 4fd9ec0b58ed..5e86eac4bfae 100644 --- a/arch/tile/mm/pgtable.c +++ b/arch/tile/mm/pgtable.c @@ -241,6 +241,11 @@ struct page *pgtable_alloc_one(struct mm_struct *mm, unsigned long address, if (p == NULL) return NULL; + if (!pgtable_page_ctor(p)) { + __free_pages(p, L2_USER_PGTABLE_ORDER); + return NULL; + } + /* * Make every page have a page_count() of one, not just the first. * We don't use __GFP_COMP since it doesn't look like it works @@ -251,7 +256,6 @@ struct page *pgtable_alloc_one(struct mm_struct *mm, unsigned long address, inc_zone_page_state(p+i, NR_PAGETABLE); } - pgtable_page_ctor(p); return p; } diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c index 7ddb64baf327..8636e905426f 100644 --- a/arch/um/kernel/mem.c +++ b/arch/um/kernel/mem.c @@ -279,8 +279,12 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) struct page *pte; pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); - if (pte) - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/unicore32/include/asm/pgalloc.h b/arch/unicore32/include/asm/pgalloc.h index 0213e373a895..2e02d1356fdf 100644 --- a/arch/unicore32/include/asm/pgalloc.h +++ b/arch/unicore32/include/asm/pgalloc.h @@ -51,12 +51,14 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr) struct page *pte; pte = alloc_pages(PGALLOC_GFP, 0); - if (pte) { - if (!PageHighMem(pte)) { - void *page = page_address(pte); - clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t)); - } - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!PageHighMem(pte)) { + void *page = page_address(pte); + clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t)); + } + if (!pgtable_page_ctor(pte)) { + __free_page(pte); } return pte; diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6e3e1cb3f6a0..83f521aa103f 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -90,7 +90,6 @@ config X86 select GENERIC_IRQ_SHOW select GENERIC_CLOCKEVENTS_MIN_ADJUST select IRQ_FORCED_THREADING - select USE_GENERIC_SMP_HELPERS if SMP select HAVE_BPF_JIT if X86_64 select HAVE_ARCH_TRANSPARENT_HUGEPAGE select CLKEVT_I8253 @@ -1885,6 +1884,10 @@ config USE_PERCPU_NUMA_NODE_ID def_bool y depends on NUMA +config ARCH_ENABLE_SPLIT_PMD_PTLOCK + def_bool y + depends on X86_64 || X86_PAE + menu "Power management and ACPI options" config ARCH_HIBERNATION_HEADER diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index b4389a468fb6..c4412e972bbd 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -80,12 +80,21 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, #if PAGETABLE_LEVELS > 2 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { - return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); + struct page *page; + page = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0); + if (!page) + return NULL; + if (!pgtable_pmd_page_ctor(page)) { + __free_pages(page, 0); + return NULL; + } + return (pmd_t *)page_address(page); } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) { BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); + pgtable_pmd_page_dtor(virt_to_page(pmd)); free_page((unsigned long)pmd); } diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index dfa537a03be1..a7cccb6d7fec 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -25,8 +25,12 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address) struct page *pte; pte = alloc_pages(__userpte_alloc_gfp, 0); - if (pte) - pgtable_page_ctor(pte); + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } @@ -189,8 +193,10 @@ static void free_pmds(pmd_t *pmds[]) int i; for(i = 0; i < PREALLOCATED_PMDS; i++) - if (pmds[i]) + if (pmds[i]) { + pgtable_pmd_page_dtor(virt_to_page(pmds[i])); free_page((unsigned long)pmds[i]); + } } static int preallocate_pmds(pmd_t *pmds[]) @@ -200,8 +206,13 @@ static int preallocate_pmds(pmd_t *pmds[]) for(i = 0; i < PREALLOCATED_PMDS; i++) { pmd_t *pmd = (pmd_t *)__get_free_page(PGALLOC_GFP); - if (pmd == NULL) + if (!pmd) failed = true; + if (pmd && !pgtable_pmd_page_ctor(virt_to_page(pmd))) { + free_page((unsigned long)pmds[i]); + pmd = NULL; + failed = true; + } pmds[i] = pmd; } diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index fdc3ba28ca38..49c962fe7e62 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -796,8 +796,8 @@ static spinlock_t *xen_pte_lock(struct page *page, struct mm_struct *mm) { spinlock_t *ptl = NULL; -#if USE_SPLIT_PTLOCKS - ptl = __pte_lockptr(page); +#if USE_SPLIT_PTE_PTLOCKS + ptl = ptlock_ptr(page); spin_lock_nest_lock(ptl, &mm->page_table_lock); #endif @@ -1637,7 +1637,7 @@ static inline void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, __set_pfn_prot(pfn, PAGE_KERNEL_RO); - if (level == PT_PTE && USE_SPLIT_PTLOCKS) + if (level == PT_PTE && USE_SPLIT_PTE_PTLOCKS) __pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn); xen_mc_issue(PARAVIRT_LAZY_MMU); @@ -1671,7 +1671,7 @@ static inline void xen_release_ptpage(unsigned long pfn, unsigned level) if (!PageHighMem(page)) { xen_mc_batch(); - if (level == PT_PTE && USE_SPLIT_PTLOCKS) + if (level == PT_PTE && USE_SPLIT_PTE_PTLOCKS) __pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn); __set_pfn_prot(pfn, PAGE_KERNEL); diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h index cf914c8c249a..d38eb9237e64 100644 --- a/arch/xtensa/include/asm/pgalloc.h +++ b/arch/xtensa/include/asm/pgalloc.h @@ -38,35 +38,46 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) free_page((unsigned long)pgd); } -/* Use a slab cache for the pte pages (see also sparc64 implementation) */ - -extern struct kmem_cache *pgtable_cache; - static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { - return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT); + pte_t *ptep; + int i; + + ptep = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT); + if (!ptep) + return NULL; + for (i = 0; i < 1024; i++) + pte_clear(NULL, 0, ptep + i); + return ptep; } static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr) { + pte_t *pte; struct page *page; - page = virt_to_page(pte_alloc_one_kernel(mm, addr)); - pgtable_page_ctor(page); + pte = pte_alloc_one_kernel(mm, addr); + if (!pte) + return NULL; + page = virt_to_page(pte); + if (!pgtable_page_ctor(page)) { + __free_page(page); + return NULL; + } return page; } static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { - kmem_cache_free(pgtable_cache, pte); + free_page((unsigned long)pte); } static inline void pte_free(struct mm_struct *mm, pgtable_t pte) { pgtable_page_dtor(pte); - kmem_cache_free(pgtable_cache, page_address(pte)); + __free_page(pte); } #define pmd_pgtable(pmd) pmd_page(pmd) diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h index 0fdf5d043f82..216446295ada 100644 --- a/arch/xtensa/include/asm/pgtable.h +++ b/arch/xtensa/include/asm/pgtable.h @@ -220,12 +220,11 @@ extern unsigned long empty_zero_page[1024]; #ifdef CONFIG_MMU extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)]; extern void paging_init(void); -extern void pgtable_cache_init(void); #else # define swapper_pg_dir NULL static inline void paging_init(void) { } -static inline void pgtable_cache_init(void) { } #endif +static inline void pgtable_cache_init(void) { } /* * The pmd contains the kernel virtual address of the pte page. diff --git a/arch/xtensa/mm/mmu.c b/arch/xtensa/mm/mmu.c index a1077570e383..c43771c974be 100644 --- a/arch/xtensa/mm/mmu.c +++ b/arch/xtensa/mm/mmu.c @@ -50,23 +50,3 @@ void __init init_mmu(void) */ set_ptevaddr_register(PGTABLE_START); } - -struct kmem_cache *pgtable_cache __read_mostly; - -static void pgd_ctor(void *addr) -{ - pte_t *ptep = (pte_t *)addr; - int i; - - for (i = 0; i < 1024; i++, ptep++) - pte_clear(NULL, 0, ptep); - -} - -void __init pgtable_cache_init(void) -{ - pgtable_cache = kmem_cache_create("pgd", - PAGE_SIZE, PAGE_SIZE, - SLAB_HWCACHE_ALIGN, - pgd_ctor); -} diff --git a/block/blk-mq.c b/block/blk-mq.c index 88d4e864d4c0..c661896e2465 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -319,7 +319,7 @@ void __blk_mq_end_io(struct request *rq, int error) blk_mq_complete_request(rq, error); } -#if defined(CONFIG_SMP) && defined(CONFIG_USE_GENERIC_SMP_HELPERS) +#if defined(CONFIG_SMP) /* * Called with interrupts disabled. @@ -361,7 +361,7 @@ static int ipi_remote_cpu(struct blk_mq_ctx *ctx, const int cpu, return true; } -#else /* CONFIG_SMP && CONFIG_USE_GENERIC_SMP_HELPERS */ +#else /* CONFIG_SMP */ static int ipi_remote_cpu(struct blk_mq_ctx *ctx, const int cpu, struct request *rq, const int error) { diff --git a/block/blk-softirq.c b/block/blk-softirq.c index ce4b8bfd3d27..57790c1a97eb 100644 --- a/block/blk-softirq.c +++ b/block/blk-softirq.c @@ -36,7 +36,7 @@ static void blk_done_softirq(struct softirq_action *h) } } -#if defined(CONFIG_SMP) && defined(CONFIG_USE_GENERIC_SMP_HELPERS) +#ifdef CONFIG_SMP static void trigger_softirq(void *data) { struct request *rq = data; @@ -71,7 +71,7 @@ static int raise_blk_irq(int cpu, struct request *rq) return 1; } -#else /* CONFIG_SMP && CONFIG_USE_GENERIC_SMP_HELPERS */ +#else /* CONFIG_SMP */ static int raise_blk_irq(int cpu, struct request *rq) { return 1; diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 4f8c4d90ec73..97779522472f 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -288,7 +288,7 @@ static ssize_t queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count) { ssize_t ret = -EINVAL; -#if defined(CONFIG_USE_GENERIC_SMP_HELPERS) +#ifdef CONFIG_SMP unsigned long val; ret = queue_var_store(&val, page, count); diff --git a/crypto/af_alg.c b/crypto/af_alg.c index ac33d5f30778..966f893711b3 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -434,7 +434,7 @@ int af_alg_wait_for_completion(int err, struct af_alg_completion *completion) case -EINPROGRESS: case -EBUSY: wait_for_completion(&completion->completion); - INIT_COMPLETION(completion->completion); + reinit_completion(&completion->completion); err = completion->err; break; }; diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c index 25a5934f0e50..1ab8258fcf56 100644 --- a/crypto/tcrypt.c +++ b/crypto/tcrypt.c @@ -493,7 +493,7 @@ static inline int do_one_ahash_op(struct ahash_request *req, int ret) ret = wait_for_completion_interruptible(&tr->completion); if (!ret) ret = tr->err; - INIT_COMPLETION(tr->completion); + reinit_completion(&tr->completion); } return ret; } @@ -721,7 +721,7 @@ static inline int do_one_acipher_op(struct ablkcipher_request *req, int ret) ret = wait_for_completion_interruptible(&tr->completion); if (!ret) ret = tr->err; - INIT_COMPLETION(tr->completion); + reinit_completion(&tr->completion); } return ret; diff --git a/crypto/testmgr.c b/crypto/testmgr.c index e091ef6e1791..432afc03e7c3 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -179,7 +179,7 @@ static int do_one_async_hash_op(struct ahash_request *req, ret = wait_for_completion_interruptible(&tr->completion); if (!ret) ret = tr->err; - INIT_COMPLETION(tr->completion); + reinit_completion(&tr->completion); } return ret; } @@ -336,7 +336,7 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template, ret = wait_for_completion_interruptible( &tresult.completion); if (!ret && !(ret = tresult.err)) { - INIT_COMPLETION(tresult.completion); + reinit_completion(&tresult.completion); break; } /* fall through */ @@ -543,7 +543,7 @@ static int __test_aead(struct crypto_aead *tfm, int enc, ret = wait_for_completion_interruptible( &result.completion); if (!ret && !(ret = result.err)) { - INIT_COMPLETION(result.completion); + reinit_completion(&result.completion); break; } case -EBADMSG: @@ -697,7 +697,7 @@ static int __test_aead(struct crypto_aead *tfm, int enc, ret = wait_for_completion_interruptible( &result.completion); if (!ret && !(ret = result.err)) { - INIT_COMPLETION(result.completion); + reinit_completion(&result.completion); break; } case -EBADMSG: @@ -983,7 +983,7 @@ static int __test_skcipher(struct crypto_ablkcipher *tfm, int enc, ret = wait_for_completion_interruptible( &result.completion); if (!ret && !((ret = result.err))) { - INIT_COMPLETION(result.completion); + reinit_completion(&result.completion); break; } /* fall through */ @@ -1086,7 +1086,7 @@ static int __test_skcipher(struct crypto_ablkcipher *tfm, int enc, ret = wait_for_completion_interruptible( &result.completion); if (!ret && !((ret = result.err))) { - INIT_COMPLETION(result.completion); + reinit_completion(&result.completion); break; } /* fall through */ diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 77bbc8266883..92d7797223be 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -3017,7 +3017,7 @@ static inline void ata_eh_pull_park_action(struct ata_port *ap) * ourselves at the beginning of each pass over the loop. * * Additionally, all write accesses to &ap->park_req_pending - * through INIT_COMPLETION() (see below) or complete_all() + * through reinit_completion() (see below) or complete_all() * (see ata_scsi_park_store()) are protected by the host lock. * As a result we have that park_req_pending.done is zero on * exit from this function, i.e. when ATA_EH_PARK actions for @@ -3031,7 +3031,7 @@ static inline void ata_eh_pull_park_action(struct ata_port *ap) */ spin_lock_irqsave(ap->lock, flags); - INIT_COMPLETION(ap->park_req_pending); + reinit_completion(&ap->park_req_pending); ata_for_each_link(link, ap, EDGE) { ata_for_each_dev(dev, link, ALL) { struct ata_eh_info *ehi = &link->eh_info; diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index ee039afe9078..c12e9b9556be 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -757,7 +757,7 @@ void dpm_resume(pm_message_t state) async_error = 0; list_for_each_entry(dev, &dpm_suspended_list, power.entry) { - INIT_COMPLETION(dev->power.completion); + reinit_completion(&dev->power.completion); if (is_async(dev)) { get_device(dev); async_schedule(async_resume, dev); @@ -1237,7 +1237,7 @@ static void async_suspend(void *data, async_cookie_t cookie) static int device_suspend(struct device *dev) { - INIT_COMPLETION(dev->power.completion); + reinit_completion(&dev->power.completion); if (pm_async_enabled && dev->power.async_suspend) { get_device(dev); diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c index 4ff85b8785ee..748dea4f34dc 100644 --- a/drivers/block/amiflop.c +++ b/drivers/block/amiflop.c @@ -343,7 +343,7 @@ static int fd_motor_on(int nr) unit[nr].motor = 1; fd_select(nr); - INIT_COMPLETION(motor_on_completion); + reinit_completion(&motor_on_completion); motor_on_timer.data = nr; mod_timer(&motor_on_timer, jiffies + HZ/2); diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 0c004ac05811..b35fc4f5237c 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -2808,7 +2808,7 @@ resend_cmd2: /* erase the old error information */ memset(c->err_info, 0, sizeof(ErrorInfo_struct)); return_status = IO_OK; - INIT_COMPLETION(wait); + reinit_completion(&wait); goto resend_cmd2; } @@ -3669,7 +3669,7 @@ static int add_to_scan_list(struct ctlr_info *h) } } if (!found && !h->busy_scanning) { - INIT_COMPLETION(h->scan_wait); + reinit_completion(&h->scan_wait); list_add_tail(&h->scan_list, &scan_q); ret = 1; } diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c index d2120ba8f3f9..73ce739f8e19 100644 --- a/drivers/char/hw_random/timeriomem-rng.c +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -79,7 +79,7 @@ static int timeriomem_rng_data_read(struct hwrng *rng, u32 *data) priv->expires = cur + delay; priv->present = 0; - INIT_COMPLETION(priv->completion); + reinit_completion(&priv->completion); mod_timer(&priv->timer, priv->expires); return 4; diff --git a/drivers/crypto/tegra-aes.c b/drivers/crypto/tegra-aes.c index 2d58da972ae2..fa05e3c329bd 100644 --- a/drivers/crypto/tegra-aes.c +++ b/drivers/crypto/tegra-aes.c @@ -268,7 +268,7 @@ static int aes_start_crypt(struct tegra_aes_dev *dd, u32 in_addr, u32 out_addr, aes_writel(dd, value, TEGRA_AES_SECURE_INPUT_SELECT); aes_writel(dd, out_addr, TEGRA_AES_SECURE_DEST_ADDR); - INIT_COMPLETION(dd->op_complete); + reinit_completion(&dd->op_complete); for (i = 0; i < AES_HW_MAX_ICQ_LENGTH - 1; i++) { do { diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c index e5af0e3a26ec..0e799516a2ab 100644 --- a/drivers/firewire/core-transaction.c +++ b/drivers/firewire/core-transaction.c @@ -477,7 +477,7 @@ void fw_send_phy_config(struct fw_card *card, phy_config_packet.header[1] = data; phy_config_packet.header[2] = ~data; phy_config_packet.generation = generation; - INIT_COMPLETION(phy_config_done); + reinit_completion(&phy_config_done); card->driver->send_request(card, &phy_config_packet); wait_for_completion_timeout(&phy_config_done, timeout); diff --git a/drivers/gpu/drm/drm_flip_work.c b/drivers/gpu/drm/drm_flip_work.c index e788882d9021..f9c7fa3d0012 100644 --- a/drivers/gpu/drm/drm_flip_work.c +++ b/drivers/gpu/drm/drm_flip_work.c @@ -34,7 +34,7 @@ */ void drm_flip_work_queue(struct drm_flip_work *work, void *val) { - if (kfifo_put(&work->fifo, (const void **)&val)) { + if (kfifo_put(&work->fifo, val)) { atomic_inc(&work->pending); } else { DRM_ERROR("%s fifo full!\n", work->name); diff --git a/drivers/gpu/drm/gma500/oaktrail_hdmi_i2c.c b/drivers/gpu/drm/gma500/oaktrail_hdmi_i2c.c index 1eb86c79523e..e28107061148 100644 --- a/drivers/gpu/drm/gma500/oaktrail_hdmi_i2c.c +++ b/drivers/gpu/drm/gma500/oaktrail_hdmi_i2c.c @@ -99,7 +99,7 @@ static int xfer_read(struct i2c_adapter *adap, struct i2c_msg *pmsg) i2c_dev->status = I2C_STAT_INIT; i2c_dev->msg = pmsg; i2c_dev->buf_offset = 0; - INIT_COMPLETION(i2c_dev->complete); + reinit_completion(&i2c_dev->complete); /* Enable I2C transaction */ temp = ((pmsg->len) << 20) | HI2C_EDID_READ | HI2C_ENABLE_TRANSACTION; diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h index 75db0c400037..cfa63b0825b0 100644 --- a/drivers/hid/hid-wiimote.h +++ b/drivers/hid/hid-wiimote.h @@ -327,7 +327,7 @@ static inline void wiimote_cmd_acquire_noint(struct wiimote_data *wdata) static inline void wiimote_cmd_set(struct wiimote_data *wdata, int cmd, __u32 opt) { - INIT_COMPLETION(wdata->state.ready); + reinit_completion(&wdata->state.ready); wdata->state.cmd = cmd; wdata->state.opt = opt; } diff --git a/drivers/hwmon/jz4740-hwmon.c b/drivers/hwmon/jz4740-hwmon.c index e0d66b9590ab..a183e488db78 100644 --- a/drivers/hwmon/jz4740-hwmon.c +++ b/drivers/hwmon/jz4740-hwmon.c @@ -66,7 +66,7 @@ static ssize_t jz4740_hwmon_read_adcin(struct device *dev, mutex_lock(&hwmon->lock); - INIT_COMPLETION(*completion); + reinit_completion(completion); enable_irq(hwmon->irq); hwmon->cell->enable(to_platform_device(dev)); diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index fd059308affa..8edba9de76df 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -371,7 +371,7 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) dev_dbg(dev->dev, "transfer: %s %d bytes.\n", (dev->msg->flags & I2C_M_RD) ? "read" : "write", dev->buf_len); - INIT_COMPLETION(dev->cmd_complete); + reinit_completion(&dev->cmd_complete); dev->transfer_status = 0; if (!dev->buf_len) { diff --git a/drivers/i2c/busses/i2c-bcm2835.c b/drivers/i2c/busses/i2c-bcm2835.c index ea4b08fc3353..d7e8600f31fb 100644 --- a/drivers/i2c/busses/i2c-bcm2835.c +++ b/drivers/i2c/busses/i2c-bcm2835.c @@ -151,7 +151,7 @@ static int bcm2835_i2c_xfer_msg(struct bcm2835_i2c_dev *i2c_dev, i2c_dev->msg_buf = msg->buf; i2c_dev->msg_buf_remaining = msg->len; - INIT_COMPLETION(i2c_dev->completion); + reinit_completion(&i2c_dev->completion); bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, BCM2835_I2C_C_CLEAR); diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index 132369fad4e0..960dec61c64e 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -323,7 +323,7 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop) davinci_i2c_write_reg(dev, DAVINCI_I2C_CNT_REG, dev->buf_len); - INIT_COMPLETION(dev->cmd_complete); + reinit_completion(&dev->cmd_complete); dev->cmd_err = 0; /* Take I2C out of reset and configure it as master */ diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index 5888feef1ac5..e89e3e2145e5 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -613,7 +613,7 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) mutex_lock(&dev->lock); pm_runtime_get_sync(dev->dev); - INIT_COMPLETION(dev->cmd_complete); + reinit_completion(&dev->cmd_complete); dev->msgs = msgs; dev->msgs_num = num; dev->cmd_err = 0; diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c index 1672effbcebb..0043ede234c2 100644 --- a/drivers/i2c/busses/i2c-ismt.c +++ b/drivers/i2c/busses/i2c-ismt.c @@ -541,7 +541,7 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr, desc->dptr_high = upper_32_bits(dma_addr); } - INIT_COMPLETION(priv->cmp); + reinit_completion(&priv->cmp); /* Add the descriptor */ ismt_submit_desc(priv); diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c index b7c857774708..3aedd86a6468 100644 --- a/drivers/i2c/busses/i2c-mxs.c +++ b/drivers/i2c/busses/i2c-mxs.c @@ -505,7 +505,7 @@ static int mxs_i2c_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, return err; } } else { - INIT_COMPLETION(i2c->cmd_complete); + reinit_completion(&i2c->cmd_complete); ret = mxs_i2c_dma_setup_xfer(adap, msg, flags); if (ret) return ret; diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 9967a6f9c2ff..a6a891d7970d 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -543,7 +543,7 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, w |= OMAP_I2C_BUF_RXFIF_CLR | OMAP_I2C_BUF_TXFIF_CLR; omap_i2c_write_reg(dev, OMAP_I2C_BUF_REG, w); - INIT_COMPLETION(dev->cmd_complete); + reinit_completion(&dev->cmd_complete); dev->cmd_err = 0; w = OMAP_I2C_CON_EN | OMAP_I2C_CON_MST | OMAP_I2C_CON_STT; diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index c457cb447c66..e661edee4d0c 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -544,7 +544,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, i2c_dev->msg_buf_remaining = msg->len; i2c_dev->msg_err = I2C_ERR_NONE; i2c_dev->msg_read = (msg->flags & I2C_M_RD); - INIT_COMPLETION(i2c_dev->msg_complete); + reinit_completion(&i2c_dev->msg_complete); packet_header = (0 << PACKET_HEADER0_HEADER_SIZE_SHIFT) | PACKET_HEADER0_PROTOCOL_I2C | diff --git a/drivers/i2c/busses/i2c-wmt.c b/drivers/i2c/busses/i2c-wmt.c index c65da3d913a0..31395fa8121d 100644 --- a/drivers/i2c/busses/i2c-wmt.c +++ b/drivers/i2c/busses/i2c-wmt.c @@ -158,7 +158,7 @@ static int wmt_i2c_write(struct i2c_adapter *adap, struct i2c_msg *pmsg, writew(val, i2c_dev->base + REG_CR); } - INIT_COMPLETION(i2c_dev->complete); + reinit_completion(&i2c_dev->complete); if (i2c_dev->mode == I2C_MODE_STANDARD) tcr_val = TCR_STANDARD_MODE; @@ -247,7 +247,7 @@ static int wmt_i2c_read(struct i2c_adapter *adap, struct i2c_msg *pmsg, writew(val, i2c_dev->base + REG_CR); } - INIT_COMPLETION(i2c_dev->complete); + reinit_completion(&i2c_dev->complete); if (i2c_dev->mode == I2C_MODE_STANDARD) tcr_val = TCR_STANDARD_MODE; diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c index e6fbd3e70981..9a4e0e32a771 100644 --- a/drivers/iio/adc/ad_sigma_delta.c +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -188,7 +188,7 @@ static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, spi_bus_lock(sigma_delta->spi->master); sigma_delta->bus_locked = true; - INIT_COMPLETION(sigma_delta->completion); + reinit_completion(&sigma_delta->completion); ret = ad_sigma_delta_set_mode(sigma_delta, mode); if (ret < 0) @@ -259,7 +259,7 @@ int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, spi_bus_lock(sigma_delta->spi->master); sigma_delta->bus_locked = true; - INIT_COMPLETION(sigma_delta->completion); + reinit_completion(&sigma_delta->completion); ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_SINGLE); @@ -343,7 +343,7 @@ static int ad_sd_buffer_postdisable(struct iio_dev *indio_dev) { struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); - INIT_COMPLETION(sigma_delta->completion); + reinit_completion(&sigma_delta->completion); wait_for_completion_timeout(&sigma_delta->completion, HZ); if (!sigma_delta->irq_dis) { diff --git a/drivers/iio/adc/nau7802.c b/drivers/iio/adc/nau7802.c index 54c5babe6746..e525aa6475c4 100644 --- a/drivers/iio/adc/nau7802.c +++ b/drivers/iio/adc/nau7802.c @@ -190,7 +190,7 @@ static int nau7802_read_irq(struct iio_dev *indio_dev, struct nau7802_state *st = iio_priv(indio_dev); int ret; - INIT_COMPLETION(st->value_ok); + reinit_completion(&st->value_ok); enable_irq(st->client->irq); nau7802_sync(st); diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index dac15b9f9df8..c10eab64bc05 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -56,7 +56,7 @@ int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp) ev.id = ev_code; ev.timestamp = timestamp; - copied = kfifo_put(&ev_int->det_events, &ev); + copied = kfifo_put(&ev_int->det_events, ev); if (copied != 0) wake_up_locked_poll(&ev_int->wait, POLLIN); } diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c index d53e0b72a407..4204841cdc49 100644 --- a/drivers/input/touchscreen/cyttsp_core.c +++ b/drivers/input/touchscreen/cyttsp_core.c @@ -242,7 +242,7 @@ static int cyttsp_soft_reset(struct cyttsp *ts) int retval; /* wait for interrupt to set ready completion */ - INIT_COMPLETION(ts->bl_ready); + reinit_completion(&ts->bl_ready); ts->state = CY_BL_STATE; enable_irq(ts->irq); diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 181c9ba929cd..2349d6272aef 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1212,7 +1212,10 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd, arm_smmu_flush_pgtable(smmu, page_address(table), ARM_SMMU_PTE_HWTABLE_SIZE); - pgtable_page_ctor(table); + if (!pgtable_page_ctor(table)) { + __free_page(table); + return -ENOMEM; + } pmd_populate(NULL, pmd, table); arm_smmu_flush_pgtable(smmu, pmd, sizeof(*pmd)); } diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 50ea7ed24dce..81b0fa660452 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -950,7 +950,7 @@ static int crypt_convert(struct crypt_config *cc, /* async */ case -EBUSY: wait_for_completion(&ctx->restart); - INIT_COMPLETION(ctx->restart); + reinit_completion(&ctx->restart); /* fall through*/ case -EINPROGRESS: this_cc->req = NULL; diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index f8b906843926..7f0e17a27aeb 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -293,20 +293,6 @@ static void __release_stripe(struct r5conf *conf, struct stripe_head *sh) do_release_stripe(conf, sh); } -static struct llist_node *llist_reverse_order(struct llist_node *head) -{ - struct llist_node *new_head = NULL; - - while (head) { - struct llist_node *tmp = head; - head = head->next; - tmp->next = new_head; - new_head = tmp; - } - - return new_head; -} - /* should hold conf->device_lock already */ static int release_stripe_list(struct r5conf *conf) { diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c index 4c1105977090..281916591437 100644 --- a/drivers/media/platform/blackfin/bfin_capture.c +++ b/drivers/media/platform/blackfin/bfin_capture.c @@ -422,7 +422,7 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count) return ret; } - INIT_COMPLETION(bcap_dev->comp); + reinit_completion(&bcap_dev->comp); bcap_dev->stop = false; return 0; } diff --git a/drivers/media/radio/radio-wl1273.c b/drivers/media/radio/radio-wl1273.c index 97c2c18803ef..9cf6731fb816 100644 --- a/drivers/media/radio/radio-wl1273.c +++ b/drivers/media/radio/radio-wl1273.c @@ -375,7 +375,7 @@ static int wl1273_fm_set_tx_freq(struct wl1273_device *radio, unsigned int freq) if (r) return r; - INIT_COMPLETION(radio->busy); + reinit_completion(&radio->busy); /* wait for the FR IRQ */ r = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000)); @@ -389,7 +389,7 @@ static int wl1273_fm_set_tx_freq(struct wl1273_device *radio, unsigned int freq) if (r) return r; - INIT_COMPLETION(radio->busy); + reinit_completion(&radio->busy); /* wait for the POWER_ENB IRQ */ r = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000)); @@ -444,7 +444,7 @@ static int wl1273_fm_set_rx_freq(struct wl1273_device *radio, unsigned int freq) goto err; } - INIT_COMPLETION(radio->busy); + reinit_completion(&radio->busy); r = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000)); if (!r) { @@ -805,7 +805,7 @@ static int wl1273_fm_set_seek(struct wl1273_device *radio, if (level < SCHAR_MIN || level > SCHAR_MAX) return -EINVAL; - INIT_COMPLETION(radio->busy); + reinit_completion(&radio->busy); dev_dbg(radio->dev, "%s: BUSY\n", __func__); r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags); @@ -847,7 +847,7 @@ static int wl1273_fm_set_seek(struct wl1273_device *radio, if (r) goto out; - INIT_COMPLETION(radio->busy); + reinit_completion(&radio->busy); dev_dbg(radio->dev, "%s: BUSY\n", __func__); r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK); diff --git a/drivers/media/radio/si470x/radio-si470x-common.c b/drivers/media/radio/si470x/radio-si470x-common.c index 5c57e5b0f949..0bd250068285 100644 --- a/drivers/media/radio/si470x/radio-si470x-common.c +++ b/drivers/media/radio/si470x/radio-si470x-common.c @@ -218,7 +218,7 @@ static int si470x_set_chan(struct si470x_device *radio, unsigned short chan) goto done; /* wait till tune operation has completed */ - INIT_COMPLETION(radio->completion); + reinit_completion(&radio->completion); retval = wait_for_completion_timeout(&radio->completion, msecs_to_jiffies(tune_timeout)); if (!retval) @@ -341,7 +341,7 @@ static int si470x_set_seek(struct si470x_device *radio, return retval; /* wait till tune operation has completed */ - INIT_COMPLETION(radio->completion); + reinit_completion(&radio->completion); retval = wait_for_completion_timeout(&radio->completion, msecs_to_jiffies(seek_timeout)); if (!retval) diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c index 19632b1c2190..b53626ba6f49 100644 --- a/drivers/media/rc/iguanair.c +++ b/drivers/media/rc/iguanair.c @@ -207,7 +207,7 @@ static int iguanair_send(struct iguanair *ir, unsigned size) { int rc; - INIT_COMPLETION(ir->completion); + reinit_completion(&ir->completion); ir->urb_out->transfer_buffer_length = size; rc = usb_submit_urb(ir->urb_out, GFP_KERNEL); diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c index bbf4aea1627d..a0547dbf9806 100644 --- a/drivers/memstick/core/memstick.c +++ b/drivers/memstick/core/memstick.c @@ -253,7 +253,7 @@ void memstick_new_req(struct memstick_host *host) { if (host->card) { host->retries = cmd_retries; - INIT_COMPLETION(host->card->mrq_complete); + reinit_completion(&host->card->mrq_complete); host->request(host); } } diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c index 9188ef5d677e..24f2f8473dee 100644 --- a/drivers/memstick/core/ms_block.c +++ b/drivers/memstick/core/ms_block.c @@ -401,10 +401,10 @@ again: sizeof(struct ms_status_register))) return 0; - msb->state = MSB_RP_RECIVE_STATUS_REG; + msb->state = MSB_RP_RECEIVE_STATUS_REG; return 0; - case MSB_RP_RECIVE_STATUS_REG: + case MSB_RP_RECEIVE_STATUS_REG: msb->regs.status = *(struct ms_status_register *)mrq->data; msb->state = MSB_RP_SEND_OOB_READ; /* fallthrough */ diff --git a/drivers/memstick/core/ms_block.h b/drivers/memstick/core/ms_block.h index 96e637550988..c75198dbf139 100644 --- a/drivers/memstick/core/ms_block.h +++ b/drivers/memstick/core/ms_block.h @@ -223,7 +223,7 @@ enum msb_readpage_states { MSB_RP_RECEIVE_INT_REQ_RESULT, MSB_RP_SEND_READ_STATUS_REG, - MSB_RP_RECIVE_STATUS_REG, + MSB_RP_RECEIVE_STATUS_REG, MSB_RP_SEND_OOB_READ, MSB_RP_RECEIVE_OOB_READ, diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c index 1b6e91345222..31727bf285d0 100644 --- a/drivers/memstick/host/r592.c +++ b/drivers/memstick/host/r592.c @@ -290,7 +290,7 @@ static int r592_transfer_fifo_dma(struct r592_device *dev) dbg_verbose("doing dma transfer"); dev->dma_error = 0; - INIT_COMPLETION(dev->dma_done); + reinit_completion(&dev->dma_done); /* TODO: hidden assumption about nenth beeing always 1 */ sg_count = dma_map_sg(&dev->pci_dev->dev, &dev->req->sg, 1, is_write ? diff --git a/drivers/misc/mic/card/mic_virtio.c b/drivers/misc/mic/card/mic_virtio.c index 914cc9b2caad..8aa42e738acc 100644 --- a/drivers/misc/mic/card/mic_virtio.c +++ b/drivers/misc/mic/card/mic_virtio.c @@ -493,7 +493,7 @@ static int mic_remove_device(struct mic_device_desc __iomem *d, ioread8(&dc->config_change), ioread8(&d->type), mvdev); status = ioread8(&d->status); - INIT_COMPLETION(mvdev->reset_done); + reinit_completion(&mvdev->reset_done); unregister_virtio_device(&mvdev->vdev); mic_free_card_irq(mvdev->virtio_cookie, mvdev); if (status & VIRTIO_CONFIG_S_DRIVER_OK) diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c index b079c65eed6d..7558d9186438 100644 --- a/drivers/misc/mic/host/mic_boot.c +++ b/drivers/misc/mic/host/mic_boot.c @@ -38,7 +38,7 @@ static void mic_reset(struct mic_device *mdev) #define MIC_RESET_TO (45) - INIT_COMPLETION(mdev->reset_wait); + reinit_completion(&mdev->reset_wait); mdev->ops->reset_fw_ready(mdev); mdev->ops->reset(mdev); diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c index 83907c720594..96853a09788a 100644 --- a/drivers/misc/ti-st/st_kim.c +++ b/drivers/misc/ti-st/st_kim.c @@ -218,7 +218,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) pr_debug("%s", __func__); - INIT_COMPLETION(kim_gdata->kim_rcvd); + reinit_completion(&kim_gdata->kim_rcvd); if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) { pr_err("kim: couldn't write 4 bytes"); return -EIO; @@ -229,7 +229,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) pr_err(" waiting for ver info- timed out "); return -ETIMEDOUT; } - INIT_COMPLETION(kim_gdata->kim_rcvd); + reinit_completion(&kim_gdata->kim_rcvd); /* the positions 12 & 13 in the response buffer provide with the * chip, major & minor numbers */ @@ -362,7 +362,7 @@ static long download_firmware(struct kim_data_s *kim_gdata) /* reinit completion before sending for the * relevant wait */ - INIT_COMPLETION(kim_gdata->kim_rcvd); + reinit_completion(&kim_gdata->kim_rcvd); /* * Free space found in uart buffer, call st_int_write @@ -398,7 +398,7 @@ static long download_firmware(struct kim_data_s *kim_gdata) release_firmware(kim_gdata->fw_entry); return -ETIMEDOUT; } - INIT_COMPLETION(kim_gdata->kim_rcvd); + reinit_completion(&kim_gdata->kim_rcvd); break; case ACTION_DELAY: /* sleep */ pr_info("sleep command in scr"); @@ -474,7 +474,7 @@ long st_kim_start(void *kim_data) gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH); mdelay(100); /* re-initialize the completion */ - INIT_COMPLETION(kim_gdata->ldisc_installed); + reinit_completion(&kim_gdata->ldisc_installed); /* send notification to UIM */ kim_gdata->ldisc_install = 1; pr_info("ldisc_install = 1"); @@ -525,7 +525,7 @@ long st_kim_stop(void *kim_data) kim_gdata->kim_pdev->dev.platform_data; struct tty_struct *tty = kim_gdata->core_data->tty; - INIT_COMPLETION(kim_gdata->ldisc_installed); + reinit_completion(&kim_gdata->ldisc_installed); if (tty) { /* can be called before ldisc is installed */ /* Flush any pending characters in the driver and discipline. */ diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 4edea7f4462f..9dfdb06c508b 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -396,7 +396,7 @@ static void wait_op_done(struct mxc_nand_host *host, int useirq) if (useirq) { if (!host->devtype_data->check_int(host)) { - INIT_COMPLETION(host->op_completion); + reinit_completion(&host->op_completion); irq_control(host, 1); wait_for_completion(&host->op_completion); } diff --git a/drivers/mtd/nand/r852.c b/drivers/mtd/nand/r852.c index 9dcf02d22aa8..325930db3f04 100644 --- a/drivers/mtd/nand/r852.c +++ b/drivers/mtd/nand/r852.c @@ -181,7 +181,7 @@ static void r852_do_dma(struct r852_device *dev, uint8_t *buf, int do_read) /* Set dma direction */ dev->dma_dir = do_read; dev->dma_stage = 1; - INIT_COMPLETION(dev->dma_done); + reinit_completion(&dev->dma_done); dbg_verbose("doing dma %s ", do_read ? "read" : "write"); diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c index 2362909d20c0..6547c84afc3a 100644 --- a/drivers/mtd/onenand/omap2.c +++ b/drivers/mtd/onenand/omap2.c @@ -159,7 +159,7 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state) syscfg = read_reg(c, ONENAND_REG_SYS_CFG1); } - INIT_COMPLETION(c->irq_done); + reinit_completion(&c->irq_done); if (c->gpio_irq) { result = gpio_get_value(c->gpio_irq); if (result == -1) { @@ -349,7 +349,7 @@ static int omap3_onenand_read_bufferram(struct mtd_info *mtd, int area, omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC, dma_dst, 0, 0); - INIT_COMPLETION(c->dma_done); + reinit_completion(&c->dma_done); omap_start_dma(c->dma_channel); timeout = jiffies + msecs_to_jiffies(20); @@ -420,7 +420,7 @@ static int omap3_onenand_write_bufferram(struct mtd_info *mtd, int area, omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC, dma_dst, 0, 0); - INIT_COMPLETION(c->dma_done); + reinit_completion(&c->dma_done); omap_start_dma(c->dma_channel); timeout = jiffies + msecs_to_jiffies(20); @@ -499,7 +499,7 @@ static int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area, omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC, dma_dst, 0, 0); - INIT_COMPLETION(c->dma_done); + reinit_completion(&c->dma_done); omap_start_dma(c->dma_channel); wait_for_completion(&c->dma_done); @@ -544,7 +544,7 @@ static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area, omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC, dma_dst, 0, 0); - INIT_COMPLETION(c->dma_done); + reinit_completion(&c->dma_done); omap_start_dma(c->dma_channel); wait_for_completion(&c->dma_done); diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c index 09810ddd11ec..a01a6a74ee3a 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c @@ -3537,7 +3537,7 @@ int qlcnic_83xx_resume(struct qlcnic_adapter *adapter) void qlcnic_83xx_reinit_mbx_work(struct qlcnic_mailbox *mbx) { - INIT_COMPLETION(mbx->completion); + reinit_completion(&mbx->completion); set_bit(QLC_83XX_MBX_READY, &mbx->status); } diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c index 6f10b4964726..2cbe1c249996 100644 --- a/drivers/net/ieee802154/at86rf230.c +++ b/drivers/net/ieee802154/at86rf230.c @@ -561,7 +561,7 @@ at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb) spin_lock_irqsave(&lp->lock, flags); lp->is_tx = 1; - INIT_COMPLETION(lp->tx_complete); + reinit_completion(&lp->tx_complete); spin_unlock_irqrestore(&lp->lock, flags); rc = at86rf230_write_fbuf(lp, skb->data, skb->len); diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c index 0632d34905c7..c6e46d6e9f75 100644 --- a/drivers/net/ieee802154/mrf24j40.c +++ b/drivers/net/ieee802154/mrf24j40.c @@ -343,7 +343,7 @@ static int mrf24j40_tx(struct ieee802154_dev *dev, struct sk_buff *skb) if (ret) goto err; - INIT_COMPLETION(devrec->tx_complete); + reinit_completion(&devrec->tx_complete); /* Set TXNTRIG bit of TXNCON to send packet */ ret = read_short_reg(devrec, REG_TXNCON, &val); diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c index 3118d7506734..edae50b52806 100644 --- a/drivers/net/wireless/ath/ath10k/htc.c +++ b/drivers/net/wireless/ath/ath10k/htc.c @@ -534,7 +534,7 @@ int ath10k_htc_wait_target(struct ath10k_htc *htc) u16 credit_count; u16 credit_size; - INIT_COMPLETION(htc->ctl_resp); + reinit_completion(&htc->ctl_resp); status = ath10k_hif_start(htc->ar); if (status) { @@ -669,7 +669,7 @@ int ath10k_htc_connect_service(struct ath10k_htc *htc, req_msg->flags = __cpu_to_le16(flags); req_msg->service_id = __cpu_to_le16(conn_req->service_id); - INIT_COMPLETION(htc->ctl_resp); + reinit_completion(&htc->ctl_resp); status = ath10k_htc_send(htc, ATH10K_HTC_EP_0, skb); if (status) { diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 0b1cc516e778..97ac8c87cba2 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -92,7 +92,7 @@ static int ath10k_install_key(struct ath10k_vif *arvif, lockdep_assert_held(&ar->conf_mutex); - INIT_COMPLETION(ar->install_key_done); + reinit_completion(&ar->install_key_done); ret = ath10k_send_key(arvif, key, cmd, macaddr); if (ret) @@ -438,7 +438,7 @@ static int ath10k_vdev_start(struct ath10k_vif *arvif) lockdep_assert_held(&ar->conf_mutex); - INIT_COMPLETION(ar->vdev_setup_done); + reinit_completion(&ar->vdev_setup_done); arg.vdev_id = arvif->vdev_id; arg.dtim_period = arvif->dtim_period; @@ -491,7 +491,7 @@ static int ath10k_vdev_stop(struct ath10k_vif *arvif) lockdep_assert_held(&ar->conf_mutex); - INIT_COMPLETION(ar->vdev_setup_done); + reinit_completion(&ar->vdev_setup_done); ret = ath10k_wmi_vdev_stop(ar, arvif->vdev_id); if (ret) { @@ -1666,7 +1666,7 @@ void ath10k_offchan_tx_work(struct work_struct *work) } spin_lock_bh(&ar->data_lock); - INIT_COMPLETION(ar->offchan_tx_completed); + reinit_completion(&ar->offchan_tx_completed); ar->offchan_tx_skb = skb; spin_unlock_bh(&ar->data_lock); @@ -2476,8 +2476,8 @@ static int ath10k_hw_scan(struct ieee80211_hw *hw, goto exit; } - INIT_COMPLETION(ar->scan.started); - INIT_COMPLETION(ar->scan.completed); + reinit_completion(&ar->scan.started); + reinit_completion(&ar->scan.completed); ar->scan.in_progress = true; ar->scan.aborting = false; ar->scan.is_roc = false; @@ -2832,9 +2832,9 @@ static int ath10k_remain_on_channel(struct ieee80211_hw *hw, goto exit; } - INIT_COMPLETION(ar->scan.started); - INIT_COMPLETION(ar->scan.completed); - INIT_COMPLETION(ar->scan.on_channel); + reinit_completion(&ar->scan.started); + reinit_completion(&ar->scan.completed); + reinit_completion(&ar->scan.on_channel); ar->scan.in_progress = true; ar->scan.aborting = false; ar->scan.is_roc = true; diff --git a/drivers/net/wireless/ath/carl9170/usb.c b/drivers/net/wireless/ath/carl9170/usb.c index 307bc0ddff99..ca115f33746f 100644 --- a/drivers/net/wireless/ath/carl9170/usb.c +++ b/drivers/net/wireless/ath/carl9170/usb.c @@ -773,7 +773,7 @@ void carl9170_usb_stop(struct ar9170 *ar) complete_all(&ar->cmd_wait); /* This is required to prevent an early completion on _start */ - INIT_COMPLETION(ar->cmd_wait); + reinit_completion(&ar->cmd_wait); /* * Note: diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c index 0a2844c48a60..fd30cddd5882 100644 --- a/drivers/net/wireless/ath/wil6210/main.c +++ b/drivers/net/wireless/ath/wil6210/main.c @@ -250,7 +250,7 @@ int wil_reset(struct wil6210_priv *wil) /* init after reset */ wil->pending_connect_cid = -1; - INIT_COMPLETION(wil->wmi_ready); + reinit_completion(&wil->wmi_ready); /* TODO: release MAC reset */ wil6210_enable_irq(wil); diff --git a/drivers/net/wireless/brcm80211/brcmfmac/p2p.c b/drivers/net/wireless/brcm80211/brcmfmac/p2p.c index d7a974532909..5b5b952d47b1 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/p2p.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/p2p.c @@ -1148,7 +1148,7 @@ static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p) pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; - INIT_COMPLETION(afx_hdl->act_frm_scan); + reinit_completion(&afx_hdl->act_frm_scan); set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status); afx_hdl->is_active = true; afx_hdl->peer_chan = P2P_INVALID_CHANNEL; @@ -1501,7 +1501,7 @@ static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p, brcmf_dbg(TRACE, "Enter\n"); - INIT_COMPLETION(p2p->send_af_done); + reinit_completion(&p2p->send_af_done); clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status); clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status); diff --git a/drivers/net/wireless/rt2x00/rt2800mmio.c b/drivers/net/wireless/rt2x00/rt2800mmio.c index ae152280e071..a8cc736b5063 100644 --- a/drivers/net/wireless/rt2x00/rt2800mmio.c +++ b/drivers/net/wireless/rt2x00/rt2800mmio.c @@ -446,7 +446,7 @@ static void rt2800mmio_txstatus_interrupt(struct rt2x00_dev *rt2x00dev) if (!rt2x00_get_field32(status, TX_STA_FIFO_VALID)) break; - if (!kfifo_put(&rt2x00dev->txstatus_fifo, &status)) { + if (!kfifo_put(&rt2x00dev->txstatus_fifo, status)) { rt2x00_warn(rt2x00dev, "TX status FIFO overrun, drop tx status report\n"); break; } diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c index 997df03a0c2e..a81ceb61d746 100644 --- a/drivers/net/wireless/rt2x00/rt2800usb.c +++ b/drivers/net/wireless/rt2x00/rt2800usb.c @@ -164,7 +164,7 @@ static bool rt2800usb_tx_sta_fifo_read_completed(struct rt2x00_dev *rt2x00dev, valid = rt2x00_get_field32(tx_status, TX_STA_FIFO_VALID); if (valid) { - if (!kfifo_put(&rt2x00dev->txstatus_fifo, &tx_status)) + if (!kfifo_put(&rt2x00dev->txstatus_fifo, tx_status)) rt2x00_warn(rt2x00dev, "TX status FIFO overrun\n"); queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work); diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c index 7ef0b4a181e1..84d94f572a46 100644 --- a/drivers/net/wireless/zd1211rw/zd_usb.c +++ b/drivers/net/wireless/zd1211rw/zd_usb.c @@ -1619,7 +1619,7 @@ static void prepare_read_regs_int(struct zd_usb *usb, atomic_set(&intr->read_regs_enabled, 1); intr->read_regs.req = req; intr->read_regs.req_count = count; - INIT_COMPLETION(intr->read_regs.completion); + reinit_completion(&intr->read_regs.completion); spin_unlock_irq(&intr->lock); } diff --git a/drivers/parport/parport_ip32.c b/drivers/parport/parport_ip32.c index d4716273651e..c864f82bd37d 100644 --- a/drivers/parport/parport_ip32.c +++ b/drivers/parport/parport_ip32.c @@ -1331,7 +1331,7 @@ static unsigned int parport_ip32_fwp_wait_interrupt(struct parport *p) break; /* Initialize mutex used to take interrupts into account */ - INIT_COMPLETION(priv->irq_complete); + reinit_completion(&priv->irq_complete); /* Enable serviceIntr */ parport_ip32_frob_econtrol(p, ECR_SERVINTR, 0); @@ -1446,7 +1446,7 @@ static size_t parport_ip32_fifo_write_block_dma(struct parport *p, priv->irq_mode = PARPORT_IP32_IRQ_HERE; parport_ip32_dma_start(DMA_TO_DEVICE, (void *)buf, len); - INIT_COMPLETION(priv->irq_complete); + reinit_completion(&priv->irq_complete); parport_ip32_frob_econtrol(p, ECR_DMAEN | ECR_SERVINTR, ECR_DMAEN); nfault_timeout = min((unsigned long)physport->cad->timeout, diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c index 85ca36f2136d..6b3a958e1be6 100644 --- a/drivers/pci/pcie/aer/aerdrv_core.c +++ b/drivers/pci/pcie/aer/aerdrv_core.c @@ -574,7 +574,7 @@ void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn, }; spin_lock_irqsave(&aer_recover_ring_lock, flags); - if (kfifo_put(&aer_recover_ring, &entry)) + if (kfifo_put(&aer_recover_ring, entry)) schedule_work(&aer_recover_work); else pr_err("AER recover: Buffer overflow when recovering AER for %04x:%02x:%02x:%x\n", diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c index 8eea2efbbb6d..605a9be55129 100644 --- a/drivers/platform/x86/apple-gmux.c +++ b/drivers/platform/x86/apple-gmux.c @@ -289,7 +289,7 @@ static int gmux_switchto(enum vga_switcheroo_client_id id) static int gmux_set_discrete_state(struct apple_gmux_data *gmux_data, enum vga_switcheroo_state state) { - INIT_COMPLETION(gmux_data->powerchange_done); + reinit_completion(&gmux_data->powerchange_done); if (state == VGA_SWITCHEROO_ON) { gmux_write8(gmux_data, GMUX_PORT_DISCRETE_POWER, 1); diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c index 754970717c31..3cb4178e397c 100644 --- a/drivers/power/ab8500_fg.c +++ b/drivers/power/ab8500_fg.c @@ -574,8 +574,8 @@ int ab8500_fg_inst_curr_start(struct ab8500_fg *di) } /* Return and WFI */ - INIT_COMPLETION(di->ab8500_fg_started); - INIT_COMPLETION(di->ab8500_fg_complete); + reinit_completion(&di->ab8500_fg_started); + reinit_completion(&di->ab8500_fg_complete); enable_irq(di->irq); /* Note: cc_lock is still locked */ diff --git a/drivers/power/jz4740-battery.c b/drivers/power/jz4740-battery.c index d9686aa9270a..6c8931d4ad62 100644 --- a/drivers/power/jz4740-battery.c +++ b/drivers/power/jz4740-battery.c @@ -73,7 +73,7 @@ static long jz_battery_read_voltage(struct jz_battery *battery) mutex_lock(&battery->lock); - INIT_COMPLETION(battery->read_completion); + reinit_completion(&battery->read_completion); enable_irq(battery->irq); battery->cell->enable(battery->pdev); diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c index 45560ffb038d..965a9da70867 100644 --- a/drivers/rtc/rtc-hid-sensor-time.c +++ b/drivers/rtc/rtc-hid-sensor-time.c @@ -209,7 +209,7 @@ static int hid_rtc_read_time(struct device *dev, struct rtc_time *tm) platform_get_drvdata(to_platform_device(dev)); int ret; - INIT_COMPLETION(time_state->comp_last_time); + reinit_completion(&time_state->comp_last_time); /* get a report with all values through requesting one value */ sensor_hub_input_attr_get_raw_value(time_state->common_attributes.hsdev, HID_USAGE_SENSOR_TIME, hid_time_addresses[0], @@ -236,7 +236,7 @@ static const struct rtc_class_ops hid_time_rtc_ops = { static int hid_time_probe(struct platform_device *pdev) { int ret = 0; - struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev); struct hid_time_state *time_state = devm_kzalloc(&pdev->dev, sizeof(struct hid_time_state), GFP_KERNEL); @@ -281,11 +281,18 @@ static int hid_time_probe(struct platform_device *pdev) goto err_open; } + /* + * Enable HID input processing early in order to be able to read the + * clock already in devm_rtc_device_register(). + */ + hid_device_io_start(hsdev->hdev); + time_state->rtc = devm_rtc_device_register(&pdev->dev, "hid-sensor-time", &hid_time_rtc_ops, THIS_MODULE); if (IS_ERR_OR_NULL(time_state->rtc)) { + hid_device_io_stop(hsdev->hdev); ret = time_state->rtc ? PTR_ERR(time_state->rtc) : -ENODEV; time_state->rtc = NULL; dev_err(&pdev->dev, "rtc device register failed!\n"); @@ -303,7 +310,7 @@ err_open: static int hid_time_remove(struct platform_device *pdev) { - struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; + struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev); sensor_hub_device_close(hsdev); sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME); diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c index 4c332143a310..3ed666fe840a 100644 --- a/drivers/spi/spi-bcm2835.c +++ b/drivers/spi/spi-bcm2835.c @@ -217,7 +217,7 @@ static int bcm2835_spi_start_transfer(struct spi_device *spi, cs |= spi->chip_select; } - INIT_COMPLETION(bs->done); + reinit_completion(&bs->done); bs->tx_buf = tfr->tx_buf; bs->rx_buf = tfr->rx_buf; bs->len = tfr->len; diff --git a/drivers/spi/spi-clps711x.c b/drivers/spi/spi-clps711x.c index e2a5a426b2ef..6f03d7e6435d 100644 --- a/drivers/spi/spi-clps711x.c +++ b/drivers/spi/spi-clps711x.c @@ -105,7 +105,7 @@ static int spi_clps711x_transfer_one_message(struct spi_master *master, gpio_set_value(cs, !!(msg->spi->mode & SPI_CS_HIGH)); - INIT_COMPLETION(hw->done); + reinit_completion(&hw->done); hw->count = 0; hw->len = xfer->len; diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index dd72445ba2ea..50b2d88c8190 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -554,7 +554,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t) clear_io_bits(dspi->base + SPIGCR1, SPIGCR1_POWERDOWN_MASK); set_io_bits(dspi->base + SPIGCR1, SPIGCR1_SPIENA_MASK); - INIT_COMPLETION(dspi->done); + reinit_completion(&dspi->done); if (spicfg->io_type == SPI_IO_TYPE_INTR) set_io_bits(dspi->base + SPIINT, SPIINT_MASKINT); diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index 32200d4f8780..80d8f40f7e05 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -232,7 +232,7 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t) mpc8xxx_spi->tx = t->tx_buf; mpc8xxx_spi->rx = t->rx_buf; - INIT_COMPLETION(mpc8xxx_spi->done); + reinit_completion(&mpc8xxx_spi->done); /* Set SPCOM[CS] and SPCOM[TRANLEN] field */ if ((t->len - 1) > SPCOM_TRANLEN_MAX) { diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index 2129fcd1c31b..119f7af94537 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -339,7 +339,7 @@ static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t, mpc8xxx_spi->tx = t->tx_buf; mpc8xxx_spi->rx = t->rx_buf; - INIT_COMPLETION(mpc8xxx_spi->done); + reinit_completion(&mpc8xxx_spi->done); if (mpc8xxx_spi->flags & SPI_CPM_MODE) ret = fsl_spi_cpm_bufs(mpc8xxx_spi, t, is_dma_mapped); diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c index 58d5ee0e4443..9602bbd8d7ea 100644 --- a/drivers/spi/spi-mpc512x-psc.c +++ b/drivers/spi/spi-mpc512x-psc.c @@ -167,7 +167,7 @@ static int mpc512x_psc_spi_transfer_rxtx(struct spi_device *spi, } /* have the ISR trigger when the TX FIFO is empty */ - INIT_COMPLETION(mps->txisrdone); + reinit_completion(&mps->txisrdone); out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY); out_be32(&fifo->tximr, MPC512x_PSC_FIFO_EMPTY); wait_for_completion(&mps->txisrdone); diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c index de333059a9a7..73afb56c08cc 100644 --- a/drivers/spi/spi-mxs.c +++ b/drivers/spi/spi-mxs.c @@ -202,7 +202,7 @@ static int mxs_spi_txrx_dma(struct mxs_spi *spi, if (!dma_xfer) return -ENOMEM; - INIT_COMPLETION(spi->c); + reinit_completion(&spi->c); /* Chip select was already programmed into CTRL0 */ ctrl0 = readl(ssp->base + HW_SSP_CTRL0); diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 9e2020df9e0f..4c4b0a1219a7 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -890,7 +890,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, unsigned long flags; int use_dma; - INIT_COMPLETION(sdd->xfer_completion); + reinit_completion(&sdd->xfer_completion); /* Only BPW and Speed may change across transfers */ bpw = xfer->bits_per_word; diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 2a95435a6a11..c74298cf70e2 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -465,7 +465,7 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_TXE); /* start by setting frame bit */ - INIT_COMPLETION(p->done); + reinit_completion(&p->done); ret = ret ? ret : sh_msiof_modify_ctr_wait(p, 0, CTR_TFSE); if (ret) { dev_err(&p->pdev->dev, "failed to start hardware\n"); diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 592b4aff651f..ed5e501c4652 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -305,8 +305,8 @@ static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) sspi->tx = t->tx_buf ? t->tx_buf : sspi->dummypage; sspi->rx = t->rx_buf ? t->rx_buf : sspi->dummypage; sspi->left_tx_word = sspi->left_rx_word = t->len / sspi->word_width; - INIT_COMPLETION(sspi->rx_done); - INIT_COMPLETION(sspi->tx_done); + reinit_completion(&sspi->rx_done); + reinit_completion(&sspi->tx_done); writel(SIRFSOC_SPI_INT_MASK_ALL, sspi->base + SIRFSOC_SPI_INT_STATUS); diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index 9146bb3c2489..aaecfb3ebf58 100644 --- a/drivers/spi/spi-tegra114.c +++ b/drivers/spi/spi-tegra114.c @@ -451,7 +451,7 @@ static void tegra_spi_dma_complete(void *args) static int tegra_spi_start_tx_dma(struct tegra_spi_data *tspi, int len) { - INIT_COMPLETION(tspi->tx_dma_complete); + reinit_completion(&tspi->tx_dma_complete); tspi->tx_dma_desc = dmaengine_prep_slave_single(tspi->tx_dma_chan, tspi->tx_dma_phys, len, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); @@ -470,7 +470,7 @@ static int tegra_spi_start_tx_dma(struct tegra_spi_data *tspi, int len) static int tegra_spi_start_rx_dma(struct tegra_spi_data *tspi, int len) { - INIT_COMPLETION(tspi->rx_dma_complete); + reinit_completion(&tspi->rx_dma_complete); tspi->rx_dma_desc = dmaengine_prep_slave_single(tspi->rx_dma_chan, tspi->rx_dma_phys, len, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); @@ -844,7 +844,7 @@ static int tegra_spi_transfer_one_message(struct spi_master *master, list_for_each_entry(xfer, &msg->transfers, transfer_list) { unsigned long cmd1; - INIT_COMPLETION(tspi->xfer_completion); + reinit_completion(&tspi->xfer_completion); cmd1 = tegra_spi_setup_transfer_one(spi, xfer, is_first_msg); diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c index 79be8ce6a9d1..4dc8e8129459 100644 --- a/drivers/spi/spi-tegra20-sflash.c +++ b/drivers/spi/spi-tegra20-sflash.c @@ -339,7 +339,7 @@ static int tegra_sflash_transfer_one_message(struct spi_master *master, msg->actual_length = 0; single_xfer = list_is_singular(&msg->transfers); list_for_each_entry(xfer, &msg->transfers, transfer_list) { - INIT_COMPLETION(tsd->xfer_completion); + reinit_completion(&tsd->xfer_completion); ret = tegra_sflash_start_transfer_one(spi, xfer, is_first_msg, single_xfer); if (ret < 0) { diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c index af0a67886ae8..e66715ba37ed 100644 --- a/drivers/spi/spi-tegra20-slink.c +++ b/drivers/spi/spi-tegra20-slink.c @@ -462,7 +462,7 @@ static void tegra_slink_dma_complete(void *args) static int tegra_slink_start_tx_dma(struct tegra_slink_data *tspi, int len) { - INIT_COMPLETION(tspi->tx_dma_complete); + reinit_completion(&tspi->tx_dma_complete); tspi->tx_dma_desc = dmaengine_prep_slave_single(tspi->tx_dma_chan, tspi->tx_dma_phys, len, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); @@ -481,7 +481,7 @@ static int tegra_slink_start_tx_dma(struct tegra_slink_data *tspi, int len) static int tegra_slink_start_rx_dma(struct tegra_slink_data *tspi, int len) { - INIT_COMPLETION(tspi->rx_dma_complete); + reinit_completion(&tspi->rx_dma_complete); tspi->rx_dma_desc = dmaengine_prep_slave_single(tspi->rx_dma_chan, tspi->rx_dma_phys, len, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); @@ -836,7 +836,7 @@ static int tegra_slink_transfer_one(struct spi_master *master, struct tegra_slink_data *tspi = spi_master_get_devdata(master); int ret; - INIT_COMPLETION(tspi->xfer_completion); + reinit_completion(&tspi->xfer_completion); ret = tegra_slink_start_transfer_one(spi, xfer); if (ret < 0) { dev_err(tspi->dev, diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index ec3a83f52ea2..6d4ce4615163 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -258,7 +258,7 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) xspi->tx_ptr = t->tx_buf; xspi->rx_ptr = t->rx_buf; xspi->remaining_bytes = t->len; - INIT_COMPLETION(xspi->done); + reinit_completion(&xspi->done); /* Enable the transmit empty interrupt, which we use to determine diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 927998aa5e71..8d85ddc46011 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -571,7 +571,7 @@ static int spi_transfer_one_message(struct spi_master *master, list_for_each_entry(xfer, &msg->transfers, transfer_list) { trace_spi_transfer_start(msg, xfer); - INIT_COMPLETION(master->xfer_completion); + reinit_completion(&master->xfer_completion); ret = master->transfer_one(master, msg->spi, xfer); if (ret < 0) { diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c index aeae76b77be5..e2dd7830b320 100644 --- a/drivers/staging/iio/adc/mxs-lradc.c +++ b/drivers/staging/iio/adc/mxs-lradc.c @@ -783,7 +783,7 @@ static int mxs_lradc_read_raw(struct iio_dev *iio_dev, if (!ret) return -EBUSY; - INIT_COMPLETION(lradc->completion); + reinit_completion(&lradc->completion); /* * No buffered operation in progress, map the channel and trigger it. diff --git a/drivers/staging/media/solo6x10/solo6x10-p2m.c b/drivers/staging/media/solo6x10/solo6x10-p2m.c index 333594189b81..7f2f2472655b 100644 --- a/drivers/staging/media/solo6x10/solo6x10-p2m.c +++ b/drivers/staging/media/solo6x10/solo6x10-p2m.c @@ -87,7 +87,7 @@ int solo_p2m_dma_desc(struct solo_dev *solo_dev, if (mutex_lock_interruptible(&p2m_dev->mutex)) return -EINTR; - INIT_COMPLETION(p2m_dev->completion); + reinit_completion(&p2m_dev->completion); p2m_dev->error = 0; if (desc_cnt > 1 && solo_dev->type != SOLO_DEV_6110 && desc_mode) { diff --git a/drivers/staging/tidspbridge/core/sync.c b/drivers/staging/tidspbridge/core/sync.c index 7bb550acaf4a..743ff09d82d2 100644 --- a/drivers/staging/tidspbridge/core/sync.c +++ b/drivers/staging/tidspbridge/core/sync.c @@ -72,7 +72,7 @@ int sync_wait_on_multiple_events(struct sync_object **events, spin_lock_bh(&sync_lock); for (i = 0; i < count; i++) { if (completion_done(&events[i]->comp)) { - INIT_COMPLETION(events[i]->comp); + reinit_completion(&events[i]->comp); *index = i; spin_unlock_bh(&sync_lock); status = 0; @@ -92,7 +92,7 @@ int sync_wait_on_multiple_events(struct sync_object **events, spin_lock_bh(&sync_lock); for (i = 0; i < count; i++) { if (completion_done(&events[i]->comp)) { - INIT_COMPLETION(events[i]->comp); + reinit_completion(&events[i]->comp); *index = i; status = 0; } diff --git a/drivers/staging/tidspbridge/include/dspbridge/sync.h b/drivers/staging/tidspbridge/include/dspbridge/sync.h index 58a0d5c5543d..fc19b9707087 100644 --- a/drivers/staging/tidspbridge/include/dspbridge/sync.h +++ b/drivers/staging/tidspbridge/include/dspbridge/sync.h @@ -59,7 +59,7 @@ static inline void sync_init_event(struct sync_object *event) static inline void sync_reset_event(struct sync_object *event) { - INIT_COMPLETION(event->comp); + reinit_completion(&event->comp); event->multi_comp = NULL; } diff --git a/drivers/staging/tidspbridge/rmgr/drv_interface.c b/drivers/staging/tidspbridge/rmgr/drv_interface.c index 6d04eb48bfbc..1aa4a3fd0f1b 100644 --- a/drivers/staging/tidspbridge/rmgr/drv_interface.c +++ b/drivers/staging/tidspbridge/rmgr/drv_interface.c @@ -332,7 +332,7 @@ static void bridge_recover(struct work_struct *work) struct dev_object *dev; struct cfg_devnode *dev_node; if (atomic_read(&bridge_cref)) { - INIT_COMPLETION(bridge_comp); + reinit_completion(&bridge_comp); while (!wait_for_completion_timeout(&bridge_comp, msecs_to_jiffies(REC_TIMEOUT))) pr_info("%s:%d handle(s) still opened\n", @@ -348,7 +348,7 @@ static void bridge_recover(struct work_struct *work) void bridge_recover_schedule(void) { - INIT_COMPLETION(bridge_open_comp); + reinit_completion(&bridge_open_comp); recover = true; queue_work(bridge_rec_queue, &bridge_recovery_work); } @@ -389,7 +389,7 @@ static int omap3_bridge_startup(struct platform_device *pdev) #ifdef CONFIG_TIDSPBRIDGE_RECOVERY bridge_rec_queue = create_workqueue("bridge_rec_queue"); INIT_WORK(&bridge_recovery_work, bridge_recover); - INIT_COMPLETION(bridge_comp); + reinit_completion(&bridge_comp); #endif #ifdef CONFIG_PM diff --git a/drivers/tty/metag_da.c b/drivers/tty/metag_da.c index 0e888621f484..7332e2ca4615 100644 --- a/drivers/tty/metag_da.c +++ b/drivers/tty/metag_da.c @@ -495,7 +495,7 @@ static int dashtty_write(struct tty_struct *tty, const unsigned char *buf, count = dport->xmit_cnt; /* xmit buffer no longer empty? */ if (count) - INIT_COMPLETION(dport->xmit_empty); + reinit_completion(&dport->xmit_empty); mutex_unlock(&dport->xmit_lock); if (total) { diff --git a/drivers/usb/c67x00/c67x00-sched.c b/drivers/usb/c67x00/c67x00-sched.c index aa491627a45b..892cc96466eb 100644 --- a/drivers/usb/c67x00/c67x00-sched.c +++ b/drivers/usb/c67x00/c67x00-sched.c @@ -344,7 +344,7 @@ void c67x00_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep) /* it could happen that we reinitialize this completion, while * somebody was waiting for that completion. The timeout and * while loop handle such cases, but this might be improved */ - INIT_COMPLETION(c67x00->endpoint_disable); + reinit_completion(&c67x00->endpoint_disable); c67x00_sched_kick(c67x00); wait_for_completion_timeout(&c67x00->endpoint_disable, 1 * HZ); diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c index 44cf775a8627..774e8b89cdb5 100644 --- a/drivers/usb/gadget/f_fs.c +++ b/drivers/usb/gadget/f_fs.c @@ -373,7 +373,7 @@ static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len) if (req->buf == NULL) req->buf = (void *)0xDEADBABE; - INIT_COMPLETION(ffs->ep0req_completion); + reinit_completion(&ffs->ep0req_completion); ret = usb_ep_queue(ffs->gadget->ep0, req, GFP_ATOMIC); if (unlikely(ret < 0)) diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index 84657e07dc5d..439c951f261b 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -455,7 +455,7 @@ static int parport_prologue(struct parport *pp) return -1; } mos_parport->msg_pending = true; /* synch usb call pending */ - INIT_COMPLETION(mos_parport->syncmsg_compl); + reinit_completion(&mos_parport->syncmsg_compl); spin_unlock(&release_lock); mutex_lock(&mos_parport->serial->disc_mutex); diff --git a/drivers/video/exynos/exynos_mipi_dsi_common.c b/drivers/video/exynos/exynos_mipi_dsi_common.c index 7eed957b6014..85edabfdef5a 100644 --- a/drivers/video/exynos/exynos_mipi_dsi_common.c +++ b/drivers/video/exynos/exynos_mipi_dsi_common.c @@ -220,7 +220,7 @@ int exynos_mipi_dsi_wr_data(struct mipi_dsim_device *dsim, unsigned int data_id, case MIPI_DSI_DCS_LONG_WRITE: { unsigned int size, payload = 0; - INIT_COMPLETION(dsim_wr_comp); + reinit_completion(&dsim_wr_comp); size = data_size * 4; @@ -356,7 +356,7 @@ int exynos_mipi_dsi_rd_data(struct mipi_dsim_device *dsim, unsigned int data_id, msleep(20); mutex_lock(&dsim->lock); - INIT_COMPLETION(dsim_rd_comp); + reinit_completion(&dsim_rd_comp); exynos_mipi_dsi_rd_tx_header(dsim, MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, req_size); diff --git a/drivers/video/omap2/displays-new/encoder-tpd12s015.c b/drivers/video/omap2/displays-new/encoder-tpd12s015.c index 798ef200b055..d5c936cb217f 100644 --- a/drivers/video/omap2/displays-new/encoder-tpd12s015.c +++ b/drivers/video/omap2/displays-new/encoder-tpd12s015.c @@ -69,7 +69,7 @@ static int tpd_connect(struct omap_dss_device *dssdev, dst->src = dssdev; dssdev->dst = dst; - INIT_COMPLETION(ddata->hpd_completion); + reinit_completion(&ddata->hpd_completion); gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1); /* DC-DC converter needs at max 300us to get to 90% of 5V */ diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c index 264ad1c583ab..e36b18b2817b 100644 --- a/drivers/w1/masters/w1-gpio.c +++ b/drivers/w1/masters/w1-gpio.c @@ -56,7 +56,7 @@ MODULE_DEVICE_TABLE(of, w1_gpio_dt_ids); static int w1_gpio_probe_dt(struct platform_device *pdev) { - struct w1_gpio_platform_data *pdata = pdev->dev.platform_data; + struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); struct device_node *np = pdev->dev.of_node; int gpio; @@ -92,7 +92,7 @@ static int w1_gpio_probe(struct platform_device *pdev) } } - pdata = pdev->dev.platform_data; + pdata = dev_get_platdata(&pdev->dev); if (!pdata) { dev_err(&pdev->dev, "No configuration data\n"); @@ -154,7 +154,7 @@ static int w1_gpio_probe(struct platform_device *pdev) static int w1_gpio_remove(struct platform_device *pdev) { struct w1_bus_master *master = platform_get_drvdata(pdev); - struct w1_gpio_platform_data *pdata = pdev->dev.platform_data; + struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); if (pdata->enable_external_pullup) pdata->enable_external_pullup(0); @@ -171,7 +171,7 @@ static int w1_gpio_remove(struct platform_device *pdev) static int w1_gpio_suspend(struct platform_device *pdev, pm_message_t state) { - struct w1_gpio_platform_data *pdata = pdev->dev.platform_data; + struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); if (pdata->enable_external_pullup) pdata->enable_external_pullup(0); @@ -181,7 +181,7 @@ static int w1_gpio_suspend(struct platform_device *pdev, pm_message_t state) static int w1_gpio_resume(struct platform_device *pdev) { - struct w1_gpio_platform_data *pdata = pdev->dev.platform_data; + struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev); if (pdata->enable_external_pullup) pdata->enable_external_pullup(1); diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 000eae2782b6..2f6735dbf1a9 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -392,7 +392,7 @@ static int crypt_scatterlist(struct ecryptfs_crypt_stat *crypt_stat, wait_for_completion(&ecr->completion); rc = ecr->rc; - INIT_COMPLETION(ecr->completion); + reinit_completion(&ecr->completion); } out: ablkcipher_request_free(req); diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c index efc85b1377cc..3c6136f98c73 100644 --- a/fs/hfsplus/xattr.c +++ b/fs/hfsplus/xattr.c @@ -129,7 +129,7 @@ static int can_set_xattr(struct inode *inode, const char *name, static void hfsplus_init_header_node(struct inode *attr_file, u32 clump_size, - char *buf, size_t node_size) + char *buf, u16 node_size) { struct hfs_bnode_desc *desc; struct hfs_btree_header_rec *head; @@ -139,8 +139,9 @@ static void hfsplus_init_header_node(struct inode *attr_file, char *bmp; u32 used_nodes; u32 used_bmp_bytes; + loff_t tmp; - hfs_dbg(ATTR_MOD, "init_hdr_attr_file: clump %u, node_size %zu\n", + hfs_dbg(ATTR_MOD, "init_hdr_attr_file: clump %u, node_size %u\n", clump_size, node_size); /* The end of the node contains list of record offsets */ @@ -154,7 +155,9 @@ static void hfsplus_init_header_node(struct inode *attr_file, head = (struct hfs_btree_header_rec *)(buf + offset); head->node_size = cpu_to_be16(node_size); - head->node_count = cpu_to_be32(i_size_read(attr_file) / node_size); + tmp = i_size_read(attr_file); + do_div(tmp, node_size); + head->node_count = cpu_to_be32(tmp); head->free_nodes = cpu_to_be32(be32_to_cpu(head->node_count) - 1); head->clump_size = cpu_to_be32(clump_size); head->attributes |= cpu_to_be32(HFS_TREE_BIGKEYS | HFS_TREE_VARIDXKEYS); diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index c8e729deb4f7..74a7e12e10df 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -244,7 +244,7 @@ static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); spin_lock(&tbl->slot_tbl_lock); if (tbl->highest_used_slotid != NFS4_NO_SLOT) { - INIT_COMPLETION(tbl->complete); + reinit_completion(&tbl->complete); spin_unlock(&tbl->slot_tbl_lock); return wait_for_completion_interruptible(&tbl->complete); } diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 3a44a648dae7..3407b2c62b21 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -1304,7 +1304,7 @@ static int ocfs2_wait_for_mask(struct ocfs2_mask_waiter *mw) { wait_for_completion(&mw->mw_complete); /* Re-arm the completion in case we want to wait on it again */ - INIT_COMPLETION(mw->mw_complete); + reinit_completion(&mw->mw_complete); return mw->mw_status; } @@ -1355,7 +1355,7 @@ static int ocfs2_wait_for_mask_interruptible(struct ocfs2_mask_waiter *mw, else ret = mw->mw_status; /* Re-arm the completion in case we want to wait on it again */ - INIT_COMPLETION(mw->mw_complete); + reinit_completion(&mw->mw_complete); return ret; } diff --git a/fs/proc/consoles.c b/fs/proc/consoles.c index b701eaa482bf..51942d5abcec 100644 --- a/fs/proc/consoles.c +++ b/fs/proc/consoles.c @@ -29,7 +29,6 @@ static int show_console_dev(struct seq_file *m, void *v) char flags[ARRAY_SIZE(con_flags) + 1]; struct console *con = v; unsigned int a; - int len; dev_t dev = 0; if (con->device) { @@ -47,11 +46,10 @@ static int show_console_dev(struct seq_file *m, void *v) con_flags[a].name : ' '; flags[a] = 0; - seq_printf(m, "%s%d%n", con->name, con->index, &len); - len = 21 - len; - if (len < 1) - len = 1; - seq_printf(m, "%*c%c%c%c (%s)", len, ' ', con->read ? 'R' : '-', + seq_setwidth(m, 21 - 1); + seq_printf(m, "%s%d", con->name, con->index); + seq_pad(m, ' '); + seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-', con->write ? 'W' : '-', con->unblank ? 'U' : '-', flags); if (dev) diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index c805d5b69ba1..a77d2b299199 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -1,8 +1,8 @@ #include <linux/fs.h> -#include <linux/hugetlb.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/mm.h> +#include <linux/hugetlb.h> #include <linux/mman.h> #include <linux/mmzone.h> #include <linux/proc_fs.h> diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c index ccfd99bd1c5a..5f9bc8a746c9 100644 --- a/fs/proc/nommu.c +++ b/fs/proc/nommu.c @@ -39,7 +39,7 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region) unsigned long ino = 0; struct file *file; dev_t dev = 0; - int flags, len; + int flags; flags = region->vm_flags; file = region->vm_file; @@ -50,8 +50,9 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region) ino = inode->i_ino; } + seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); seq_printf(m, - "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", + "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", region->vm_start, region->vm_end, flags & VM_READ ? 'r' : '-', @@ -59,13 +60,10 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region) flags & VM_EXEC ? 'x' : '-', flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', ((loff_t)region->vm_pgoff) << PAGE_SHIFT, - MAJOR(dev), MINOR(dev), ino, &len); + MAJOR(dev), MINOR(dev), ino); if (file) { - len = 25 + sizeof(void *) * 6 - len; - if (len < 1) - len = 1; - seq_printf(m, "%*c", len, ' '); + seq_pad(m, ' '); seq_path(m, &file->f_path, ""); } diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index abbe825d20ff..fb52b548080d 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -62,7 +62,8 @@ void task_mem(struct seq_file *m, struct mm_struct *mm) total_rss << (PAGE_SHIFT-10), data << (PAGE_SHIFT-10), mm->stack_vm << (PAGE_SHIFT-10), text, lib, - (PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10, + (PTRS_PER_PTE * sizeof(pte_t) * + atomic_long_read(&mm->nr_ptes)) >> 10, swap << (PAGE_SHIFT-10)); } @@ -83,14 +84,6 @@ unsigned long task_statm(struct mm_struct *mm, return mm->total_vm; } -static void pad_len_spaces(struct seq_file *m, int len) -{ - len = 25 + sizeof(void*) * 6 - len; - if (len < 1) - len = 1; - seq_printf(m, "%*c", len, ' '); -} - #ifdef CONFIG_NUMA /* * These functions are for numa_maps but called in generic **maps seq_file @@ -268,7 +261,6 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) unsigned long long pgoff = 0; unsigned long start, end; dev_t dev = 0; - int len; const char *name = NULL; if (file) { @@ -286,7 +278,8 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) if (stack_guard_page_end(vma, end)) end -= PAGE_SIZE; - seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", + seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); + seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", start, end, flags & VM_READ ? 'r' : '-', @@ -294,14 +287,14 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) flags & VM_EXEC ? 'x' : '-', flags & VM_MAYSHARE ? 's' : 'p', pgoff, - MAJOR(dev), MINOR(dev), ino, &len); + MAJOR(dev), MINOR(dev), ino); /* * Print the dentry name for named mappings, and a * special [heap] marker for the heap: */ if (file) { - pad_len_spaces(m, len); + seq_pad(m, ' '); seq_path(m, &file->f_path, "\n"); goto done; } @@ -333,7 +326,7 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) name = "[stack]"; } else { /* Thread stack in /proc/PID/maps */ - pad_len_spaces(m, len); + seq_pad(m, ' '); seq_printf(m, "[stack:%d]", tid); } } @@ -341,7 +334,7 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid) done: if (name) { - pad_len_spaces(m, len); + seq_pad(m, ' '); seq_puts(m, name); } seq_putc(m, '\n'); @@ -505,9 +498,9 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, pte_t *pte; spinlock_t *ptl; - if (pmd_trans_huge_lock(pmd, vma) == 1) { + if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { smaps_pte_entry(*(pte_t *)pmd, addr, HPAGE_PMD_SIZE, walk); - spin_unlock(&walk->mm->page_table_lock); + spin_unlock(ptl); mss->anonymous_thp += HPAGE_PMD_SIZE; return 0; } @@ -998,13 +991,14 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, { struct vm_area_struct *vma; struct pagemapread *pm = walk->private; + spinlock_t *ptl; pte_t *pte; int err = 0; pagemap_entry_t pme = make_pme(PM_NOT_PRESENT(pm->v2)); /* find the first VMA at or above 'addr' */ vma = find_vma(walk->mm, addr); - if (vma && pmd_trans_huge_lock(pmd, vma) == 1) { + if (vma && pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { int pmd_flags2; if ((vma->vm_flags & VM_SOFTDIRTY) || pmd_soft_dirty(*pmd)) @@ -1022,7 +1016,7 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end, if (err) break; } - spin_unlock(&walk->mm->page_table_lock); + spin_unlock(ptl); return err; } @@ -1324,7 +1318,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr, md = walk->private; - if (pmd_trans_huge_lock(pmd, md->vma) == 1) { + if (pmd_trans_huge_lock(pmd, md->vma, &ptl) == 1) { pte_t huge_pte = *(pte_t *)pmd; struct page *page; @@ -1332,7 +1326,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr, if (page) gather_stats(page, md, pte_dirty(huge_pte), HPAGE_PMD_SIZE/PAGE_SIZE); - spin_unlock(&walk->mm->page_table_lock); + spin_unlock(ptl); return 0; } diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c index 56123a6f462e..678455d2d683 100644 --- a/fs/proc/task_nommu.c +++ b/fs/proc/task_nommu.c @@ -123,14 +123,6 @@ unsigned long task_statm(struct mm_struct *mm, return size; } -static void pad_len_spaces(struct seq_file *m, int len) -{ - len = 25 + sizeof(void*) * 6 - len; - if (len < 1) - len = 1; - seq_printf(m, "%*c", len, ' '); -} - /* * display a single VMA to a sequenced file */ @@ -142,7 +134,7 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma, unsigned long ino = 0; struct file *file; dev_t dev = 0; - int flags, len; + int flags; unsigned long long pgoff = 0; flags = vma->vm_flags; @@ -155,8 +147,9 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma, pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT; } + seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); seq_printf(m, - "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n", + "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", vma->vm_start, vma->vm_end, flags & VM_READ ? 'r' : '-', @@ -164,16 +157,16 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma, flags & VM_EXEC ? 'x' : '-', flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', pgoff, - MAJOR(dev), MINOR(dev), ino, &len); + MAJOR(dev), MINOR(dev), ino); if (file) { - pad_len_spaces(m, len); + seq_pad(m, ' '); seq_path(m, &file->f_path, ""); } else if (mm) { pid_t tid = vm_is_stack(priv->task, vma, is_pid); if (tid != 0) { - pad_len_spaces(m, len); + seq_pad(m, ' '); /* * Thread stack in /proc/PID/task/TID/maps or * the main process stack. diff --git a/fs/seq_file.c b/fs/seq_file.c index a290157265ef..1cd2388ca5bd 100644 --- a/fs/seq_file.c +++ b/fs/seq_file.c @@ -766,6 +766,21 @@ int seq_write(struct seq_file *seq, const void *data, size_t len) } EXPORT_SYMBOL(seq_write); +/** + * seq_pad - write padding spaces to buffer + * @m: seq_file identifying the buffer to which data should be written + * @c: the byte to append after padding if non-zero + */ +void seq_pad(struct seq_file *m, char c) +{ + int size = m->pad_until - m->count; + if (size > 0) + seq_printf(m, "%*s", size, ""); + if (c) + seq_putc(m, c); +} +EXPORT_SYMBOL(seq_pad); + struct list_head *seq_list_start(struct list_head *head, loff_t pos) { struct list_head *lh; diff --git a/include/linux/cmdline-parser.h b/include/linux/cmdline-parser.h index 98e892ef6d5a..a0f9280421ec 100644 --- a/include/linux/cmdline-parser.h +++ b/include/linux/cmdline-parser.h @@ -8,6 +8,8 @@ #define CMDLINEPARSEH #include <linux/blkdev.h> +#include <linux/fs.h> +#include <linux/slab.h> /* partition flags */ #define PF_RDONLY 0x01 /* Device is read only */ diff --git a/include/linux/completion.h b/include/linux/completion.h index 22c33e35bcb2..5d5aaae3af43 100644 --- a/include/linux/completion.h +++ b/include/linux/completion.h @@ -19,8 +19,8 @@ * * See also: complete(), wait_for_completion() (and friends _timeout, * _interruptible, _interruptible_timeout, and _killable), init_completion(), - * and macros DECLARE_COMPLETION(), DECLARE_COMPLETION_ONSTACK(), and - * INIT_COMPLETION(). + * reinit_completion(), and macros DECLARE_COMPLETION(), + * DECLARE_COMPLETION_ONSTACK(). */ struct completion { unsigned int done; @@ -65,7 +65,7 @@ struct completion { /** * init_completion - Initialize a dynamically allocated completion - * @x: completion structure that is to be initialized + * @x: pointer to completion structure that is to be initialized * * This inline function will initialize a dynamically created completion * structure. @@ -76,6 +76,18 @@ static inline void init_completion(struct completion *x) init_waitqueue_head(&x->wait); } +/** + * reinit_completion - reinitialize a completion structure + * @x: pointer to completion structure that is to be reinitialized + * + * This inline function should be used to reinitialize a completion structure so it can + * be reused. This is especially important after complete_all() is used. + */ +static inline void reinit_completion(struct completion *x) +{ + x->done = 0; +} + extern void wait_for_completion(struct completion *); extern void wait_for_completion_io(struct completion *); extern int wait_for_completion_interruptible(struct completion *x); @@ -94,14 +106,4 @@ extern bool completion_done(struct completion *x); extern void complete(struct completion *); extern void complete_all(struct completion *); -/** - * INIT_COMPLETION - reinitialize a completion structure - * @x: completion structure to be reinitialized - * - * This macro should be used to reinitialize a completion structure so it can - * be reused. This is especially important after complete_all() is used. - */ -#define INIT_COMPLETION(x) ((x).done = 0) - - #endif diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 3935428c57cf..91672e2deec3 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -54,7 +54,8 @@ enum page_check_address_pmd_flag { extern pmd_t *page_check_address_pmd(struct page *page, struct mm_struct *mm, unsigned long address, - enum page_check_address_pmd_flag flag); + enum page_check_address_pmd_flag flag, + spinlock_t **ptl); #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) @@ -129,15 +130,15 @@ extern void __vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, unsigned long end, long adjust_next); -extern int __pmd_trans_huge_lock(pmd_t *pmd, - struct vm_area_struct *vma); +extern int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, + spinlock_t **ptl); /* mmap_sem must be held on entry */ -static inline int pmd_trans_huge_lock(pmd_t *pmd, - struct vm_area_struct *vma) +static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, + spinlock_t **ptl) { VM_BUG_ON(!rwsem_is_locked(&vma->vm_mm->mmap_sem)); if (pmd_trans_huge(*pmd)) - return __pmd_trans_huge_lock(pmd, vma); + return __pmd_trans_huge_lock(pmd, vma, ptl); else return 0; } @@ -215,8 +216,8 @@ static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, long adjust_next) { } -static inline int pmd_trans_huge_lock(pmd_t *pmd, - struct vm_area_struct *vma) +static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, + spinlock_t **ptl) { return 0; } diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 0393270466c3..acd2010328f3 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -392,6 +392,15 @@ static inline int hugepage_migration_support(struct hstate *h) return pmd_huge_support() && (huge_page_shift(h) == PMD_SHIFT); } +static inline spinlock_t *huge_pte_lockptr(struct hstate *h, + struct mm_struct *mm, pte_t *pte) +{ + if (huge_page_size(h) == PMD_SIZE) + return pmd_lockptr(mm, (pmd_t *) pte); + VM_BUG_ON(huge_page_size(h) == PAGE_SIZE); + return &mm->page_table_lock; +} + #else /* CONFIG_HUGETLB_PAGE */ struct hstate {}; #define alloc_huge_page_node(h, nid) NULL @@ -401,6 +410,7 @@ struct hstate {}; #define hstate_sizelog(s) NULL #define hstate_vma(v) NULL #define hstate_inode(i) NULL +#define page_hstate(page) NULL #define huge_page_size(h) PAGE_SIZE #define huge_page_mask(h) PAGE_MASK #define vma_kernel_pagesize(v) PAGE_SIZE @@ -421,6 +431,22 @@ static inline pgoff_t basepage_index(struct page *page) #define dissolve_free_huge_pages(s, e) do {} while (0) #define pmd_huge_support() 0 #define hugepage_migration_support(h) 0 + +static inline spinlock_t *huge_pte_lockptr(struct hstate *h, + struct mm_struct *mm, pte_t *pte) +{ + return &mm->page_table_lock; +} #endif /* CONFIG_HUGETLB_PAGE */ +static inline spinlock_t *huge_pte_lock(struct hstate *h, + struct mm_struct *mm, pte_t *pte) +{ + spinlock_t *ptl; + + ptl = huge_pte_lockptr(h, mm, pte); + spin_lock(ptl); + return ptl; +} + #endif /* _LINUX_HUGETLB_H */ diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index c9e831dc80bc..db43b58a3355 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -11,8 +11,6 @@ #include <linux/irqnr.h> #include <linux/hardirq.h> #include <linux/irqflags.h> -#include <linux/smp.h> -#include <linux/percpu.h> #include <linux/hrtimer.h> #include <linux/kref.h> #include <linux/workqueue.h> @@ -392,15 +390,6 @@ extern void __raise_softirq_irqoff(unsigned int nr); extern void raise_softirq_irqoff(unsigned int nr); extern void raise_softirq(unsigned int nr); -/* This is the worklist that queues up per-cpu softirq work. - * - * send_remote_sendirq() adds work to these lists, and - * the softirq handler itself dequeues from them. The queues - * are protected by disabling local cpu interrupts and they must - * only be accessed by the local cpu that they are for. - */ -DECLARE_PER_CPU(struct list_head [NR_SOFTIRQS], softirq_work_list); - DECLARE_PER_CPU(struct task_struct *, ksoftirqd); static inline struct task_struct *this_cpu_ksoftirqd(void) @@ -408,17 +397,6 @@ static inline struct task_struct *this_cpu_ksoftirqd(void) return this_cpu_read(ksoftirqd); } -/* Try to send a softirq to a remote cpu. If this cannot be done, the - * work will be queued to the local cpu. - */ -extern void send_remote_softirq(struct call_single_data *cp, int cpu, int softirq); - -/* Like send_remote_softirq(), but the caller must disable local cpu interrupts - * and compute the current cpu, passed in as 'this_cpu'. - */ -extern void __send_remote_softirq(struct call_single_data *cp, int cpu, - int this_cpu, int softirq); - /* Tasklets --- multithreaded analogue of BHs. Main feature differing them of generic softirqs: tasklet diff --git a/include/linux/kfifo.h b/include/linux/kfifo.h index 10308c6a3d1c..552d51efb429 100644 --- a/include/linux/kfifo.h +++ b/include/linux/kfifo.h @@ -1,7 +1,7 @@ /* * A generic kernel FIFO implementation * - * Copyright (C) 2009/2010 Stefani Seibold <stefani@seibold.net> + * Copyright (C) 2013 Stefani Seibold <stefani@seibold.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -67,9 +67,10 @@ struct __kfifo { union { \ struct __kfifo kfifo; \ datatype *type; \ + const datatype *const_type; \ char (*rectype)[recsize]; \ ptrtype *ptr; \ - const ptrtype *ptr_const; \ + ptrtype const *ptr_const; \ } #define __STRUCT_KFIFO(type, size, recsize, ptrtype) \ @@ -386,16 +387,12 @@ __kfifo_int_must_check_helper( \ #define kfifo_put(fifo, val) \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ - typeof((val) + 1) __val = (val); \ + typeof(*__tmp->const_type) __val = (val); \ unsigned int __ret; \ - const size_t __recsize = sizeof(*__tmp->rectype); \ + size_t __recsize = sizeof(*__tmp->rectype); \ struct __kfifo *__kfifo = &__tmp->kfifo; \ - if (0) { \ - typeof(__tmp->ptr_const) __dummy __attribute__ ((unused)); \ - __dummy = (typeof(__val))NULL; \ - } \ if (__recsize) \ - __ret = __kfifo_in_r(__kfifo, __val, sizeof(*__val), \ + __ret = __kfifo_in_r(__kfifo, &__val, sizeof(__val), \ __recsize); \ else { \ __ret = !kfifo_is_full(__tmp); \ @@ -404,7 +401,7 @@ __kfifo_int_must_check_helper( \ ((typeof(__tmp->type))__kfifo->data) : \ (__tmp->buf) \ )[__kfifo->in & __tmp->kfifo.mask] = \ - *(typeof(__tmp->type))__val; \ + (typeof(*__tmp->type))__val; \ smp_wmb(); \ __kfifo->in++; \ } \ @@ -415,7 +412,7 @@ __kfifo_int_must_check_helper( \ /** * kfifo_get - get data from the fifo * @fifo: address of the fifo to be used - * @val: the var where to store the data to be added + * @val: address where to store the data * * This macro reads the data from the fifo. * It returns 0 if the fifo was empty. Otherwise it returns the number @@ -428,12 +425,10 @@ __kfifo_int_must_check_helper( \ __kfifo_uint_must_check_helper( \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ - typeof((val) + 1) __val = (val); \ + typeof(__tmp->ptr) __val = (val); \ unsigned int __ret; \ const size_t __recsize = sizeof(*__tmp->rectype); \ struct __kfifo *__kfifo = &__tmp->kfifo; \ - if (0) \ - __val = (typeof(__tmp->ptr))0; \ if (__recsize) \ __ret = __kfifo_out_r(__kfifo, __val, sizeof(*__val), \ __recsize); \ @@ -456,7 +451,7 @@ __kfifo_uint_must_check_helper( \ /** * kfifo_peek - get data from the fifo without removing * @fifo: address of the fifo to be used - * @val: the var where to store the data to be added + * @val: address where to store the data * * This reads the data from the fifo without removing it from the fifo. * It returns 0 if the fifo was empty. Otherwise it returns the number @@ -469,12 +464,10 @@ __kfifo_uint_must_check_helper( \ __kfifo_uint_must_check_helper( \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ - typeof((val) + 1) __val = (val); \ + typeof(__tmp->ptr) __val = (val); \ unsigned int __ret; \ const size_t __recsize = sizeof(*__tmp->rectype); \ struct __kfifo *__kfifo = &__tmp->kfifo; \ - if (0) \ - __val = (typeof(__tmp->ptr))NULL; \ if (__recsize) \ __ret = __kfifo_out_peek_r(__kfifo, __val, sizeof(*__val), \ __recsize); \ @@ -508,14 +501,10 @@ __kfifo_uint_must_check_helper( \ #define kfifo_in(fifo, buf, n) \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ - typeof((buf) + 1) __buf = (buf); \ + typeof(__tmp->ptr_const) __buf = (buf); \ unsigned long __n = (n); \ const size_t __recsize = sizeof(*__tmp->rectype); \ struct __kfifo *__kfifo = &__tmp->kfifo; \ - if (0) { \ - typeof(__tmp->ptr_const) __dummy __attribute__ ((unused)); \ - __dummy = (typeof(__buf))NULL; \ - } \ (__recsize) ?\ __kfifo_in_r(__kfifo, __buf, __n, __recsize) : \ __kfifo_in(__kfifo, __buf, __n); \ @@ -561,14 +550,10 @@ __kfifo_uint_must_check_helper( \ __kfifo_uint_must_check_helper( \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ - typeof((buf) + 1) __buf = (buf); \ + typeof(__tmp->ptr) __buf = (buf); \ unsigned long __n = (n); \ const size_t __recsize = sizeof(*__tmp->rectype); \ struct __kfifo *__kfifo = &__tmp->kfifo; \ - if (0) { \ - typeof(__tmp->ptr) __dummy = NULL; \ - __buf = __dummy; \ - } \ (__recsize) ?\ __kfifo_out_r(__kfifo, __buf, __n, __recsize) : \ __kfifo_out(__kfifo, __buf, __n); \ @@ -773,14 +758,10 @@ __kfifo_uint_must_check_helper( \ __kfifo_uint_must_check_helper( \ ({ \ typeof((fifo) + 1) __tmp = (fifo); \ - typeof((buf) + 1) __buf = (buf); \ + typeof(__tmp->ptr) __buf = (buf); \ unsigned long __n = (n); \ const size_t __recsize = sizeof(*__tmp->rectype); \ struct __kfifo *__kfifo = &__tmp->kfifo; \ - if (0) { \ - typeof(__tmp->ptr) __dummy __attribute__ ((unused)) = NULL; \ - __buf = __dummy; \ - } \ (__recsize) ? \ __kfifo_out_peek_r(__kfifo, __buf, __n, __recsize) : \ __kfifo_out_peek(__kfifo, __buf, __n); \ diff --git a/include/linux/llist.h b/include/linux/llist.h index 8828a78dec9a..fbf10a0bc095 100644 --- a/include/linux/llist.h +++ b/include/linux/llist.h @@ -195,4 +195,6 @@ static inline struct llist_node *llist_del_all(struct llist_head *head) extern struct llist_node *llist_del_first(struct llist_head *head); +struct llist_node *llist_reverse_order(struct llist_node *head); + #endif /* LLIST_H */ diff --git a/include/linux/lockref.h b/include/linux/lockref.h index 13dfd36a3294..c8929c3832db 100644 --- a/include/linux/lockref.h +++ b/include/linux/lockref.h @@ -15,10 +15,15 @@ */ #include <linux/spinlock.h> +#include <generated/bounds.h> + +#define USE_CMPXCHG_LOCKREF \ + (IS_ENABLED(CONFIG_ARCH_USE_CMPXCHG_LOCKREF) && \ + IS_ENABLED(CONFIG_SMP) && !BLOATED_SPINLOCKS) struct lockref { union { -#ifdef CONFIG_CMPXCHG_LOCKREF +#if USE_CMPXCHG_LOCKREF aligned_u64 lock_count; #endif struct { diff --git a/include/linux/mm.h b/include/linux/mm.h index 42a35d94b82c..0548eb201e05 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1316,32 +1316,85 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a } #endif /* CONFIG_MMU && !__ARCH_HAS_4LEVEL_HACK */ -#if USE_SPLIT_PTLOCKS -/* - * We tuck a spinlock to guard each pagetable page into its struct page, - * at page->private, with BUILD_BUG_ON to make sure that this will not - * overflow into the next struct page (as it might with DEBUG_SPINLOCK). - * When freeing, reset page->mapping so free_pages_check won't complain. - */ -#define __pte_lockptr(page) &((page)->ptl) -#define pte_lock_init(_page) do { \ - spin_lock_init(__pte_lockptr(_page)); \ -} while (0) -#define pte_lock_deinit(page) ((page)->mapping = NULL) -#define pte_lockptr(mm, pmd) ({(void)(mm); __pte_lockptr(pmd_page(*(pmd)));}) -#else /* !USE_SPLIT_PTLOCKS */ +#if USE_SPLIT_PTE_PTLOCKS +#if BLOATED_SPINLOCKS +void __init ptlock_cache_init(void); +extern bool ptlock_alloc(struct page *page); +extern void ptlock_free(struct page *page); + +static inline spinlock_t *ptlock_ptr(struct page *page) +{ + return page->ptl; +} +#else /* BLOATED_SPINLOCKS */ +static inline void ptlock_cache_init(void) {} +static inline bool ptlock_alloc(struct page *page) +{ + return true; +} + +static inline void ptlock_free(struct page *page) +{ +} + +static inline spinlock_t *ptlock_ptr(struct page *page) +{ + return &page->ptl; +} +#endif /* BLOATED_SPINLOCKS */ + +static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd) +{ + return ptlock_ptr(pmd_page(*pmd)); +} + +static inline bool ptlock_init(struct page *page) +{ + /* + * prep_new_page() initialize page->private (and therefore page->ptl) + * with 0. Make sure nobody took it in use in between. + * + * It can happen if arch try to use slab for page table allocation: + * slab code uses page->slab_cache and page->first_page (for tail + * pages), which share storage with page->ptl. + */ + VM_BUG_ON(*(unsigned long *)&page->ptl); + if (!ptlock_alloc(page)) + return false; + spin_lock_init(ptlock_ptr(page)); + return true; +} + +/* Reset page->mapping so free_pages_check won't complain. */ +static inline void pte_lock_deinit(struct page *page) +{ + page->mapping = NULL; + ptlock_free(page); +} + +#else /* !USE_SPLIT_PTE_PTLOCKS */ /* * We use mm->page_table_lock to guard all pagetable pages of the mm. */ -#define pte_lock_init(page) do {} while (0) -#define pte_lock_deinit(page) do {} while (0) -#define pte_lockptr(mm, pmd) ({(void)(pmd); &(mm)->page_table_lock;}) -#endif /* USE_SPLIT_PTLOCKS */ +static inline spinlock_t *pte_lockptr(struct mm_struct *mm, pmd_t *pmd) +{ + return &mm->page_table_lock; +} +static inline void ptlock_cache_init(void) {} +static inline bool ptlock_init(struct page *page) { return true; } +static inline void pte_lock_deinit(struct page *page) {} +#endif /* USE_SPLIT_PTE_PTLOCKS */ + +static inline void pgtable_init(void) +{ + ptlock_cache_init(); + pgtable_cache_init(); +} -static inline void pgtable_page_ctor(struct page *page) +static inline bool pgtable_page_ctor(struct page *page) { - pte_lock_init(page); inc_zone_page_state(page, NR_PAGETABLE); + return ptlock_init(page); } static inline void pgtable_page_dtor(struct page *page) @@ -1378,6 +1431,52 @@ static inline void pgtable_page_dtor(struct page *page) ((unlikely(pmd_none(*(pmd))) && __pte_alloc_kernel(pmd, address))? \ NULL: pte_offset_kernel(pmd, address)) +#if USE_SPLIT_PMD_PTLOCKS + +static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd) +{ + return ptlock_ptr(virt_to_page(pmd)); +} + +static inline bool pgtable_pmd_page_ctor(struct page *page) +{ +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + page->pmd_huge_pte = NULL; +#endif + return ptlock_init(page); +} + +static inline void pgtable_pmd_page_dtor(struct page *page) +{ +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + VM_BUG_ON(page->pmd_huge_pte); +#endif + ptlock_free(page); +} + +#define pmd_huge_pte(mm, pmd) (virt_to_page(pmd)->pmd_huge_pte) + +#else + +static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd) +{ + return &mm->page_table_lock; +} + +static inline bool pgtable_pmd_page_ctor(struct page *page) { return true; } +static inline void pgtable_pmd_page_dtor(struct page *page) {} + +#define pmd_huge_pte(mm, pmd) ((mm)->pmd_huge_pte) + +#endif + +static inline spinlock_t *pmd_lock(struct mm_struct *mm, pmd_t *pmd) +{ + spinlock_t *ptl = pmd_lockptr(mm, pmd); + spin_lock(ptl); + return ptl; +} + extern void free_area_init(unsigned long * zones_size); extern void free_area_init_node(int nid, unsigned long * zones_size, unsigned long zone_start_pfn, unsigned long *zholes_size); diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index a3198e5aaf4e..10f5a7272b80 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -23,7 +23,9 @@ struct address_space; -#define USE_SPLIT_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS) +#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS) +#define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \ + IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK)) /* * Each physical page in the system has a struct page associated with @@ -63,6 +65,9 @@ struct page { * this page is only used to * free other pages. */ +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && USE_SPLIT_PMD_PTLOCKS + pgtable_t pmd_huge_pte; /* protected by page->ptl */ +#endif }; union { @@ -141,9 +146,13 @@ struct page { * indicates order in the buddy * system if PG_buddy is set. */ -#if USE_SPLIT_PTLOCKS +#if USE_SPLIT_PTE_PTLOCKS +#if BLOATED_SPINLOCKS + spinlock_t *ptl; +#else spinlock_t ptl; #endif +#endif struct kmem_cache *slab_cache; /* SL[AU]B: Pointer to slab */ struct page *first_page; /* Compound tail pages */ }; @@ -309,14 +318,14 @@ enum { NR_MM_COUNTERS }; -#if USE_SPLIT_PTLOCKS && defined(CONFIG_MMU) +#if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU) #define SPLIT_RSS_COUNTING /* per-thread cached information, */ struct task_rss_stat { int events; /* for synchronization threshold */ int count[NR_MM_COUNTERS]; }; -#endif /* USE_SPLIT_PTLOCKS */ +#endif /* USE_SPLIT_PTE_PTLOCKS */ struct mm_rss_stat { atomic_long_t count[NR_MM_COUNTERS]; @@ -339,6 +348,7 @@ struct mm_struct { pgd_t * pgd; atomic_t mm_users; /* How many users with user space? */ atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */ + atomic_long_t nr_ptes; /* Page table pages */ int map_count; /* number of VMAs */ spinlock_t page_table_lock; /* Protects page tables and some counters */ @@ -360,7 +370,6 @@ struct mm_struct { unsigned long exec_vm; /* VM_EXEC & ~VM_WRITE */ unsigned long stack_vm; /* VM_GROWSUP/DOWN */ unsigned long def_flags; - unsigned long nr_ptes; /* Page table pages */ unsigned long start_code, end_code, start_data, end_data; unsigned long start_brk, brk, start_stack; unsigned long arg_start, arg_end, env_start, env_end; @@ -406,7 +415,7 @@ struct mm_struct { #ifdef CONFIG_MMU_NOTIFIER struct mmu_notifier_mm *mmu_notifier_mm; #endif -#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS pgtable_t pmd_huge_pte; /* protected by page_table_lock */ #endif #ifdef CONFIG_CPUMASK_OFFSTACK diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 4e32edc8f506..52e0097f61f0 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -20,6 +20,7 @@ struct seq_file { size_t size; size_t from; size_t count; + size_t pad_until; loff_t index; loff_t read_pos; u64 version; @@ -79,6 +80,20 @@ static inline void seq_commit(struct seq_file *m, int num) } } +/** + * seq_setwidth - set padding width + * @m: the seq_file handle + * @size: the max number of bytes to pad. + * + * Call seq_setwidth() for setting max width, then call seq_printf() etc. and + * finally call seq_pad() to pad the remaining bytes. + */ +static inline void seq_setwidth(struct seq_file *m, size_t size) +{ + m->pad_until = m->count + size; +} +void seq_pad(struct seq_file *m, char c); + char *mangle_path(char *s, const char *p, const char *esc); int seq_open(struct file *, const struct seq_operations *); ssize_t seq_read(struct file *, char __user *, size_t, loff_t *); diff --git a/include/linux/smp.h b/include/linux/smp.h index 731f5237d5f4..5da22ee42e16 100644 --- a/include/linux/smp.h +++ b/include/linux/smp.h @@ -49,6 +49,9 @@ void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info), smp_call_func_t func, void *info, bool wait, gfp_t gfp_flags); +void __smp_call_function_single(int cpuid, struct call_single_data *data, + int wait); + #ifdef CONFIG_SMP #include <linux/preempt.h> @@ -95,9 +98,6 @@ int smp_call_function(smp_call_func_t func, void *info, int wait); void smp_call_function_many(const struct cpumask *mask, smp_call_func_t func, void *info, bool wait); -void __smp_call_function_single(int cpuid, struct call_single_data *data, - int wait); - int smp_call_function_any(const struct cpumask *mask, smp_call_func_t func, void *info, int wait); @@ -106,14 +106,10 @@ void kick_all_cpus_sync(void); /* * Generic and arch helpers */ -#ifdef CONFIG_USE_GENERIC_SMP_HELPERS void __init call_function_init(void); void generic_smp_call_function_single_interrupt(void); #define generic_smp_call_function_interrupt \ generic_smp_call_function_single_interrupt -#else -static inline void call_function_init(void) { } -#endif /* * Mark the boot cpu "online" so that it can call console drivers in @@ -155,12 +151,6 @@ smp_call_function_any(const struct cpumask *mask, smp_call_func_t func, static inline void kick_all_cpus_sync(void) { } -static inline void __smp_call_function_single(int cpuid, - struct call_single_data *data, int wait) -{ - on_each_cpu(data->func, data->info, wait); -} - #endif /* !SMP */ /* diff --git a/include/linux/swapops.h b/include/linux/swapops.h index 8d4fa82bfb91..c0f75261a728 100644 --- a/include/linux/swapops.h +++ b/include/linux/swapops.h @@ -139,7 +139,8 @@ static inline void make_migration_entry_read(swp_entry_t *entry) extern void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd, unsigned long address); -extern void migration_entry_wait_huge(struct mm_struct *mm, pte_t *pte); +extern void migration_entry_wait_huge(struct vm_area_struct *vma, + struct mm_struct *mm, pte_t *pte); #else #define make_migration_entry(page, write) swp_entry(0, 0) @@ -151,8 +152,8 @@ static inline int is_migration_entry(swp_entry_t swp) static inline void make_migration_entry_read(swp_entry_t *entryp) { } static inline void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd, unsigned long address) { } -static inline void migration_entry_wait_huge(struct mm_struct *mm, - pte_t *pte) { } +static inline void migration_entry_wait_huge(struct vm_area_struct *vma, + struct mm_struct *mm, pte_t *pte) { } static inline int is_write_migration_entry(swp_entry_t entry) { return 0; diff --git a/init/main.c b/init/main.c index 6ad1a533a8c7..5f191133376f 100644 --- a/init/main.c +++ b/init/main.c @@ -473,7 +473,7 @@ static void __init mm_init(void) mem_init(); kmem_cache_init(); percpu_init_late(); - pgtable_cache_init(); + pgtable_init(); vmalloc_init(); } diff --git a/kernel/Kconfig.hz b/kernel/Kconfig.hz index 94fabd534b03..2a202a846757 100644 --- a/kernel/Kconfig.hz +++ b/kernel/Kconfig.hz @@ -55,4 +55,4 @@ config HZ default 1000 if HZ_1000 config SCHED_HRTICK - def_bool HIGH_RES_TIMERS && (!SMP || USE_GENERIC_SMP_HELPERS) + def_bool HIGH_RES_TIMERS diff --git a/kernel/bounds.c b/kernel/bounds.c index e8ca97b5c386..578782ef6ae1 100644 --- a/kernel/bounds.c +++ b/kernel/bounds.c @@ -11,6 +11,7 @@ #include <linux/kbuild.h> #include <linux/page_cgroup.h> #include <linux/log2.h> +#include <linux/spinlock.h> void foo(void) { @@ -21,5 +22,6 @@ void foo(void) #ifdef CONFIG_SMP DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS)); #endif + DEFINE(BLOATED_SPINLOCKS, sizeof(spinlock_t) > sizeof(int)); /* End of constants */ } diff --git a/kernel/fork.c b/kernel/fork.c index f6d11fc67f72..728d5be9548c 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -532,7 +532,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p) mm->flags = (current->mm) ? (current->mm->flags & MMF_INIT_MASK) : default_dump_filter; mm->core_state = NULL; - mm->nr_ptes = 0; + atomic_long_set(&mm->nr_ptes, 0); memset(&mm->rss_stat, 0, sizeof(mm->rss_stat)); spin_lock_init(&mm->page_table_lock); mm_init_aio(mm); @@ -560,7 +560,7 @@ static void check_mm(struct mm_struct *mm) "mm:%p idx:%d val:%ld\n", mm, i, x); } -#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS VM_BUG_ON(mm->pmd_huge_pte); #endif } @@ -814,7 +814,7 @@ struct mm_struct *dup_mm(struct task_struct *tsk) memcpy(mm, oldmm, sizeof(*mm)); mm_init_cpumask(mm); -#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS mm->pmd_huge_pte = NULL; #endif if (!mm_init(mm, tsk)) diff --git a/kernel/smp.c b/kernel/smp.c index 46116100f0ee..bd9f94028838 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -15,7 +15,6 @@ #include "smpboot.h" -#ifdef CONFIG_USE_GENERIC_SMP_HELPERS enum { CSD_FLAG_LOCK = 0x01, CSD_FLAG_WAIT = 0x02, @@ -140,8 +139,7 @@ static void csd_unlock(struct call_single_data *csd) * for execution on the given CPU. data must already have * ->func, ->info, and ->flags set. */ -static -void generic_exec_single(int cpu, struct call_single_data *csd, int wait) +static void generic_exec_single(int cpu, struct call_single_data *csd, int wait) { struct call_single_queue *dst = &per_cpu(call_single_queue, cpu); unsigned long flags; @@ -464,7 +462,6 @@ int smp_call_function(smp_call_func_t func, void *info, int wait) return 0; } EXPORT_SYMBOL(smp_call_function); -#endif /* USE_GENERIC_SMP_HELPERS */ /* Setup configured maximum number of CPUs to activate */ unsigned int setup_max_cpus = NR_CPUS; diff --git a/kernel/softirq.c b/kernel/softirq.c index b24988353458..11025ccc06dd 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -6,8 +6,6 @@ * Distribute under GPLv2. * * Rewritten. Old one was good in 2.2, but in 2.3 it was immoral. --ANK (990903) - * - * Remote softirq infrastructure is by Jens Axboe. */ #include <linux/export.h> @@ -627,146 +625,17 @@ void tasklet_hrtimer_init(struct tasklet_hrtimer *ttimer, } EXPORT_SYMBOL_GPL(tasklet_hrtimer_init); -/* - * Remote softirq bits - */ - -DEFINE_PER_CPU(struct list_head [NR_SOFTIRQS], softirq_work_list); -EXPORT_PER_CPU_SYMBOL(softirq_work_list); - -static void __local_trigger(struct call_single_data *cp, int softirq) -{ - struct list_head *head = &__get_cpu_var(softirq_work_list[softirq]); - - list_add_tail(&cp->list, head); - - /* Trigger the softirq only if the list was previously empty. */ - if (head->next == &cp->list) - raise_softirq_irqoff(softirq); -} - -#ifdef CONFIG_USE_GENERIC_SMP_HELPERS -static void remote_softirq_receive(void *data) -{ - struct call_single_data *cp = data; - unsigned long flags; - int softirq; - - softirq = *(int *)cp->info; - local_irq_save(flags); - __local_trigger(cp, softirq); - local_irq_restore(flags); -} - -static int __try_remote_softirq(struct call_single_data *cp, int cpu, int softirq) -{ - if (cpu_online(cpu)) { - cp->func = remote_softirq_receive; - cp->info = &softirq; - cp->flags = 0; - - __smp_call_function_single(cpu, cp, 0); - return 0; - } - return 1; -} -#else /* CONFIG_USE_GENERIC_SMP_HELPERS */ -static int __try_remote_softirq(struct call_single_data *cp, int cpu, int softirq) -{ - return 1; -} -#endif - -/** - * __send_remote_softirq - try to schedule softirq work on a remote cpu - * @cp: private SMP call function data area - * @cpu: the remote cpu - * @this_cpu: the currently executing cpu - * @softirq: the softirq for the work - * - * Attempt to schedule softirq work on a remote cpu. If this cannot be - * done, the work is instead queued up on the local cpu. - * - * Interrupts must be disabled. - */ -void __send_remote_softirq(struct call_single_data *cp, int cpu, int this_cpu, int softirq) -{ - if (cpu == this_cpu || __try_remote_softirq(cp, cpu, softirq)) - __local_trigger(cp, softirq); -} -EXPORT_SYMBOL(__send_remote_softirq); - -/** - * send_remote_softirq - try to schedule softirq work on a remote cpu - * @cp: private SMP call function data area - * @cpu: the remote cpu - * @softirq: the softirq for the work - * - * Like __send_remote_softirq except that disabling interrupts and - * computing the current cpu is done for the caller. - */ -void send_remote_softirq(struct call_single_data *cp, int cpu, int softirq) -{ - unsigned long flags; - int this_cpu; - - local_irq_save(flags); - this_cpu = smp_processor_id(); - __send_remote_softirq(cp, cpu, this_cpu, softirq); - local_irq_restore(flags); -} -EXPORT_SYMBOL(send_remote_softirq); - -static int remote_softirq_cpu_notify(struct notifier_block *self, - unsigned long action, void *hcpu) -{ - /* - * If a CPU goes away, splice its entries to the current CPU - * and trigger a run of the softirq - */ - if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) { - int cpu = (unsigned long) hcpu; - int i; - - local_irq_disable(); - for (i = 0; i < NR_SOFTIRQS; i++) { - struct list_head *head = &per_cpu(softirq_work_list[i], cpu); - struct list_head *local_head; - - if (list_empty(head)) - continue; - - local_head = &__get_cpu_var(softirq_work_list[i]); - list_splice_init(head, local_head); - raise_softirq_irqoff(i); - } - local_irq_enable(); - } - - return NOTIFY_OK; -} - -static struct notifier_block remote_softirq_cpu_notifier = { - .notifier_call = remote_softirq_cpu_notify, -}; - void __init softirq_init(void) { int cpu; for_each_possible_cpu(cpu) { - int i; - per_cpu(tasklet_vec, cpu).tail = &per_cpu(tasklet_vec, cpu).head; per_cpu(tasklet_hi_vec, cpu).tail = &per_cpu(tasklet_hi_vec, cpu).head; - for (i = 0; i < NR_SOFTIRQS; i++) - INIT_LIST_HEAD(&per_cpu(softirq_work_list[i], cpu)); } - register_hotcpu_notifier(&remote_softirq_cpu_notifier); - open_softirq(TASKLET_SOFTIRQ, tasklet_action); open_softirq(HI_SOFTIRQ, tasklet_hi_action); } diff --git a/kernel/up.c b/kernel/up.c index 630d72bf7e41..509403e3fbc6 100644 --- a/kernel/up.c +++ b/kernel/up.c @@ -22,6 +22,17 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, } EXPORT_SYMBOL(smp_call_function_single); +void __smp_call_function_single(int cpu, struct call_single_data *csd, + int wait) +{ + unsigned long flags; + + local_irq_save(flags); + csd->func(csd->info); + local_irq_restore(flags); +} +EXPORT_SYMBOL(__smp_call_function_single); + int on_each_cpu(smp_call_func_t func, void *info, int wait) { unsigned long flags; diff --git a/lib/Kconfig b/lib/Kconfig index 75485e163ca3..06dc74200a51 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -51,13 +51,6 @@ config PERCPU_RWSEM config ARCH_USE_CMPXCHG_LOCKREF bool -config CMPXCHG_LOCKREF - def_bool y if ARCH_USE_CMPXCHG_LOCKREF - depends on SMP - depends on !GENERIC_LOCKBREAK - depends on !DEBUG_SPINLOCK - depends on !DEBUG_LOCK_ALLOC - config CRC_CCITT tristate "CRC-CCITT functions" help diff --git a/lib/kfifo.c b/lib/kfifo.c index 7b7f83027b7b..d79b9d222065 100644 --- a/lib/kfifo.c +++ b/lib/kfifo.c @@ -215,7 +215,7 @@ static unsigned long kfifo_copy_from_user(struct __kfifo *fifo, * incrementing the fifo->in index counter */ smp_wmb(); - *copied = len - ret; + *copied = len - ret * esize; /* return the number of elements which are not copied */ return ret; } @@ -275,7 +275,7 @@ static unsigned long kfifo_copy_to_user(struct __kfifo *fifo, void __user *to, * incrementing the fifo->out index counter */ smp_wmb(); - *copied = len - ret; + *copied = len - ret * esize; /* return the number of elements which are not copied */ return ret; } diff --git a/lib/llist.c b/lib/llist.c index 4a70d120138c..f76196d07409 100644 --- a/lib/llist.c +++ b/lib/llist.c @@ -81,3 +81,25 @@ struct llist_node *llist_del_first(struct llist_head *head) return entry; } EXPORT_SYMBOL_GPL(llist_del_first); + +/** + * llist_reverse_order - reverse order of a llist chain + * @head: first item of the list to be reversed + * + * Reverse the order of a chain of llist entries and return the + * new first entry. + */ +struct llist_node *llist_reverse_order(struct llist_node *head) +{ + struct llist_node *new_head = NULL; + + while (head) { + struct llist_node *tmp = head; + head = head->next; + tmp->next = new_head; + new_head = tmp; + } + + return new_head; +} +EXPORT_SYMBOL_GPL(llist_reverse_order); diff --git a/lib/lockref.c b/lib/lockref.c index af6e95d0bed6..d2b123f8456b 100644 --- a/lib/lockref.c +++ b/lib/lockref.c @@ -1,7 +1,7 @@ #include <linux/export.h> #include <linux/lockref.h> -#ifdef CONFIG_CMPXCHG_LOCKREF +#if USE_CMPXCHG_LOCKREF /* * Allow weakly-ordered memory architectures to provide barrier-less diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 48586ac3a62e..10909c571494 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1712,18 +1712,16 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) break; case FORMAT_TYPE_NRCHARS: { - u8 qualifier = spec.qualifier; + /* + * Since %n poses a greater security risk than + * utility, ignore %n and skip its argument. + */ + void *skip_arg; - if (qualifier == 'l') { - long *ip = va_arg(args, long *); - *ip = (str - buf); - } else if (_tolower(qualifier) == 'z') { - size_t *ip = va_arg(args, size_t *); - *ip = (str - buf); - } else { - int *ip = va_arg(args, int *); - *ip = (str - buf); - } + WARN_ONCE(1, "Please remove ignored %%n in '%s'\n", + old_fmt); + + skip_arg = va_arg(args, void *); break; } diff --git a/mm/Kconfig b/mm/Kconfig index 3f4ffda152bb..de31af256207 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -218,9 +218,11 @@ config SPLIT_PTLOCK_CPUS int default "999999" if ARM && !CPU_CACHE_VIPT default "999999" if PARISC && !PA20 - default "999999" if DEBUG_SPINLOCK || DEBUG_LOCK_ALLOC default "4" +config ARCH_ENABLE_SPLIT_PMD_PTLOCK + boolean + # # support for memory balloon compaction config BALLOON_COMPACTION diff --git a/mm/filemap.c b/mm/filemap.c index ae4846ff4849..b7749a92021c 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1090,7 +1090,6 @@ static void shrink_readahead_size_eio(struct file *filp, * @filp: the file to read * @ppos: current file position * @desc: read_descriptor - * @actor: read method * * This is a generic file read routine, and uses the * mapping->a_ops->readpage() function for the actual low-level stuff. @@ -1099,7 +1098,7 @@ static void shrink_readahead_size_eio(struct file *filp, * of the logic when it comes to error handling etc. */ static void do_generic_file_read(struct file *filp, loff_t *ppos, - read_descriptor_t *desc, read_actor_t actor) + read_descriptor_t *desc) { struct address_space *mapping = filp->f_mapping; struct inode *inode = mapping->host; @@ -1200,13 +1199,14 @@ page_ok: * Ok, we have the page, and it's up-to-date, so * now we can copy it to user space... * - * The actor routine returns how many bytes were actually used.. + * The file_read_actor routine returns how many bytes were + * actually used.. * NOTE! This may not be the same as how much of a user buffer * we filled up (we may be padding etc), so we can only update * "pos" here (the actor routine has to update the user buffer * pointers and the remaining count). */ - ret = actor(desc, page, offset, nr); + ret = file_read_actor(desc, page, offset, nr); offset += ret; index += offset >> PAGE_CACHE_SHIFT; offset &= ~PAGE_CACHE_MASK; @@ -1479,7 +1479,7 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov, if (desc.count == 0) continue; desc.error = 0; - do_generic_file_read(filp, ppos, &desc, file_read_actor); + do_generic_file_read(filp, ppos, &desc); retval += desc.written; if (desc.error) { retval = retval ?: desc.error; diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 0556c6a44959..bccd5a628ea6 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -710,6 +710,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm, struct page *page) { pgtable_t pgtable; + spinlock_t *ptl; VM_BUG_ON(!PageCompound(page)); pgtable = pte_alloc_one(mm, haddr); @@ -724,9 +725,9 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm, */ __SetPageUptodate(page); - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (unlikely(!pmd_none(*pmd))) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mem_cgroup_uncharge_page(page); put_page(page); pte_free(mm, pgtable); @@ -738,8 +739,8 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm, pgtable_trans_huge_deposit(mm, pmd, pgtable); set_pmd_at(mm, haddr, pmd, entry); add_mm_counter(mm, MM_ANONPAGES, HPAGE_PMD_NR); - mm->nr_ptes++; - spin_unlock(&mm->page_table_lock); + atomic_long_inc(&mm->nr_ptes); + spin_unlock(ptl); } return 0; @@ -759,6 +760,7 @@ static inline struct page *alloc_hugepage_vma(int defrag, HPAGE_PMD_ORDER, vma, haddr, nd); } +/* Caller must hold page table lock. */ static bool set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm, struct vm_area_struct *vma, unsigned long haddr, pmd_t *pmd, struct page *zero_page) @@ -771,7 +773,7 @@ static bool set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm, entry = pmd_mkhuge(entry); pgtable_trans_huge_deposit(mm, pmd, pgtable); set_pmd_at(mm, haddr, pmd, entry); - mm->nr_ptes++; + atomic_long_inc(&mm->nr_ptes); return true; } @@ -790,6 +792,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma, return VM_FAULT_OOM; if (!(flags & FAULT_FLAG_WRITE) && transparent_hugepage_use_zero_page()) { + spinlock_t *ptl; pgtable_t pgtable; struct page *zero_page; bool set; @@ -802,10 +805,10 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma, count_vm_event(THP_FAULT_FALLBACK); return VM_FAULT_FALLBACK; } - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); set = set_huge_zero_page(pgtable, mm, vma, haddr, pmd, zero_page); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); if (!set) { pte_free(mm, pgtable); put_huge_zero_page(); @@ -838,6 +841,7 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr, struct vm_area_struct *vma) { + spinlock_t *dst_ptl, *src_ptl; struct page *src_page; pmd_t pmd; pgtable_t pgtable; @@ -848,8 +852,9 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, if (unlikely(!pgtable)) goto out; - spin_lock(&dst_mm->page_table_lock); - spin_lock_nested(&src_mm->page_table_lock, SINGLE_DEPTH_NESTING); + dst_ptl = pmd_lock(dst_mm, dst_pmd); + src_ptl = pmd_lockptr(src_mm, src_pmd); + spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING); ret = -EAGAIN; pmd = *src_pmd; @@ -858,7 +863,7 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, goto out_unlock; } /* - * mm->page_table_lock is enough to be sure that huge zero pmd is not + * When page table lock is held, the huge zero pmd should not be * under splitting since we don't split the page itself, only pmd to * a page table. */ @@ -879,8 +884,8 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, } if (unlikely(pmd_trans_splitting(pmd))) { /* split huge page running from under us */ - spin_unlock(&src_mm->page_table_lock); - spin_unlock(&dst_mm->page_table_lock); + spin_unlock(src_ptl); + spin_unlock(dst_ptl); pte_free(dst_mm, pgtable); wait_split_huge_page(vma->anon_vma, src_pmd); /* src_vma */ @@ -896,12 +901,12 @@ int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm, pmd = pmd_mkold(pmd_wrprotect(pmd)); pgtable_trans_huge_deposit(dst_mm, dst_pmd, pgtable); set_pmd_at(dst_mm, addr, dst_pmd, pmd); - dst_mm->nr_ptes++; + atomic_long_inc(&dst_mm->nr_ptes); ret = 0; out_unlock: - spin_unlock(&src_mm->page_table_lock); - spin_unlock(&dst_mm->page_table_lock); + spin_unlock(src_ptl); + spin_unlock(dst_ptl); out: return ret; } @@ -912,10 +917,11 @@ void huge_pmd_set_accessed(struct mm_struct *mm, pmd_t *pmd, pmd_t orig_pmd, int dirty) { + spinlock_t *ptl; pmd_t entry; unsigned long haddr; - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (unlikely(!pmd_same(*pmd, orig_pmd))) goto unlock; @@ -925,13 +931,14 @@ void huge_pmd_set_accessed(struct mm_struct *mm, update_mmu_cache_pmd(vma, address, pmd); unlock: - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); } static int do_huge_pmd_wp_zero_page_fallback(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, pmd_t orig_pmd, unsigned long haddr) { + spinlock_t *ptl; pgtable_t pgtable; pmd_t _pmd; struct page *page; @@ -958,7 +965,7 @@ static int do_huge_pmd_wp_zero_page_fallback(struct mm_struct *mm, mmun_end = haddr + HPAGE_PMD_SIZE; mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (unlikely(!pmd_same(*pmd, orig_pmd))) goto out_free_page; @@ -985,7 +992,7 @@ static int do_huge_pmd_wp_zero_page_fallback(struct mm_struct *mm, } smp_wmb(); /* make pte visible before pmd */ pmd_populate(mm, pmd, pgtable); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); put_huge_zero_page(); inc_mm_counter(mm, MM_ANONPAGES); @@ -995,7 +1002,7 @@ static int do_huge_pmd_wp_zero_page_fallback(struct mm_struct *mm, out: return ret; out_free_page: - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); mem_cgroup_uncharge_page(page); put_page(page); @@ -1009,6 +1016,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, struct page *page, unsigned long haddr) { + spinlock_t *ptl; pgtable_t pgtable; pmd_t _pmd; int ret = 0, i; @@ -1055,7 +1063,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, mmun_end = haddr + HPAGE_PMD_SIZE; mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (unlikely(!pmd_same(*pmd, orig_pmd))) goto out_free_pages; VM_BUG_ON(!PageHead(page)); @@ -1081,7 +1089,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, smp_wmb(); /* make pte visible before pmd */ pmd_populate(mm, pmd, pgtable); page_remove_rmap(page); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); @@ -1092,7 +1100,7 @@ out: return ret; out_free_pages: - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); mem_cgroup_uncharge_start(); for (i = 0; i < HPAGE_PMD_NR; i++) { @@ -1107,17 +1115,19 @@ out_free_pages: int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, pmd_t orig_pmd) { + spinlock_t *ptl; int ret = 0; struct page *page = NULL, *new_page; unsigned long haddr; unsigned long mmun_start; /* For mmu_notifiers */ unsigned long mmun_end; /* For mmu_notifiers */ + ptl = pmd_lockptr(mm, pmd); VM_BUG_ON(!vma->anon_vma); haddr = address & HPAGE_PMD_MASK; if (is_huge_zero_pmd(orig_pmd)) goto alloc; - spin_lock(&mm->page_table_lock); + spin_lock(ptl); if (unlikely(!pmd_same(*pmd, orig_pmd))) goto out_unlock; @@ -1133,7 +1143,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, goto out_unlock; } get_page(page); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); alloc: if (transparent_hugepage_enabled(vma) && !transparent_hugepage_debug_cow()) @@ -1180,11 +1190,11 @@ alloc: mmun_end = haddr + HPAGE_PMD_SIZE; mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); - spin_lock(&mm->page_table_lock); + spin_lock(ptl); if (page) put_page(page); if (unlikely(!pmd_same(*pmd, orig_pmd))) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mem_cgroup_uncharge_page(new_page); put_page(new_page); goto out_mn; @@ -1206,13 +1216,13 @@ alloc: } ret |= VM_FAULT_WRITE; } - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); out_mn: mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); out: return ret; out_unlock: - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); return ret; } @@ -1224,7 +1234,7 @@ struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, struct mm_struct *mm = vma->vm_mm; struct page *page = NULL; - assert_spin_locked(&mm->page_table_lock); + assert_spin_locked(pmd_lockptr(mm, pmd)); if (flags & FOLL_WRITE && !pmd_write(*pmd)) goto out; @@ -1271,6 +1281,7 @@ out: int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr, pmd_t pmd, pmd_t *pmdp) { + spinlock_t *ptl; struct anon_vma *anon_vma = NULL; struct page *page; unsigned long haddr = addr & HPAGE_PMD_MASK; @@ -1280,7 +1291,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, bool migrated = false; int flags = 0; - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmdp); if (unlikely(!pmd_same(pmd, *pmdp))) goto out_unlock; @@ -1318,7 +1329,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, * relock and check_same as the page may no longer be mapped. * As the fault is being retried, do not account for it. */ - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); wait_on_page_locked(page); page_nid = -1; goto out; @@ -1326,13 +1337,13 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, /* Page is misplaced, serialise migrations and parallel THP splits */ get_page(page); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); if (!page_locked) lock_page(page); anon_vma = page_lock_anon_vma_read(page); /* Confirm the PMD did not change while page_table_lock was released */ - spin_lock(&mm->page_table_lock); + spin_lock(ptl); if (unlikely(!pmd_same(pmd, *pmdp))) { unlock_page(page); put_page(page); @@ -1344,7 +1355,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, * Migrate the THP to the requested node, returns with page unlocked * and pmd_numa cleared. */ - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); migrated = migrate_misplaced_transhuge_page(mm, vma, pmdp, pmd, addr, page, target_nid); if (migrated) { @@ -1361,7 +1372,7 @@ clear_pmdnuma: update_mmu_cache_pmd(vma, addr, pmdp); unlock_page(page); out_unlock: - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); out: if (anon_vma) @@ -1376,9 +1387,10 @@ out: int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr) { + spinlock_t *ptl; int ret = 0; - if (__pmd_trans_huge_lock(pmd, vma) == 1) { + if (__pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { struct page *page; pgtable_t pgtable; pmd_t orig_pmd; @@ -1392,8 +1404,8 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, tlb_remove_pmd_tlb_entry(tlb, pmd, addr); pgtable = pgtable_trans_huge_withdraw(tlb->mm, pmd); if (is_huge_zero_pmd(orig_pmd)) { - tlb->mm->nr_ptes--; - spin_unlock(&tlb->mm->page_table_lock); + atomic_long_dec(&tlb->mm->nr_ptes); + spin_unlock(ptl); put_huge_zero_page(); } else { page = pmd_page(orig_pmd); @@ -1401,8 +1413,8 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, VM_BUG_ON(page_mapcount(page) < 0); add_mm_counter(tlb->mm, MM_ANONPAGES, -HPAGE_PMD_NR); VM_BUG_ON(!PageHead(page)); - tlb->mm->nr_ptes--; - spin_unlock(&tlb->mm->page_table_lock); + atomic_long_dec(&tlb->mm->nr_ptes); + spin_unlock(ptl); tlb_remove_page(tlb, page); } pte_free(tlb->mm, pgtable); @@ -1415,14 +1427,15 @@ int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long end, unsigned char *vec) { + spinlock_t *ptl; int ret = 0; - if (__pmd_trans_huge_lock(pmd, vma) == 1) { + if (__pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { /* * All logical pages in the range are present * if backed by a huge page. */ - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(ptl); memset(vec, 1, (end - addr) >> PAGE_SHIFT); ret = 1; } @@ -1435,6 +1448,7 @@ int move_huge_pmd(struct vm_area_struct *vma, struct vm_area_struct *new_vma, unsigned long new_addr, unsigned long old_end, pmd_t *old_pmd, pmd_t *new_pmd) { + spinlock_t *old_ptl, *new_ptl; int ret = 0; pmd_t pmd; @@ -1455,12 +1469,21 @@ int move_huge_pmd(struct vm_area_struct *vma, struct vm_area_struct *new_vma, goto out; } - ret = __pmd_trans_huge_lock(old_pmd, vma); + /* + * We don't have to worry about the ordering of src and dst + * ptlocks because exclusive mmap_sem prevents deadlock. + */ + ret = __pmd_trans_huge_lock(old_pmd, vma, &old_ptl); if (ret == 1) { + new_ptl = pmd_lockptr(mm, new_pmd); + if (new_ptl != old_ptl) + spin_lock_nested(new_ptl, SINGLE_DEPTH_NESTING); pmd = pmdp_get_and_clear(mm, old_addr, old_pmd); VM_BUG_ON(!pmd_none(*new_pmd)); set_pmd_at(mm, new_addr, new_pmd, pmd_mksoft_dirty(pmd)); - spin_unlock(&mm->page_table_lock); + if (new_ptl != old_ptl) + spin_unlock(new_ptl); + spin_unlock(old_ptl); } out: return ret; @@ -1476,9 +1499,10 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, pgprot_t newprot, int prot_numa) { struct mm_struct *mm = vma->vm_mm; + spinlock_t *ptl; int ret = 0; - if (__pmd_trans_huge_lock(pmd, vma) == 1) { + if (__pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { pmd_t entry; ret = 1; if (!prot_numa) { @@ -1507,7 +1531,7 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, if (ret == HPAGE_PMD_NR) set_pmd_at(mm, addr, pmd, entry); - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(ptl); } return ret; @@ -1520,12 +1544,13 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, * Note that if it returns 1, this routine returns without unlocking page * table locks. So callers must unlock them. */ -int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) +int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma, + spinlock_t **ptl) { - spin_lock(&vma->vm_mm->page_table_lock); + *ptl = pmd_lock(vma->vm_mm, pmd); if (likely(pmd_trans_huge(*pmd))) { if (unlikely(pmd_trans_splitting(*pmd))) { - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(*ptl); wait_split_huge_page(vma->anon_vma, pmd); return -1; } else { @@ -1534,27 +1559,37 @@ int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) return 1; } } - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(*ptl); return 0; } +/* + * This function returns whether a given @page is mapped onto the @address + * in the virtual space of @mm. + * + * When it's true, this function returns *pmd with holding the page table lock + * and passing it back to the caller via @ptl. + * If it's false, returns NULL without holding the page table lock. + */ pmd_t *page_check_address_pmd(struct page *page, struct mm_struct *mm, unsigned long address, - enum page_check_address_pmd_flag flag) + enum page_check_address_pmd_flag flag, + spinlock_t **ptl) { - pmd_t *pmd, *ret = NULL; + pmd_t *pmd; if (address & ~HPAGE_PMD_MASK) - goto out; + return NULL; pmd = mm_find_pmd(mm, address); if (!pmd) - goto out; + return NULL; + *ptl = pmd_lock(mm, pmd); if (pmd_none(*pmd)) - goto out; + goto unlock; if (pmd_page(*pmd) != page) - goto out; + goto unlock; /* * split_vma() may create temporary aliased mappings. There is * no risk as long as all huge pmd are found and have their @@ -1564,14 +1599,15 @@ pmd_t *page_check_address_pmd(struct page *page, */ if (flag == PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG && pmd_trans_splitting(*pmd)) - goto out; + goto unlock; if (pmd_trans_huge(*pmd)) { VM_BUG_ON(flag == PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG && !pmd_trans_splitting(*pmd)); - ret = pmd; + return pmd; } -out: - return ret; +unlock: + spin_unlock(*ptl); + return NULL; } static int __split_huge_page_splitting(struct page *page, @@ -1579,6 +1615,7 @@ static int __split_huge_page_splitting(struct page *page, unsigned long address) { struct mm_struct *mm = vma->vm_mm; + spinlock_t *ptl; pmd_t *pmd; int ret = 0; /* For mmu_notifiers */ @@ -1586,9 +1623,8 @@ static int __split_huge_page_splitting(struct page *page, const unsigned long mmun_end = address + HPAGE_PMD_SIZE; mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); - spin_lock(&mm->page_table_lock); pmd = page_check_address_pmd(page, mm, address, - PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG); + PAGE_CHECK_ADDRESS_PMD_NOTSPLITTING_FLAG, &ptl); if (pmd) { /* * We can't temporarily set the pmd to null in order @@ -1599,8 +1635,8 @@ static int __split_huge_page_splitting(struct page *page, */ pmdp_splitting_flush(vma, address, pmd); ret = 1; + spin_unlock(ptl); } - spin_unlock(&mm->page_table_lock); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); return ret; @@ -1731,14 +1767,14 @@ static int __split_huge_page_map(struct page *page, unsigned long address) { struct mm_struct *mm = vma->vm_mm; + spinlock_t *ptl; pmd_t *pmd, _pmd; int ret = 0, i; pgtable_t pgtable; unsigned long haddr; - spin_lock(&mm->page_table_lock); pmd = page_check_address_pmd(page, mm, address, - PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG); + PAGE_CHECK_ADDRESS_PMD_SPLITTING_FLAG, &ptl); if (pmd) { pgtable = pgtable_trans_huge_withdraw(mm, pmd); pmd_populate(mm, &_pmd, pgtable); @@ -1793,8 +1829,8 @@ static int __split_huge_page_map(struct page *page, pmdp_invalidate(vma, address, pmd); pmd_populate(mm, pmd, pgtable); ret = 1; + spin_unlock(ptl); } - spin_unlock(&mm->page_table_lock); return ret; } @@ -2346,7 +2382,7 @@ static void collapse_huge_page(struct mm_struct *mm, pte_t *pte; pgtable_t pgtable; struct page *new_page; - spinlock_t *ptl; + spinlock_t *pmd_ptl, *pte_ptl; int isolated; unsigned long hstart, hend; unsigned long mmun_start; /* For mmu_notifiers */ @@ -2389,12 +2425,12 @@ static void collapse_huge_page(struct mm_struct *mm, anon_vma_lock_write(vma->anon_vma); pte = pte_offset_map(pmd, address); - ptl = pte_lockptr(mm, pmd); + pte_ptl = pte_lockptr(mm, pmd); mmun_start = address; mmun_end = address + HPAGE_PMD_SIZE; mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); - spin_lock(&mm->page_table_lock); /* probably unnecessary */ + pmd_ptl = pmd_lock(mm, pmd); /* probably unnecessary */ /* * After this gup_fast can't run anymore. This also removes * any huge TLB entry from the CPU so we won't allow @@ -2402,16 +2438,16 @@ static void collapse_huge_page(struct mm_struct *mm, * to avoid the risk of CPU bugs in that area. */ _pmd = pmdp_clear_flush(vma, address, pmd); - spin_unlock(&mm->page_table_lock); + spin_unlock(pmd_ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); - spin_lock(ptl); + spin_lock(pte_ptl); isolated = __collapse_huge_page_isolate(vma, address, pte); - spin_unlock(ptl); + spin_unlock(pte_ptl); if (unlikely(!isolated)) { pte_unmap(pte); - spin_lock(&mm->page_table_lock); + spin_lock(pmd_ptl); BUG_ON(!pmd_none(*pmd)); /* * We can only use set_pmd_at when establishing @@ -2419,7 +2455,7 @@ static void collapse_huge_page(struct mm_struct *mm, * points to regular pagetables. Use pmd_populate for that */ pmd_populate(mm, pmd, pmd_pgtable(_pmd)); - spin_unlock(&mm->page_table_lock); + spin_unlock(pmd_ptl); anon_vma_unlock_write(vma->anon_vma); goto out; } @@ -2430,7 +2466,7 @@ static void collapse_huge_page(struct mm_struct *mm, */ anon_vma_unlock_write(vma->anon_vma); - __collapse_huge_page_copy(pte, new_page, vma, address, ptl); + __collapse_huge_page_copy(pte, new_page, vma, address, pte_ptl); pte_unmap(pte); __SetPageUptodate(new_page); pgtable = pmd_pgtable(_pmd); @@ -2445,13 +2481,13 @@ static void collapse_huge_page(struct mm_struct *mm, */ smp_wmb(); - spin_lock(&mm->page_table_lock); + spin_lock(pmd_ptl); BUG_ON(!pmd_none(*pmd)); page_add_new_anon_rmap(new_page, vma, address); pgtable_trans_huge_deposit(mm, pmd, pgtable); set_pmd_at(mm, address, pmd, _pmd); update_mmu_cache_pmd(vma, address, pmd); - spin_unlock(&mm->page_table_lock); + spin_unlock(pmd_ptl); *hpage = NULL; @@ -2780,6 +2816,7 @@ static void __split_huge_zero_page_pmd(struct vm_area_struct *vma, void __split_huge_page_pmd(struct vm_area_struct *vma, unsigned long address, pmd_t *pmd) { + spinlock_t *ptl; struct page *page; struct mm_struct *mm = vma->vm_mm; unsigned long haddr = address & HPAGE_PMD_MASK; @@ -2792,22 +2829,22 @@ void __split_huge_page_pmd(struct vm_area_struct *vma, unsigned long address, mmun_end = haddr + HPAGE_PMD_SIZE; again: mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (unlikely(!pmd_trans_huge(*pmd))) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); return; } if (is_huge_zero_pmd(*pmd)) { __split_huge_zero_page_pmd(vma, haddr, pmd); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); return; } page = pmd_page(*pmd); VM_BUG_ON(!page_count(page)); get_page(page); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); split_huge_page(page); diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 0b7656e804d1..7d57af21f49e 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2376,6 +2376,7 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, cow = (vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE; for (addr = vma->vm_start; addr < vma->vm_end; addr += sz) { + spinlock_t *src_ptl, *dst_ptl; src_pte = huge_pte_offset(src, addr); if (!src_pte) continue; @@ -2387,8 +2388,9 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, if (dst_pte == src_pte) continue; - spin_lock(&dst->page_table_lock); - spin_lock_nested(&src->page_table_lock, SINGLE_DEPTH_NESTING); + dst_ptl = huge_pte_lock(h, dst, dst_pte); + src_ptl = huge_pte_lockptr(h, src, src_pte); + spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING); if (!huge_pte_none(huge_ptep_get(src_pte))) { if (cow) huge_ptep_set_wrprotect(src, addr, src_pte); @@ -2398,8 +2400,8 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, page_dup_rmap(ptepage); set_huge_pte_at(dst, addr, dst_pte, entry); } - spin_unlock(&src->page_table_lock); - spin_unlock(&dst->page_table_lock); + spin_unlock(src_ptl); + spin_unlock(dst_ptl); } return 0; @@ -2442,6 +2444,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long address; pte_t *ptep; pte_t pte; + spinlock_t *ptl; struct page *page; struct hstate *h = hstate_vma(vma); unsigned long sz = huge_page_size(h); @@ -2455,25 +2458,25 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma, tlb_start_vma(tlb, vma); mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); again: - spin_lock(&mm->page_table_lock); for (address = start; address < end; address += sz) { ptep = huge_pte_offset(mm, address); if (!ptep) continue; + ptl = huge_pte_lock(h, mm, ptep); if (huge_pmd_unshare(mm, &address, ptep)) - continue; + goto unlock; pte = huge_ptep_get(ptep); if (huge_pte_none(pte)) - continue; + goto unlock; /* * HWPoisoned hugepage is already unmapped and dropped reference */ if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) { huge_pte_clear(mm, address, ptep); - continue; + goto unlock; } page = pte_page(pte); @@ -2484,7 +2487,7 @@ again: */ if (ref_page) { if (page != ref_page) - continue; + goto unlock; /* * Mark the VMA as having unmapped its page so that @@ -2501,13 +2504,18 @@ again: page_remove_rmap(page); force_flush = !__tlb_remove_page(tlb, page); - if (force_flush) + if (force_flush) { + spin_unlock(ptl); break; + } /* Bail out after unmapping reference page if supplied */ - if (ref_page) + if (ref_page) { + spin_unlock(ptl); break; + } +unlock: + spin_unlock(ptl); } - spin_unlock(&mm->page_table_lock); /* * mmu_gather ran out of room to batch pages, we break out of * the PTE lock to avoid doing the potential expensive TLB invalidate @@ -2613,7 +2621,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma, */ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pte_t *ptep, pte_t pte, - struct page *pagecache_page) + struct page *pagecache_page, spinlock_t *ptl) { struct hstate *h = hstate_vma(vma); struct page *old_page, *new_page; @@ -2647,8 +2655,8 @@ retry_avoidcopy: page_cache_get(old_page); - /* Drop page_table_lock as buddy allocator may be called */ - spin_unlock(&mm->page_table_lock); + /* Drop page table lock as buddy allocator may be called */ + spin_unlock(ptl); new_page = alloc_huge_page(vma, address, outside_reserve); if (IS_ERR(new_page)) { @@ -2666,13 +2674,13 @@ retry_avoidcopy: BUG_ON(huge_pte_none(pte)); if (unmap_ref_private(mm, vma, old_page, address)) { BUG_ON(huge_pte_none(pte)); - spin_lock(&mm->page_table_lock); + spin_lock(ptl); ptep = huge_pte_offset(mm, address & huge_page_mask(h)); if (likely(pte_same(huge_ptep_get(ptep), pte))) goto retry_avoidcopy; /* - * race occurs while re-acquiring page_table_lock, and - * our job is done. + * race occurs while re-acquiring page table + * lock, and our job is done. */ return 0; } @@ -2680,7 +2688,7 @@ retry_avoidcopy: } /* Caller expects lock to be held */ - spin_lock(&mm->page_table_lock); + spin_lock(ptl); if (err == -ENOMEM) return VM_FAULT_OOM; else @@ -2695,7 +2703,7 @@ retry_avoidcopy: page_cache_release(new_page); page_cache_release(old_page); /* Caller expects lock to be held */ - spin_lock(&mm->page_table_lock); + spin_lock(ptl); return VM_FAULT_OOM; } @@ -2707,10 +2715,10 @@ retry_avoidcopy: mmun_end = mmun_start + huge_page_size(h); mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end); /* - * Retake the page_table_lock to check for racing updates + * Retake the page table lock to check for racing updates * before the page tables are altered */ - spin_lock(&mm->page_table_lock); + spin_lock(ptl); ptep = huge_pte_offset(mm, address & huge_page_mask(h)); if (likely(pte_same(huge_ptep_get(ptep), pte))) { ClearPagePrivate(new_page); @@ -2724,13 +2732,13 @@ retry_avoidcopy: /* Make the old page be freed below */ new_page = old_page; } - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); page_cache_release(new_page); page_cache_release(old_page); /* Caller expects lock to be held */ - spin_lock(&mm->page_table_lock); + spin_lock(ptl); return 0; } @@ -2778,6 +2786,7 @@ static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma, struct page *page; struct address_space *mapping; pte_t new_pte; + spinlock_t *ptl; /* * Currently, we are forced to kill the process in the event the @@ -2864,7 +2873,8 @@ retry: goto backout_unlocked; } - spin_lock(&mm->page_table_lock); + ptl = huge_pte_lockptr(h, mm, ptep); + spin_lock(ptl); size = i_size_read(mapping->host) >> huge_page_shift(h); if (idx >= size) goto backout; @@ -2885,16 +2895,16 @@ retry: if ((flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) { /* Optimization, do the COW without a second fault */ - ret = hugetlb_cow(mm, vma, address, ptep, new_pte, page); + ret = hugetlb_cow(mm, vma, address, ptep, new_pte, page, ptl); } - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); unlock_page(page); out: return ret; backout: - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); backout_unlocked: unlock_page(page); put_page(page); @@ -2906,6 +2916,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, { pte_t *ptep; pte_t entry; + spinlock_t *ptl; int ret; struct page *page = NULL; struct page *pagecache_page = NULL; @@ -2918,7 +2929,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, if (ptep) { entry = huge_ptep_get(ptep); if (unlikely(is_hugetlb_entry_migration(entry))) { - migration_entry_wait_huge(mm, ptep); + migration_entry_wait_huge(vma, mm, ptep); return 0; } else if (unlikely(is_hugetlb_entry_hwpoisoned(entry))) return VM_FAULT_HWPOISON_LARGE | @@ -2974,17 +2985,18 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, if (page != pagecache_page) lock_page(page); - spin_lock(&mm->page_table_lock); + ptl = huge_pte_lockptr(h, mm, ptep); + spin_lock(ptl); /* Check for a racing update before calling hugetlb_cow */ if (unlikely(!pte_same(entry, huge_ptep_get(ptep)))) - goto out_page_table_lock; + goto out_ptl; if (flags & FAULT_FLAG_WRITE) { if (!huge_pte_write(entry)) { ret = hugetlb_cow(mm, vma, address, ptep, entry, - pagecache_page); - goto out_page_table_lock; + pagecache_page, ptl); + goto out_ptl; } entry = huge_pte_mkdirty(entry); } @@ -2993,8 +3005,8 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, flags & FAULT_FLAG_WRITE)) update_mmu_cache(vma, address, ptep); -out_page_table_lock: - spin_unlock(&mm->page_table_lock); +out_ptl: + spin_unlock(ptl); if (pagecache_page) { unlock_page(pagecache_page); @@ -3020,9 +3032,9 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long remainder = *nr_pages; struct hstate *h = hstate_vma(vma); - spin_lock(&mm->page_table_lock); while (vaddr < vma->vm_end && remainder) { pte_t *pte; + spinlock_t *ptl = NULL; int absent; struct page *page; @@ -3030,8 +3042,12 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, * Some archs (sparc64, sh*) have multiple pte_ts to * each hugepage. We have to make sure we get the * first, for the page indexing below to work. + * + * Note that page table lock is not held when pte is null. */ pte = huge_pte_offset(mm, vaddr & huge_page_mask(h)); + if (pte) + ptl = huge_pte_lock(h, mm, pte); absent = !pte || huge_pte_none(huge_ptep_get(pte)); /* @@ -3043,6 +3059,8 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, */ if (absent && (flags & FOLL_DUMP) && !hugetlbfs_pagecache_present(h, vma, vaddr)) { + if (pte) + spin_unlock(ptl); remainder = 0; break; } @@ -3062,10 +3080,10 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, !huge_pte_write(huge_ptep_get(pte)))) { int ret; - spin_unlock(&mm->page_table_lock); + if (pte) + spin_unlock(ptl); ret = hugetlb_fault(mm, vma, vaddr, (flags & FOLL_WRITE) ? FAULT_FLAG_WRITE : 0); - spin_lock(&mm->page_table_lock); if (!(ret & VM_FAULT_ERROR)) continue; @@ -3096,8 +3114,8 @@ same_page: */ goto same_page; } + spin_unlock(ptl); } - spin_unlock(&mm->page_table_lock); *nr_pages = remainder; *position = vaddr; @@ -3118,13 +3136,15 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma, flush_cache_range(vma, address, end); mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex); - spin_lock(&mm->page_table_lock); for (; address < end; address += huge_page_size(h)) { + spinlock_t *ptl; ptep = huge_pte_offset(mm, address); if (!ptep) continue; + ptl = huge_pte_lock(h, mm, ptep); if (huge_pmd_unshare(mm, &address, ptep)) { pages++; + spin_unlock(ptl); continue; } if (!huge_pte_none(huge_ptep_get(ptep))) { @@ -3134,8 +3154,8 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma, set_huge_pte_at(mm, address, ptep, pte); pages++; } + spin_unlock(ptl); } - spin_unlock(&mm->page_table_lock); /* * Must flush TLB before releasing i_mmap_mutex: x86's huge_pmd_unshare * may have cleared our pud entry and done put_page on the page table: @@ -3298,6 +3318,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud) unsigned long saddr; pte_t *spte = NULL; pte_t *pte; + spinlock_t *ptl; if (!vma_shareable(vma, addr)) return (pte_t *)pmd_alloc(mm, pud, addr); @@ -3320,13 +3341,14 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud) if (!spte) goto out; - spin_lock(&mm->page_table_lock); + ptl = huge_pte_lockptr(hstate_vma(vma), mm, spte); + spin_lock(ptl); if (pud_none(*pud)) pud_populate(mm, pud, (pmd_t *)((unsigned long)spte & PAGE_MASK)); else put_page(virt_to_page(spte)); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); out: pte = (pte_t *)pmd_alloc(mm, pud, addr); mutex_unlock(&mapping->i_mmap_mutex); @@ -3340,7 +3362,7 @@ out: * indicated by page_count > 1, unmap is achieved by clearing pud and * decrementing the ref count. If count == 1, the pte page is not shared. * - * called with vma->vm_mm->page_table_lock held. + * called with page table lock held. * * returns: 1 successfully unmapped a shared pte page * 0 the underlying pte page is not shared, or it is the last user diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e3cd40b2d5d9..f1a0ae6e11b8 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -6605,10 +6605,10 @@ static int mem_cgroup_count_precharge_pte_range(pmd_t *pmd, pte_t *pte; spinlock_t *ptl; - if (pmd_trans_huge_lock(pmd, vma) == 1) { + if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { if (get_mctgt_type_thp(vma, addr, *pmd, NULL) == MC_TARGET_PAGE) mc.precharge += HPAGE_PMD_NR; - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(ptl); return 0; } @@ -6797,9 +6797,9 @@ static int mem_cgroup_move_charge_pte_range(pmd_t *pmd, * to be unlocked in __split_huge_page_splitting(), where the main * part of thp split is not executed yet. */ - if (pmd_trans_huge_lock(pmd, vma) == 1) { + if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) { if (mc.precharge < HPAGE_PMD_NR) { - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(ptl); return 0; } target_type = get_mctgt_type_thp(vma, addr, *pmd, &target); @@ -6816,7 +6816,7 @@ static int mem_cgroup_move_charge_pte_range(pmd_t *pmd, } put_page(page); } - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(ptl); return 0; } diff --git a/mm/memory-failure.c b/mm/memory-failure.c index f9d78ec7831f..b7c171602ba1 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1269,7 +1269,7 @@ void memory_failure_queue(unsigned long pfn, int trapno, int flags) mf_cpu = &get_cpu_var(memory_failure_cpu); spin_lock_irqsave(&mf_cpu->lock, proc_flags); - if (kfifo_put(&mf_cpu->fifo, &entry)) + if (kfifo_put(&mf_cpu->fifo, entry)) schedule_work_on(smp_processor_id(), &mf_cpu->work); else pr_err("Memory failure: buffer overflow when queuing memory failure at %#lx\n", diff --git a/mm/memory.c b/mm/memory.c index bf8665849a5f..0409e8f43fa0 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -382,7 +382,7 @@ static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd, pgtable_t token = pmd_pgtable(*pmd); pmd_clear(pmd); pte_free_tlb(tlb, token, addr); - tlb->mm->nr_ptes--; + atomic_long_dec(&tlb->mm->nr_ptes); } static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud, @@ -550,6 +550,7 @@ void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *vma, int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, pmd_t *pmd, unsigned long address) { + spinlock_t *ptl; pgtable_t new = pte_alloc_one(mm, address); int wait_split_huge_page; if (!new) @@ -570,15 +571,15 @@ int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, */ smp_wmb(); /* Could be smp_wmb__xxx(before|after)_spin_lock */ - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); wait_split_huge_page = 0; if (likely(pmd_none(*pmd))) { /* Has another populated it ? */ - mm->nr_ptes++; + atomic_long_inc(&mm->nr_ptes); pmd_populate(mm, pmd, new); new = NULL; } else if (unlikely(pmd_trans_splitting(*pmd))) wait_split_huge_page = 1; - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); if (new) pte_free(mm, new); if (wait_split_huge_page) @@ -1516,20 +1517,20 @@ struct page *follow_page_mask(struct vm_area_struct *vma, split_huge_page_pmd(vma, address, pmd); goto split_fallthrough; } - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (likely(pmd_trans_huge(*pmd))) { if (unlikely(pmd_trans_splitting(*pmd))) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); wait_split_huge_page(vma->anon_vma, pmd); } else { page = follow_trans_huge_pmd(vma, address, pmd, flags); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); *page_mask = HPAGE_PMD_NR - 1; goto out; } } else - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); /* fall through */ } split_fallthrough: @@ -4269,3 +4270,28 @@ void copy_user_huge_page(struct page *dst, struct page *src, } } #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */ + +#if USE_SPLIT_PTE_PTLOCKS && BLOATED_SPINLOCKS +static struct kmem_cache *page_ptl_cachep; +void __init ptlock_cache_init(void) +{ + page_ptl_cachep = kmem_cache_create("page->ptl", sizeof(spinlock_t), 0, + SLAB_PANIC, NULL); +} + +bool ptlock_alloc(struct page *page) +{ + spinlock_t *ptl; + + ptl = kmalloc(sizeof(spinlock_t), GFP_KERNEL); + if (!ptl) + return false; + page->ptl = ptl; + return true; +} + +void ptlock_free(struct page *page) +{ + kfree(page->ptl); +} +#endif diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 4cc19f6ab6c6..c4403cdf3433 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -525,8 +525,9 @@ static void queue_pages_hugetlb_pmd_range(struct vm_area_struct *vma, #ifdef CONFIG_HUGETLB_PAGE int nid; struct page *page; + spinlock_t *ptl; - spin_lock(&vma->vm_mm->page_table_lock); + ptl = huge_pte_lock(hstate_vma(vma), vma->vm_mm, (pte_t *)pmd); page = pte_page(huge_ptep_get((pte_t *)pmd)); nid = page_to_nid(page); if (node_isset(nid, *nodes) == !!(flags & MPOL_MF_INVERT)) @@ -536,7 +537,7 @@ static void queue_pages_hugetlb_pmd_range(struct vm_area_struct *vma, (flags & MPOL_MF_MOVE && page_mapcount(page) == 1)) isolate_huge_page(page, private); unlock: - spin_unlock(&vma->vm_mm->page_table_lock); + spin_unlock(ptl); #else BUG(); #endif diff --git a/mm/migrate.c b/mm/migrate.c index dfc8300ecbb2..316e720a2023 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -130,7 +130,7 @@ static int remove_migration_pte(struct page *new, struct vm_area_struct *vma, ptep = huge_pte_offset(mm, addr); if (!ptep) goto out; - ptl = &mm->page_table_lock; + ptl = huge_pte_lockptr(hstate_vma(vma), mm, ptep); } else { pmd = mm_find_pmd(mm, addr); if (!pmd) @@ -249,9 +249,10 @@ void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd, __migration_entry_wait(mm, ptep, ptl); } -void migration_entry_wait_huge(struct mm_struct *mm, pte_t *pte) +void migration_entry_wait_huge(struct vm_area_struct *vma, + struct mm_struct *mm, pte_t *pte) { - spinlock_t *ptl = &(mm)->page_table_lock; + spinlock_t *ptl = huge_pte_lockptr(hstate_vma(vma), mm, pte); __migration_entry_wait(mm, pte, ptl); } @@ -1666,6 +1667,7 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, unsigned long address, struct page *page, int node) { + spinlock_t *ptl; unsigned long haddr = address & HPAGE_PMD_MASK; pg_data_t *pgdat = NODE_DATA(node); int isolated = 0; @@ -1705,9 +1707,9 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, WARN_ON(PageLRU(new_page)); /* Recheck the target PMD */ - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (unlikely(!pmd_same(*pmd, entry))) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); /* Reverse changes made by migrate_page_copy() */ if (TestClearPageActive(new_page)) @@ -1752,7 +1754,7 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, * before it's fully transferred to the new page. */ mem_cgroup_end_migration(memcg, page, new_page, true); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); unlock_page(new_page); unlock_page(page); diff --git a/mm/mmap.c b/mm/mmap.c index 5a6baddde15d..834b2d785f1e 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2724,7 +2724,8 @@ void exit_mmap(struct mm_struct *mm) } vm_unacct_memory(nr_accounted); - WARN_ON(mm->nr_ptes > (FIRST_USER_ADDRESS+PMD_SIZE-1)>>PMD_SHIFT); + WARN_ON(atomic_long_read(&mm->nr_ptes) > + (FIRST_USER_ADDRESS+PMD_SIZE-1)>>PMD_SHIFT); } /* Insert vm structure into process list sorted by address diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 6738c47f1f72..1e4a600a6163 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -161,7 +161,7 @@ unsigned long oom_badness(struct task_struct *p, struct mem_cgroup *memcg, * The baseline for the badness score is the proportion of RAM that each * task's rss, pagetable and swap space use. */ - points = get_mm_rss(p->mm) + p->mm->nr_ptes + + points = get_mm_rss(p->mm) + atomic_long_read(&p->mm->nr_ptes) + get_mm_counter(p->mm, MM_SWAPENTS); task_unlock(p); @@ -364,10 +364,10 @@ static void dump_tasks(const struct mem_cgroup *memcg, const nodemask_t *nodemas continue; } - pr_info("[%5d] %5d %5d %8lu %8lu %7lu %8lu %5hd %s\n", + pr_info("[%5d] %5d %5d %8lu %8lu %7ld %8lu %5hd %s\n", task->pid, from_kuid(&init_user_ns, task_uid(task)), task->tgid, task->mm->total_vm, get_mm_rss(task->mm), - task->mm->nr_ptes, + atomic_long_read(&task->mm->nr_ptes), get_mm_counter(task->mm, MM_SWAPENTS), task->signal->oom_score_adj, task->comm); task_unlock(task); diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index 3929a40bd6c0..cbb38545d9d6 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -151,14 +151,14 @@ void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address, void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp, pgtable_t pgtable) { - assert_spin_locked(&mm->page_table_lock); + assert_spin_locked(pmd_lockptr(mm, pmdp)); /* FIFO */ - if (!mm->pmd_huge_pte) + if (!pmd_huge_pte(mm, pmdp)) INIT_LIST_HEAD(&pgtable->lru); else - list_add(&pgtable->lru, &mm->pmd_huge_pte->lru); - mm->pmd_huge_pte = pgtable; + list_add(&pgtable->lru, &pmd_huge_pte(mm, pmdp)->lru); + pmd_huge_pte(mm, pmdp) = pgtable; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif @@ -170,14 +170,14 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp) { pgtable_t pgtable; - assert_spin_locked(&mm->page_table_lock); + assert_spin_locked(pmd_lockptr(mm, pmdp)); /* FIFO */ - pgtable = mm->pmd_huge_pte; + pgtable = pmd_huge_pte(mm, pmdp); if (list_empty(&pgtable->lru)) - mm->pmd_huge_pte = NULL; + pmd_huge_pte(mm, pmdp) = NULL; else { - mm->pmd_huge_pte = list_entry(pgtable->lru.next, + pmd_huge_pte(mm, pmdp) = list_entry(pgtable->lru.next, struct page, lru); list_del(&pgtable->lru); } diff --git a/mm/rmap.c b/mm/rmap.c index fd3ee7a54a13..55c8b8dc9ffb 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -601,7 +601,7 @@ pte_t *__page_check_address(struct page *page, struct mm_struct *mm, if (unlikely(PageHuge(page))) { pte = huge_pte_offset(mm, address); - ptl = &mm->page_table_lock; + ptl = huge_pte_lockptr(page_hstate(page), mm, pte); goto check; } @@ -665,25 +665,23 @@ int page_referenced_one(struct page *page, struct vm_area_struct *vma, unsigned long *vm_flags) { struct mm_struct *mm = vma->vm_mm; + spinlock_t *ptl; int referenced = 0; if (unlikely(PageTransHuge(page))) { pmd_t *pmd; - spin_lock(&mm->page_table_lock); /* * rmap might return false positives; we must filter * these out using page_check_address_pmd(). */ pmd = page_check_address_pmd(page, mm, address, - PAGE_CHECK_ADDRESS_PMD_FLAG); - if (!pmd) { - spin_unlock(&mm->page_table_lock); + PAGE_CHECK_ADDRESS_PMD_FLAG, &ptl); + if (!pmd) goto out; - } if (vma->vm_flags & VM_LOCKED) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); *mapcount = 0; /* break early from loop */ *vm_flags |= VM_LOCKED; goto out; @@ -692,10 +690,9 @@ int page_referenced_one(struct page *page, struct vm_area_struct *vma, /* go ahead even if the pmd is pmd_trans_splitting() */ if (pmdp_clear_flush_young_notify(vma, address, pmd)) referenced++; - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); } else { pte_t *pte; - spinlock_t *ptl; /* * rmap might return false positives; we must filter diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index ec9a9ef4ce50..5afeb5aa4c7c 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -2523,16 +2523,17 @@ static int fib_route_seq_show(struct seq_file *seq, void *v) list_for_each_entry_rcu(fa, &li->falh, fa_list) { const struct fib_info *fi = fa->fa_info; unsigned int flags = fib_flag_trans(fa->fa_type, mask, fi); - int len; if (fa->fa_type == RTN_BROADCAST || fa->fa_type == RTN_MULTICAST) continue; + seq_setwidth(seq, 127); + if (fi) seq_printf(seq, "%s\t%08X\t%08X\t%04X\t%d\t%u\t" - "%d\t%08X\t%d\t%u\t%u%n", + "%d\t%08X\t%d\t%u\t%u", fi->fib_dev ? fi->fib_dev->name : "*", prefix, fi->fib_nh->nh_gw, flags, 0, 0, @@ -2541,15 +2542,15 @@ static int fib_route_seq_show(struct seq_file *seq, void *v) (fi->fib_advmss ? fi->fib_advmss + 40 : 0), fi->fib_window, - fi->fib_rtt >> 3, &len); + fi->fib_rtt >> 3); else seq_printf(seq, "*\t%08X\t%08X\t%04X\t%d\t%u\t" - "%d\t%08X\t%d\t%u\t%u%n", + "%d\t%08X\t%d\t%u\t%u", prefix, 0, flags, 0, 0, 0, - mask, 0, 0, 0, &len); + mask, 0, 0, 0); - seq_printf(seq, "%*s\n", 127 - len, ""); + seq_pad(seq, '\n'); } } diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 9afbdb19f4a2..cbc85f660d54 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -1076,7 +1076,7 @@ void ping_seq_stop(struct seq_file *seq, void *v) EXPORT_SYMBOL_GPL(ping_seq_stop); static void ping_v4_format_sock(struct sock *sp, struct seq_file *f, - int bucket, int *len) + int bucket) { struct inet_sock *inet = inet_sk(sp); __be32 dest = inet->inet_daddr; @@ -1085,7 +1085,7 @@ static void ping_v4_format_sock(struct sock *sp, struct seq_file *f, __u16 srcp = ntohs(inet->inet_sport); seq_printf(f, "%5d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d%n", + " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d", bucket, src, srcp, dest, destp, sp->sk_state, sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), @@ -1093,23 +1093,22 @@ static void ping_v4_format_sock(struct sock *sp, struct seq_file *f, from_kuid_munged(seq_user_ns(f), sock_i_uid(sp)), 0, sock_i_ino(sp), atomic_read(&sp->sk_refcnt), sp, - atomic_read(&sp->sk_drops), len); + atomic_read(&sp->sk_drops)); } static int ping_v4_seq_show(struct seq_file *seq, void *v) { + seq_setwidth(seq, 127); if (v == SEQ_START_TOKEN) - seq_printf(seq, "%-127s\n", - " sl local_address rem_address st tx_queue " + seq_puts(seq, " sl local_address rem_address st tx_queue " "rx_queue tr tm->when retrnsmt uid timeout " "inode ref pointer drops"); else { struct ping_iter_state *state = seq->private; - int len; - ping_v4_format_sock(v, seq, state->bucket, &len); - seq_printf(seq, "%*s\n", 127 - len, ""); + ping_v4_format_sock(v, seq, state->bucket); } + seq_pad(seq, '\n'); return 0; } diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 14bba8a1c5a7..59a6f8b90cd9 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2541,13 +2541,13 @@ void tcp_proc_unregister(struct net *net, struct tcp_seq_afinfo *afinfo) EXPORT_SYMBOL(tcp_proc_unregister); static void get_openreq4(const struct sock *sk, const struct request_sock *req, - struct seq_file *f, int i, kuid_t uid, int *len) + struct seq_file *f, int i, kuid_t uid) { const struct inet_request_sock *ireq = inet_rsk(req); long delta = req->expires - jiffies; seq_printf(f, "%4d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5u %8d %u %d %pK%n", + " %02X %08X:%08X %02X:%08lX %08X %5u %8d %u %d %pK", i, ireq->ir_loc_addr, ntohs(inet_sk(sk)->inet_sport), @@ -2562,11 +2562,10 @@ static void get_openreq4(const struct sock *sk, const struct request_sock *req, 0, /* non standard timer */ 0, /* open_requests have no inode */ atomic_read(&sk->sk_refcnt), - req, - len); + req); } -static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len) +static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i) { int timer_active; unsigned long timer_expires; @@ -2605,7 +2604,7 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len) rx_queue = max_t(int, tp->rcv_nxt - tp->copied_seq, 0); seq_printf(f, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX " - "%08X %5u %8d %lu %d %pK %lu %lu %u %u %d%n", + "%08X %5u %8d %lu %d %pK %lu %lu %u %u %d", i, src, srcp, dest, destp, sk->sk_state, tp->write_seq - tp->snd_una, rx_queue, @@ -2622,12 +2621,11 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i, int *len) tp->snd_cwnd, sk->sk_state == TCP_LISTEN ? (fastopenq ? fastopenq->max_qlen : 0) : - (tcp_in_initial_slowstart(tp) ? -1 : tp->snd_ssthresh), - len); + (tcp_in_initial_slowstart(tp) ? -1 : tp->snd_ssthresh)); } static void get_timewait4_sock(const struct inet_timewait_sock *tw, - struct seq_file *f, int i, int *len) + struct seq_file *f, int i) { __be32 dest, src; __u16 destp, srcp; @@ -2639,10 +2637,10 @@ static void get_timewait4_sock(const struct inet_timewait_sock *tw, srcp = ntohs(tw->tw_sport); seq_printf(f, "%4d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK%n", + " %02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK", i, src, srcp, dest, destp, tw->tw_substate, 0, 0, 3, jiffies_delta_to_clock_t(delta), 0, 0, 0, 0, - atomic_read(&tw->tw_refcnt), tw, len); + atomic_read(&tw->tw_refcnt), tw); } #define TMPSZ 150 @@ -2651,11 +2649,10 @@ static int tcp4_seq_show(struct seq_file *seq, void *v) { struct tcp_iter_state *st; struct sock *sk = v; - int len; + seq_setwidth(seq, TMPSZ - 1); if (v == SEQ_START_TOKEN) { - seq_printf(seq, "%-*s\n", TMPSZ - 1, - " sl local_address rem_address st tx_queue " + seq_puts(seq, " sl local_address rem_address st tx_queue " "rx_queue tr tm->when retrnsmt uid timeout " "inode"); goto out; @@ -2666,16 +2663,16 @@ static int tcp4_seq_show(struct seq_file *seq, void *v) case TCP_SEQ_STATE_LISTENING: case TCP_SEQ_STATE_ESTABLISHED: if (sk->sk_state == TCP_TIME_WAIT) - get_timewait4_sock(v, seq, st->num, &len); + get_timewait4_sock(v, seq, st->num); else - get_tcp4_sock(v, seq, st->num, &len); + get_tcp4_sock(v, seq, st->num); break; case TCP_SEQ_STATE_OPENREQ: - get_openreq4(st->syn_wait_sk, v, seq, st->num, st->uid, &len); + get_openreq4(st->syn_wait_sk, v, seq, st->num, st->uid); break; } - seq_printf(seq, "%*s\n", TMPSZ - 1 - len, ""); out: + seq_pad(seq, '\n'); return 0; } diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 89909dd730dd..de86e5bc4462 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2331,7 +2331,7 @@ EXPORT_SYMBOL(udp_proc_unregister); /* ------------------------------------------------------------------------ */ static void udp4_format_sock(struct sock *sp, struct seq_file *f, - int bucket, int *len) + int bucket) { struct inet_sock *inet = inet_sk(sp); __be32 dest = inet->inet_daddr; @@ -2340,7 +2340,7 @@ static void udp4_format_sock(struct sock *sp, struct seq_file *f, __u16 srcp = ntohs(inet->inet_sport); seq_printf(f, "%5d: %08X:%04X %08X:%04X" - " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d%n", + " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d", bucket, src, srcp, dest, destp, sp->sk_state, sk_wmem_alloc_get(sp), sk_rmem_alloc_get(sp), @@ -2348,23 +2348,22 @@ static void udp4_format_sock(struct sock *sp, struct seq_file *f, from_kuid_munged(seq_user_ns(f), sock_i_uid(sp)), 0, sock_i_ino(sp), atomic_read(&sp->sk_refcnt), sp, - atomic_read(&sp->sk_drops), len); + atomic_read(&sp->sk_drops)); } int udp4_seq_show(struct seq_file *seq, void *v) { + seq_setwidth(seq, 127); if (v == SEQ_START_TOKEN) - seq_printf(seq, "%-127s\n", - " sl local_address rem_address st tx_queue " + seq_puts(seq, " sl local_address rem_address st tx_queue " "rx_queue tr tm->when retrnsmt uid timeout " "inode ref pointer drops"); else { struct udp_iter_state *state = seq->private; - int len; - udp4_format_sock(v, seq, state->bucket, &len); - seq_printf(seq, "%*s\n", 127 - len, ""); + udp4_format_sock(v, seq, state->bucket); } + seq_pad(seq, '\n'); return 0; } diff --git a/net/phonet/socket.c b/net/phonet/socket.c index 77e38f733496..008214a3d5eb 100644 --- a/net/phonet/socket.c +++ b/net/phonet/socket.c @@ -595,26 +595,25 @@ static void pn_sock_seq_stop(struct seq_file *seq, void *v) static int pn_sock_seq_show(struct seq_file *seq, void *v) { - int len; - + seq_setwidth(seq, 127); if (v == SEQ_START_TOKEN) - seq_printf(seq, "%s%n", "pt loc rem rs st tx_queue rx_queue " - " uid inode ref pointer drops", &len); + seq_puts(seq, "pt loc rem rs st tx_queue rx_queue " + " uid inode ref pointer drops"); else { struct sock *sk = v; struct pn_sock *pn = pn_sk(sk); seq_printf(seq, "%2d %04X:%04X:%02X %02X %08X:%08X %5d %lu " - "%d %pK %d%n", + "%d %pK %d", sk->sk_protocol, pn->sobject, pn->dobject, pn->resource, sk->sk_state, sk_wmem_alloc_get(sk), sk_rmem_alloc_get(sk), from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), sock_i_ino(sk), atomic_read(&sk->sk_refcnt), sk, - atomic_read(&sk->sk_drops), &len); + atomic_read(&sk->sk_drops)); } - seq_printf(seq, "%*s\n", 127 - len, ""); + seq_pad(seq, '\n'); return 0; } @@ -785,20 +784,19 @@ static void pn_res_seq_stop(struct seq_file *seq, void *v) static int pn_res_seq_show(struct seq_file *seq, void *v) { - int len; - + seq_setwidth(seq, 63); if (v == SEQ_START_TOKEN) - seq_printf(seq, "%s%n", "rs uid inode", &len); + seq_puts(seq, "rs uid inode"); else { struct sock **psk = v; struct sock *sk = *psk; - seq_printf(seq, "%02X %5u %lu%n", + seq_printf(seq, "%02X %5u %lu", (int) (psk - pnres.sk), from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), - sock_i_ino(sk), &len); + sock_i_ino(sk)); } - seq_printf(seq, "%*s\n", 63 - len, ""); + seq_pad(seq, '\n'); return 0; } diff --git a/net/sctp/objcnt.c b/net/sctp/objcnt.c index 5ea573b37648..647396baa56f 100644 --- a/net/sctp/objcnt.c +++ b/net/sctp/objcnt.c @@ -79,12 +79,13 @@ static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = { */ static int sctp_objcnt_seq_show(struct seq_file *seq, void *v) { - int i, len; + int i; i = (int)*(loff_t *)v; - seq_printf(seq, "%s: %d%n", sctp_dbg_objcnt[i].label, - atomic_read(sctp_dbg_objcnt[i].counter), &len); - seq_printf(seq, "%*s\n", 127 - len, ""); + seq_setwidth(seq, 127); + seq_printf(seq, "%s: %d", sctp_dbg_objcnt[i].label, + atomic_read(sctp_dbg_objcnt[i].counter)); + seq_pad(seq, '\n'); return 0; } diff --git a/samples/kfifo/bytestream-example.c b/samples/kfifo/bytestream-example.c index cfe40addda76..2fca916d9edf 100644 --- a/samples/kfifo/bytestream-example.c +++ b/samples/kfifo/bytestream-example.c @@ -64,7 +64,7 @@ static int __init testfunc(void) /* put values into the fifo */ for (i = 0; i != 10; i++) - kfifo_put(&test, &i); + kfifo_put(&test, i); /* show the number of used elements */ printk(KERN_INFO "fifo len: %u\n", kfifo_len(&test)); @@ -85,7 +85,7 @@ static int __init testfunc(void) kfifo_skip(&test); /* put values into the fifo until is full */ - for (i = 20; kfifo_put(&test, &i); i++) + for (i = 20; kfifo_put(&test, i); i++) ; printk(KERN_INFO "queue len: %u\n", kfifo_len(&test)); diff --git a/samples/kfifo/dma-example.c b/samples/kfifo/dma-example.c index 06473791c08a..aa243db93f01 100644 --- a/samples/kfifo/dma-example.c +++ b/samples/kfifo/dma-example.c @@ -39,7 +39,7 @@ static int __init example_init(void) kfifo_in(&fifo, "test", 4); for (i = 0; i != 9; i++) - kfifo_put(&fifo, &i); + kfifo_put(&fifo, i); /* kick away first byte */ kfifo_skip(&fifo); diff --git a/samples/kfifo/inttype-example.c b/samples/kfifo/inttype-example.c index 6f8e79e76c9e..8dc3c2e7105a 100644 --- a/samples/kfifo/inttype-example.c +++ b/samples/kfifo/inttype-example.c @@ -61,7 +61,7 @@ static int __init testfunc(void) /* put values into the fifo */ for (i = 0; i != 10; i++) - kfifo_put(&test, &i); + kfifo_put(&test, i); /* show the number of used elements */ printk(KERN_INFO "fifo len: %u\n", kfifo_len(&test)); @@ -78,7 +78,7 @@ static int __init testfunc(void) kfifo_skip(&test); /* put values into the fifo until is full */ - for (i = 20; kfifo_put(&test, &i); i++) + for (i = 20; kfifo_put(&test, i); i++) ; printk(KERN_INFO "queue len: %u\n", kfifo_len(&test)); diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index 9d93f02c6285..5e1c7bc73b29 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -184,11 +184,7 @@ static void snd_malloc_dev_iram(struct snd_dma_buffer *dmab, size_t size) /* Assign the pool into private_data field */ dmab->private_data = pool; - dmab->area = (void *)gen_pool_alloc(pool, size); - if (!dmab->area) - return; - - dmab->addr = gen_pool_virt_to_phys(pool, (unsigned long)dmab->area); + dmab->area = gen_pool_dma_alloc(pool, size, &dmab->addr); } /** diff --git a/sound/firewire/dice.c b/sound/firewire/dice.c index 6feee6614193..57bcd31fcc12 100644 --- a/sound/firewire/dice.c +++ b/sound/firewire/dice.c @@ -543,7 +543,7 @@ static int dice_change_rate(struct dice *dice, unsigned int clock_rate) __be32 value; int err; - INIT_COMPLETION(dice->clock_accepted); + reinit_completion(&dice->clock_accepted); value = cpu_to_be32(clock_rate | CLOCK_SOURCE_ARX1); err = snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, diff --git a/sound/soc/samsung/ac97.c b/sound/soc/samsung/ac97.c index 2acf987844e8..350ba23a9893 100644 --- a/sound/soc/samsung/ac97.c +++ b/sound/soc/samsung/ac97.c @@ -74,7 +74,7 @@ static void s3c_ac97_activate(struct snd_ac97 *ac97) if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE) return; /* Return if already active */ - INIT_COMPLETION(s3c_ac97.done); + reinit_completion(&s3c_ac97.done); ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON; @@ -103,7 +103,7 @@ static unsigned short s3c_ac97_read(struct snd_ac97 *ac97, s3c_ac97_activate(ac97); - INIT_COMPLETION(s3c_ac97.done); + reinit_completion(&s3c_ac97.done); ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg); @@ -140,7 +140,7 @@ static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg, s3c_ac97_activate(ac97); - INIT_COMPLETION(s3c_ac97.done); + reinit_completion(&s3c_ac97.done); ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val); |
