6 files changed, 41 insertions, 17 deletions

diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h
index a950a22c4890..cac7404b2bdd 100644
--- a/include/asm-generic/cacheflush.h
+++ b/include/asm-generic/cacheflush.h
@@ -11,71 +11,102 @@
  * The cache doesn't need to be flushed when TLB entries change when
  * the cache is mapped to physical memory, not virtual memory
  */
+#ifndef flush_cache_all
 static inline void flush_cache_all(void)
 {
 }
+#endif
 
+#ifndef flush_cache_mm
 static inline void flush_cache_mm(struct mm_struct *mm)
 {
 }
+#endif
 
+#ifndef flush_cache_dup_mm
 static inline void flush_cache_dup_mm(struct mm_struct *mm)
 {
 }
+#endif
 
+#ifndef flush_cache_range
 static inline void flush_cache_range(struct vm_area_struct *vma,
 				     unsigned long start,
 				     unsigned long end)
 {
 }
+#endif
 
+#ifndef flush_cache_page
 static inline void flush_cache_page(struct vm_area_struct *vma,
 				    unsigned long vmaddr,
 				    unsigned long pfn)
 {
 }
+#endif
 
+#ifndef flush_dcache_page
 static inline void flush_dcache_page(struct page *page)
 {
 }
+#endif
 
+#ifndef flush_dcache_mmap_lock
 static inline void flush_dcache_mmap_lock(struct address_space *mapping)
 {
 }
+#endif
 
+#ifndef flush_dcache_mmap_unlock
 static inline void flush_dcache_mmap_unlock(struct address_space *mapping)
 {
 }
+#endif
 
+#ifndef flush_icache_range
 static inline void flush_icache_range(unsigned long start, unsigned long end)
 {
 }
+#endif
 
+#ifndef flush_icache_page
 static inline void flush_icache_page(struct vm_area_struct *vma,
 				     struct page *page)
 {
 }
+#endif
 
+#ifndef flush_icache_user_range
 static inline void flush_icache_user_range(struct vm_area_struct *vma,
 					   struct page *page,
 					   unsigned long addr, int len)
 {
 }
+#endif
 
+#ifndef flush_cache_vmap
 static inline void flush_cache_vmap(unsigned long start, unsigned long end)
 {
 }
+#endif
 
+#ifndef flush_cache_vunmap
 static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
 {
 }
+#endif
 
-#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+#ifndef copy_to_user_page
+#define copy_to_user_page(vma, page, vaddr, dst, src, len)	\
 	do { \
 		memcpy(dst, src, len); \
 		flush_icache_user_range(vma, page, vaddr, len); \
 	} while (0)
+#endif
+
+#ifndef copy_from_user_page
 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 	memcpy(dst, src, len)
+#endif
 
 #endif /* __ASM_CACHEFLUSH_H */
diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
index afddc5442e92..365345f9a9e3 100644
--- a/include/asm-generic/export.h
+++ b/include/asm-generic/export.h
@@ -27,9 +27,11 @@
 .endm
 
 /*
- * note on .section use: @progbits vs %progbits nastiness doesn't matter,
- * since we immediately emit into those sections anyway.
+ * note on .section use: we specify progbits since usage of the "M" (SHF_MERGE)
+ * section flag requires it. Use '%progbits' instead of '@progbits' since the
+ * former apparently works on all arches according to the binutils source.
  */
+
 .macro ___EXPORT_SYMBOL name,val,sec
 #ifdef CONFIG_MODULES
 	.section ___ksymtab\sec+\name,"a"
@@ -37,7 +39,7 @@
 __ksymtab_\name:
 	__put \val, __kstrtab_\name
 	.previous
-	.section __ksymtab_strings,"a"
+	.section __ksymtab_strings,"aMS",%progbits,1
 __kstrtab_\name:
 	.asciz "\name"
 	.previous
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 325fc98cc9ff..d39ac997dda8 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -960,10 +960,6 @@ static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
 }
 #endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */
 
-#ifndef ioremap_nocache
-#define ioremap_nocache ioremap
-#endif
-
 #ifndef ioremap_wc
 #define ioremap_wc ioremap
 #endif
diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h
index a008f504a2d0..9d28a5e82f73 100644
--- a/include/asm-generic/iomap.h
+++ b/include/asm-generic/iomap.h
@@ -94,11 +94,11 @@ extern void ioport_unmap(void __iomem *);
 #endif
 
 #ifndef ARCH_HAS_IOREMAP_WC
-#define ioremap_wc ioremap_nocache
+#define ioremap_wc ioremap
 #endif
 
 #ifndef ARCH_HAS_IOREMAP_WT
-#define ioremap_wt ioremap_nocache
+#define ioremap_wt ioremap
 #endif
 
 #ifdef CONFIG_PCI
diff --git a/include/asm-generic/mm_hooks.h b/include/asm-generic/mm_hooks.h
index 6736ed2f632b..4dbb177d1150 100644
--- a/include/asm-generic/mm_hooks.h
+++ b/include/asm-generic/mm_hooks.h
@@ -22,11 +22,6 @@ static inline void arch_unmap(struct mm_struct *mm,
 {
 }
 
-static inline void arch_bprm_mm_init(struct mm_struct *mm,
-				     struct vm_area_struct *vma)
-{
-}
-
 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
 		bool write, bool execute, bool foreign)
 {
diff --git a/include/asm-generic/vdso/vsyscall.h b/include/asm-generic/vdso/vsyscall.h
index ce4103208619..cec543d9e87b 100644
--- a/include/asm-generic/vdso/vsyscall.h
+++ b/include/asm-generic/vdso/vsyscall.h
@@ -12,9 +12,9 @@ static __always_inline struct vdso_data *__arch_get_k_vdso_data(void)
 #endif /* __arch_get_k_vdso_data */
 
 #ifndef __arch_update_vdso_data
-static __always_inline int __arch_update_vdso_data(void)
+static __always_inline bool __arch_update_vdso_data(void)
 {
-	return 0;
+	return true;
 }
 #endif /* __arch_update_vdso_data */