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* simple_strto*: annotate function as obsoleteEldad Zack2012-12-171-0/+8
| | | | | | | | | | | | | | Update the documentation for simple_strto* to reflect that it has been obsoleted and advise the usage of kstrto*. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Joe Perches <joe@perches.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kstrto*: add documentationEldad Zack2012-12-171-0/+64
| | | | | | | | | | | | | | | As Bruce Fields pointed out, kstrto* is currently lacking kerneldoc comments. This patch adds kerneldoc comments to common variants of kstrto*: kstrto(u)l, kstrto(u)ll and kstrto(u)int. Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Joe Perches <joe@perches.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib/rbtree_test.c: fix uninitialized variable warningCong Ding2012-12-171-1/+1
| | | | | | | | | | | | Fix this warning: lib/rbtree_test.c: In function `check': lib/rbtree_test.c:121: warning: `blacks' may be used uninitialized in this function Signed-off-by: Cong Ding <dinggnu@gmail.com> Cc: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEMOleg Nesterov2012-12-172-1/+5
| | | | | | | | | | | | | | | | | Currently only block_dev and uprobes use percpu_rw_semaphore, add the config option selected by BLOCK || UPROBES. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Anton Arapov <anton@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_rw_semaphore: add lockdep annotationsOleg Nesterov2012-12-171-4/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add lockdep annotations. Not only this can help to find the potential problems, we do not want the false warnings if, say, the task takes two different percpu_rw_semaphore's for reading. IOW, at least ->rw_sem should not use a single class. This patch exposes this internal lock to lockdep so that it represents the whole percpu_rw_semaphore. This way we do not need to add another "fake" ->lockdep_map and lock_class_key. More importantly, this also makes the output from lockdep much more understandable if it finds the problem. In short, with this patch from lockdep pov percpu_down_read() and percpu_up_read() acquire/release ->rw_sem for reading, this matches the actual semantics. This abuses __up_read() but I hope this is fine and in fact I'd like to have down_read_no_lockdep() as well, percpu_down_read_recursive_readers() will need it. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Anton Arapov <anton@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_rw_semaphore: kill ->writer_mutex, add ->write_ctrOleg Nesterov2012-12-171-18/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | percpu_rw_semaphore->writer_mutex was only added to simplify the initial rewrite, the only thing it protects is clear_fast_ctr() which otherwise could be called by multiple writers. ->rw_sem is enough to serialize the writers. Kill this mutex and add "atomic_t write_ctr" instead. The writers increment/decrement this counter, the readers check it is zero instead of mutex_is_locked(). Move atomic_add(clear_fast_ctr(), slow_read_ctr) under down_write() to avoid the race with other writers. This is a bit sub-optimal, only the first writer needs this and we do not need to exclude the readers at this stage. But this is simple, we do not want another internal lock until we add more features. And this speeds up the write-contended case. Before this patch the racing writers sleep in synchronize_sched_expedited() sequentially, with this patch multiple synchronize_sched_expedited's can "overlap" with each other. Note: we can do more optimizations, this is only the first step. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Anton Arapov <anton@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* percpu_rw_semaphore: reimplement to not block the readers unnecessarilyOleg Nesterov2012-12-172-1/+155
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the writer does msleep() plus synchronize_sched() 3 times to acquire/release the semaphore, and during this time the readers are blocked completely. Even if the "write" section was not actually started or if it was already finished. With this patch down_write/up_write does synchronize_sched() twice and down_read/up_read are still possible during this time, just they use the slow path. percpu_down_write() first forces the readers to use rw_semaphore and increment the "slow" counter to take the lock for reading, then it takes that rw_semaphore for writing and blocks the readers. Also. With this patch the code relies on the documented behaviour of synchronize_sched(), it doesn't try to pair synchronize_sched() with barrier. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anton Arapov <anton@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sscanf: don't ignore field widths for numeric conversionsJan Beulich2012-12-171-43/+53
| | | | | | | | | | | | | | | | | | This is another step towards better standard conformance. Rather than adding a local buffer to store the specified portion of the string (with the need to enforce an arbitrary maximum supported width to limit the buffer size), do a maximum width conversion and then drop as much of it as is necessary to meet the caller's request. Also fail on negative field widths. Uses the deprecated simple_strto*() functions because kstrtoXX() fail on non-zero terminated strings. Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib: dynamic_debug: use kbasename()Andy Shevchenko2012-12-171-8/+1
| | | | | | | | | Remove the custom implementation of the functionality similar to kbasename(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Jason Baron <jbaron@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib/vsprintf.c: fix handling of %zd when using ssize_tJason Gunthorpe2012-12-171-1/+4
| | | | | | | | | | | | | | | | | Documentation/printk-formats.txt says to use %zd for a ssize_t argument and some drivers do. Unfortunately this prints a positive number for negative values eg: tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error 4294967234 Add a case to va_args a ssize_t type if the interpretation should be signed. Tested on PPC32. Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'stable/for-linus-3.8-rc0-tag' of ↵Linus Torvalds2012-12-161-130/+139
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb Pull swiotlb update from Konrad Rzeszutek Wilk: "Feature: - Use dma addresses instead of the virt_to_phys and vice versa functions. Remove the multitude of phys_to_virt/virt_to_phys calls and instead operate on the physical addresses instead of virtual in many of the internal functions. This does provide a speed up in interrupt handlers that do DMA operations and use SWIOTLB." * tag 'stable/for-linus-3.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb: swiotlb: Do not export swiotlb_bounce since there are no external consumers swiotlb: Use physical addresses instead of virtual in swiotlb_tbl_sync_single swiotlb: Use physical addresses for swiotlb_tbl_unmap_single swiotlb: Return physical addresses when calling swiotlb_tbl_map_single swiotlb: Make io_tlb_overflow_buffer a physical address swiotlb: Make io_tlb_start a physical address instead of a virtual one swiotlb: Make io_tlb_end a physical address instead of a virtual one
| * swiotlb: Do not export swiotlb_bounce since there are no external consumersAlexander Duyck2012-10-301-19/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently swiotlb is the only consumer for swiotlb_bounce. Since that is the case it doesn't make much sense to be exporting it so make it a static function only. In addition we can save a few more lines of code by making it so that it accepts the DMA address as a physical address instead of a virtual one. This is the last piece in essentially pushing all of the DMA address values to use physical addresses in swiotlb. In order to clarify things since we now have 2 physical addresses in use inside of swiotlb_bounce I am renaming phys to orig_addr, and dma_addr to tlb_addr. This way is should be clear that orig_addr is contained within io_orig_addr and tlb_addr is an address within the io_tlb_addr buffer. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb: Use physical addresses instead of virtual in swiotlb_tbl_sync_singleAlexander Duyck2012-10-301-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change makes it so that the sync functionality also uses physical addresses. This helps to further reduce the use of virt_to_phys and phys_to_virt functions. In order to clarify things since we now have 2 physical addresses in use inside of swiotlb_tbl_sync_single I am renaming phys to orig_addr, and dma_addr to tlb_addr. This way is should be clear that orig_addr is contained within io_orig_addr and tlb_addr is an address within the io_tlb_addr buffer. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb: Use physical addresses for swiotlb_tbl_unmap_singleAlexander Duyck2012-10-301-18/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change makes it so that the unmap functionality also uses physical addresses. This helps to further reduce the use of virt_to_phys and phys_to_virt functions. In order to clarify things since we now have 2 physical addresses in use inside of swiotlb_tbl_unmap_single I am renaming phys to orig_addr, and dma_addr to tlb_addr. This way is should be clear that orig_addr is contained within io_orig_addr and tlb_addr is an address within the io_tlb_addr buffer. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb: Return physical addresses when calling swiotlb_tbl_map_singleAlexander Duyck2012-10-301-38/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change makes it so that swiotlb_tbl_map_single will return a physical address instead of a virtual address when called. The advantage to this once again is that we are avoiding a number of virt_to_phys and phys_to_virt translations by working with everything as a physical address. One change I had to make in order to support using physical addresses is that I could no longer trust 0 to be a invalid physical address on all platforms. So instead I made it so that ~0 is returned on error. This should never be a valid return value as it implies that only one byte would be available for use. In order to clarify things since we now have 2 physical addresses in use inside of swiotlb_tbl_map_single I am renaming phys to orig_addr, and dma_addr to tlb_addr. This way is should be clear that orig_addr is contained within io_orig_addr and tlb_addr is an address within the io_tlb_addr buffer. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb: Make io_tlb_overflow_buffer a physical addressAlexander Duyck2012-10-301-27/+34
| | | | | | | | | | | | | | | | | | | | | | This change makes it so that we can avoid virt_to_phys overhead when using the io_tlb_overflow_buffer. My original plan was to completely remove the value and replace it with a constant but I had seen that there were recent patches that stated this couldn't be done until all device drivers that depended on that functionality be updated. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb: Make io_tlb_start a physical address instead of a virtual oneAlexander Duyck2012-10-301-29/+29
| | | | | | | | | | | | | | | | | | | | | | This change replaces all references to the virtual address for io_tlb_start with references to the physical address io_tlb_end. The main advantage of replacing the virtual address with a physical address is that we can avoid having to do multiple translations from the virtual address to the physical one needed for testing an existing DMA address. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb: Make io_tlb_end a physical address instead of a virtual oneAlexander Duyck2012-10-301-11/+13
| | | | | | | | | | | | | | | | | | | | | | This change replaces all references to the virtual address for io_tlb_end with references to the physical address io_tlb_end. The main advantage of replacing the virtual address with a physical address is that we can avoid having to do multiple translations from the virtual address to the physical one needed for testing an existing DMA address. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | Merge branch 'x86-acpi-for-linus' of ↵Linus Torvalds2012-12-142-1/+147
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 ACPI update from Peter Anvin: "This is a patchset which didn't make the last merge window. It adds a debugging capability to feed ACPI tables via the initramfs. On a grander scope, it formalizes using the initramfs protocol for feeding arbitrary blobs which need to be accessed early to the kernel: they are fed first in the initramfs blob (lots of bootloaders can concatenate this at boot time, others can use a single file) in an uncompressed cpio archive using filenames starting with "kernel/". The ACPI maintainers requested that this patchset be fed via the x86 tree rather than the ACPI tree as the footprint in the general x86 code is much bigger than in the ACPI code proper." * 'x86-acpi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: X86 ACPI: Use #ifdef not #if for CONFIG_X86 check ACPI: Fix build when disabled ACPI: Document ACPI table overriding via initrd ACPI: Create acpi_table_taint() function to avoid code duplication ACPI: Implement physical address table override ACPI: Store valid ACPI tables passed via early initrd in reserved memblock areas x86, acpi: Introduce x86 arch specific arch_reserve_mem_area() for e820 handling lib: Add early cpio decoder
| * | lib: Add early cpio decoderH. Peter Anvin2012-09-302-1/+146
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1349043837-22659-2-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2012-12-132-6/+6
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial branch from Jiri Kosina: "Usual stuff -- comment/printk typo fixes, documentation updates, dead code elimination." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) HOWTO: fix double words typo x86 mtrr: fix comment typo in mtrr_bp_init propagate name change to comments in kernel source doc: Update the name of profiling based on sysfs treewide: Fix typos in various drivers treewide: Fix typos in various Kconfig wireless: mwifiex: Fix typo in wireless/mwifiex driver messages: i2o: Fix typo in messages/i2o scripts/kernel-doc: check that non-void fcts describe their return value Kernel-doc: Convention: Use a "Return" section to describe return values radeon: Fix typo and copy/paste error in comments doc: Remove unnecessary declarations from Documentation/accounting/getdelays.c various: Fix spelling of "asynchronous" in comments. Fix misspellings of "whether" in comments. eisa: Fix spelling of "asynchronous". various: Fix spelling of "registered" in comments. doc: fix quite a few typos within Documentation target: iscsi: fix comment typos in target/iscsi drivers treewide: fix typo of "suport" in various comments and Kconfig treewide: fix typo of "suppport" in various comments ...
| * | | propagate name change to comments in kernel sourceNadia Yvette Chambers2012-12-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've legally changed my name with New York State, the US Social Security Administration, et al. This patch propagates the name change and change in initials and login to comments in the kernel source as well. Signed-off-by: Nadia Yvette Chambers <nyc@holomorphy.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * | | treewide: Fix typos in various KconfigMasanari Iida2012-12-031-5/+5
| | |/ | |/| | | | | | | | | | | | | | | | Correct spelling typo within various Kconfig. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | Merge branch 'core-rcu-for-linus' of ↵Linus Torvalds2012-12-111-1/+1
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull RCU update from Ingo Molnar: "The major features of this tree are: 1. A first version of no-callbacks CPUs. This version prohibits offlining CPU 0, but only when enabled via CONFIG_RCU_NOCB_CPU=y. Relaxing this constraint is in progress, but not yet ready for prime time. These commits were posted to LKML at https://lkml.org/lkml/2012/10/30/724. 2. Changes to SRCU that allows statically initialized srcu_struct structures. These commits were posted to LKML at https://lkml.org/lkml/2012/10/30/296. 3. Restructuring of RCU's debugfs output. These commits were posted to LKML at https://lkml.org/lkml/2012/10/30/341. 4. Additional CPU-hotplug/RCU improvements, posted to LKML at https://lkml.org/lkml/2012/10/30/327. Note that the commit eliminating __stop_machine() was judged to be too-high of risk, so is deferred to 3.9. 5. Changes to RCU's idle interface, most notably a new module parameter that redirects normal grace-period operations to their expedited equivalents. These were posted to LKML at https://lkml.org/lkml/2012/10/30/739. 6. Additional diagnostics for RCU's CPU stall warning facility, posted to LKML at https://lkml.org/lkml/2012/10/30/315. The most notable change reduces the default RCU CPU stall-warning time from 60 seconds to 21 seconds, so that it once again happens sooner than the softlockup timeout. 7. Documentation updates, which were posted to LKML at https://lkml.org/lkml/2012/10/30/280. A couple of late-breaking changes were posted at https://lkml.org/lkml/2012/11/16/634 and https://lkml.org/lkml/2012/11/16/547. 8. Miscellaneous fixes, which were posted to LKML at https://lkml.org/lkml/2012/10/30/309. 9. Finally, a fix for an lockdep-RCU splat was posted to LKML at https://lkml.org/lkml/2012/11/7/486." * 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (49 commits) context_tracking: New context tracking susbsystem sched: Mark RCU reader in sched_show_task() rcu: Separate accounting of callbacks from callback-free CPUs rcu: Add callback-free CPUs rcu: Add documentation for the new rcuexp debugfs trace file rcu: Update documentation for TREE_RCU debugfs tracing rcu: Reduce default RCU CPU stall warning timeout rcu: Fix TINY_RCU rcu_is_cpu_rrupt_from_idle check rcu: Clarify memory-ordering properties of grace-period primitives rcu: Add new rcutorture module parameters to start/end test messages rcu: Remove list_for_each_continue_rcu() rcu: Fix batch-limit size problem rcu: Add tracing for synchronize_sched_expedited() rcu: Remove old debugfs interfaces and also RCU flavor name rcu: split 'rcuhier' to each flavor rcu: split 'rcugp' to each flavor rcu: split 'rcuboost' to each flavor rcu: split 'rcubarrier' to each flavor rcu: Fix tracing formatting rcu: Remove the interface "rcudata.csv" ...
| * \ \ Merge branch 'rcu/next' of ↵Ingo Molnar2012-12-031-1/+1
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu Conflicts: arch/x86/kernel/ptrace.c Pull the latest RCU tree from Paul E. McKenney: " The major features of this series are: 1. A first version of no-callbacks CPUs. This version prohibits offlining CPU 0, but only when enabled via CONFIG_RCU_NOCB_CPU=y. Relaxing this constraint is in progress, but not yet ready for prime time. These commits were posted to LKML at https://lkml.org/lkml/2012/10/30/724, and are at branch rcu/nocb. 2. Changes to SRCU that allows statically initialized srcu_struct structures. These commits were posted to LKML at https://lkml.org/lkml/2012/10/30/296, and are at branch rcu/srcu. 3. Restructuring of RCU's debugfs output. These commits were posted to LKML at https://lkml.org/lkml/2012/10/30/341, and are at branch rcu/tracing. 4. Additional CPU-hotplug/RCU improvements, posted to LKML at https://lkml.org/lkml/2012/10/30/327, and are at branch rcu/hotplug. Note that the commit eliminating __stop_machine() was judged to be too-high of risk, so is deferred to 3.9. 5. Changes to RCU's idle interface, most notably a new module parameter that redirects normal grace-period operations to their expedited equivalents. These were posted to LKML at https://lkml.org/lkml/2012/10/30/739, and are at branch rcu/idle. 6. Additional diagnostics for RCU's CPU stall warning facility, posted to LKML at https://lkml.org/lkml/2012/10/30/315, and are at branch rcu/stall. The most notable change reduces the default RCU CPU stall-warning time from 60 seconds to 21 seconds, so that it once again happens sooner than the softlockup timeout. 7. Documentation updates, which were posted to LKML at https://lkml.org/lkml/2012/10/30/280, and are at branch rcu/doc. A couple of late-breaking changes were posted at https://lkml.org/lkml/2012/11/16/634 and https://lkml.org/lkml/2012/11/16/547. 8. Miscellaneous fixes, which were posted to LKML at https://lkml.org/lkml/2012/10/30/309, along with a late-breaking change posted at Fri, 16 Nov 2012 11:26:25 -0800 with message-ID <20121116192625.GA447@linux.vnet.ibm.com>, but which lkml.org seems to have missed. These are at branch rcu/fixes. 9. Finally, a fix for an lockdep-RCU splat was posted to LKML at https://lkml.org/lkml/2012/11/7/486. This is at rcu/next. " Signed-off-by: Ingo Molnar <mingo@kernel.org>
| | * | | rcu: Reduce default RCU CPU stall warning timeoutPaul E. McKenney2012-11-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RCU CPU stall warning timeout has defaulted to 60 seconds for some years, with almost no false positives. This commit therefore reduces the default to 21 seconds, slightly shorter than the new soft-lockup timeout. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* | | | | Merge branch 'akpm' (Andrew's patchbomb)Linus Torvalds2012-12-111-1/+1
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge misc updates from Andrew Morton: "About half of most of MM. Going very early this time due to uncertainty over the coreautounifiednumasched things. I'll send the other half of most of MM tomorrow. The rest of MM awaits a slab merge from Pekka." * emailed patches from Andrew Morton: (71 commits) memory_hotplug: ensure every online node has NORMAL memory memory_hotplug: handle empty zone when online_movable/online_kernel mm, memory-hotplug: dynamic configure movable memory and portion memory drivers/base/node.c: cleanup node_state_attr[] bootmem: fix wrong call parameter for free_bootmem() avr32, kconfig: remove HAVE_ARCH_BOOTMEM mm: cma: remove watermark hacks mm: cma: skip watermarks check for already isolated blocks in split_free_page() mm, oom: fix race when specifying a thread as the oom origin mm, oom: change type of oom_score_adj to short mm: cleanup register_node() mm, mempolicy: remove duplicate code mm/vmscan.c: try_to_freeze() returns boolean mm: introduce putback_movable_pages() virtio_balloon: introduce migration primitives to balloon pages mm: introduce compaction and migration for ballooned pages mm: introduce a common interface for balloon pages mobility mm: redefine address_space.assoc_mapping mm: adjust address_space_operations.migratepage() return code arch/sparc/kernel/sys_sparc_64.c: s/COLOUR/COLOR/ ...
| * | | | | bootmem: fix wrong call parameter for free_bootmem()Joonsoo Kim2012-12-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is strange that alloc_bootmem() returns a virtual address and free_bootmem() requires a physical address. Anyway, free_bootmem()'s first parameter should be physical address. There are some call sites for free_bootmem() with virtual address. So fix them. [akpm@linux-foundation.org: improve free_bootmem() and free_bootmem_pate() documentation] Signed-off-by: Joonsoo Kim <js1304@gmail.com> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | | Merge tag 'driver-core-3.8-rc1' of ↵Linus Torvalds2012-12-111-2/+1
|\ \ \ \ \ \ | |/ / / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg Kroah-Hartman: "Here's the large driver core updates for 3.8-rc1. The biggest thing here is the various __dev* marking removals. This is going to be a pain for the merge with different subsystem trees, I know, but all of the patches included here have been ACKed by their various subsystem maintainers, as they wanted them to go through here. If this is too much of a pain, I can pull all of them out of this tree and just send you one with the other fixes/updates and then, after 3.8-rc1 is out, do the rest of the removals to ensure we catch them all, it's up to you. The merges should all be trivial, and Stephen has been doing them all in linux-next for a few weeks now quite easily. Other than the __dev* marking removals, there's nothing major here, some firmware loading updates and other minor things in the driver core. All of these have (much to Stephen's annoyance), been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" Fixed up trivial conflicts in drivers/gpio/gpio-{em,stmpe}.c due to gpio update. * tag 'driver-core-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (93 commits) modpost.c: Stop checking __dev* section mismatches init.h: Remove __dev* sections from the kernel acpi: remove use of __devinit PCI: Remove __dev* markings PCI: Always build setup-bus when PCI is enabled PCI: Move pci_uevent into pci-driver.c PCI: Remove CONFIG_HOTPLUG ifdefs unicore32/PCI: Remove CONFIG_HOTPLUG ifdefs sh/PCI: Remove CONFIG_HOTPLUG ifdefs powerpc/PCI: Remove CONFIG_HOTPLUG ifdefs mips/PCI: Remove CONFIG_HOTPLUG ifdefs microblaze/PCI: Remove CONFIG_HOTPLUG ifdefs dma: remove use of __devinit dma: remove use of __devexit_p firewire: remove use of __devinitdata firewire: remove use of __devinit leds: remove use of __devexit leds: remove use of __devinit leds: remove use of __devexit_p mmc: remove use of __devexit ...
| * | | | | lib: kobject_uevent is no longer dependant on CONFIG_HOTPLUGBill Pemberton2012-11-281-2/+1
| | |_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is being removed so kobject_uevent needs to always be part of the library. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | | | | lib/Makefile: Fix oid_registry build dependencyTim Gardner2012-12-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is $(obj)/oid_registry.o that is dependent on $(obj)/oid_registry_data.c. The object file cannot be built until $(obj)/oid_registry_data.c has been generated. A periodic and hard to reproduce parallel build failure is due to this incorrect lib/Makefile dependency. The compile error is completely disingenuous. GEN lib/oid_registry_data.c Compiling 49 OIDs CC lib/oid_registry.o gcc: error: lib/oid_registry.c: No such file or directory gcc: fatal error: no input files compilation terminated. make[3]: *** [lib/oid_registry.o] Error 4 Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: Michel Lespinasse <walken@google.com> Cc: David Howells <dhowells@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | | | | ASN.1: Fix an indefinite length skip errorDavid Howells2012-12-051-1/+1
| |/ / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix an error in asn1_find_indefinite_length() whereby small definite length elements of size 0x7f are incorrecly classified as non-small. Without this fix, an error will be given as the length of the length will be perceived as being very much greater than the maximum supported size. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | | | MPI: Fix compilation on MIPS with GCC 4.4 and newerManuel Lauss2012-11-231-2/+17
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since 4.4 GCC on MIPS no longer recognizes the "h" constraint, leading to this build failure: CC lib/mpi/generic_mpih-mul1.o lib/mpi/generic_mpih-mul1.c: In function 'mpihelp_mul_1': lib/mpi/generic_mpih-mul1.c:50:3: error: impossible constraint in 'asm' This patch updates MPI with the latest umul_ppm implementations for MIPS. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Cc: Dmitry Kasatkin <dmitry.kasatkin@intel.com> Cc: James Morris <jmorris@namei.org> Patchwork: https://patchwork.linux-mips.org/patch/4612/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | genalloc: stop crashing the system when destroying a poolThadeu Lima de Souza Cascardo2012-10-251-1/+1
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The genalloc code uses the bitmap API from include/linux/bitmap.h and lib/bitmap.c, which is based on long values. Both bitmap_set from lib/bitmap.c and bitmap_set_ll, which is the lockless version from genalloc.c, use BITMAP_LAST_WORD_MASK to set the first bits in a long in the bitmap. That one uses (1 << bits) - 1, 0b111, if you are setting the first three bits. This means that the API counts from the least significant bits (LSB from now on) to the MSB. The LSB in the first long is bit 0, then. The same works for the lookup functions. The genalloc code uses longs for the bitmap, as it should. In include/linux/genalloc.h, struct gen_pool_chunk has unsigned long bits[0] as its last member. When allocating the struct, genalloc should reserve enough space for the bitmap. This should be a proper number of longs that can fit the amount of bits in the bitmap. However, genalloc allocates an integer number of bytes that fit the amount of bits, but may not be an integer amount of longs. 9 bytes, for example, could be allocated for 70 bits. This is a problem in itself if the Least Significat Bit in a long is in the byte with the largest address, which happens in Big Endian machines. This means genalloc is not allocating the byte in which it will try to set or check for a bit. This may end up in memory corruption, where genalloc will try to set the bits it has not allocated. In fact, genalloc may not set these bits because it may find them already set, because they were not zeroed since they were not allocated. And that's what causes a BUG when gen_pool_destroy is called and check for any set bits. What really happens is that genalloc uses kmalloc_node with __GFP_ZERO on gen_pool_add_virt. With SLAB and SLUB, this means the whole slab will be cleared, not only the requested bytes. Since struct gen_pool_chunk has a size that is a multiple of 8, and slab sizes are multiples of 8, we get lucky and allocate and clear the right amount of bytes. Hower, this is not the case with SLOB or with older code that did memset after allocating instead of using __GFP_ZERO. So, a simple module as this (running 3.6.0), will cause a crash when rmmod'ed. [root@phantom-lp2 foo]# cat foo.c #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/genalloc.h> MODULE_LICENSE("GPL"); MODULE_VERSION("0.1"); static struct gen_pool *foo_pool; static __init int foo_init(void) { int ret; foo_pool = gen_pool_create(10, -1); if (!foo_pool) return -ENOMEM; ret = gen_pool_add(foo_pool, 0xa0000000, 32 << 10, -1); if (ret) { gen_pool_destroy(foo_pool); return ret; } return 0; } static __exit void foo_exit(void) { gen_pool_destroy(foo_pool); } module_init(foo_init); module_exit(foo_exit); [root@phantom-lp2 foo]# zcat /proc/config.gz | grep SLOB CONFIG_SLOB=y [root@phantom-lp2 foo]# insmod ./foo.ko [root@phantom-lp2 foo]# rmmod foo ------------[ cut here ]------------ kernel BUG at lib/genalloc.c:243! cpu 0x4: Vector: 700 (Program Check) at [c0000000bb0e7960] pc: c0000000003cb50c: .gen_pool_destroy+0xac/0x110 lr: c0000000003cb4fc: .gen_pool_destroy+0x9c/0x110 sp: c0000000bb0e7be0 msr: 8000000000029032 current = 0xc0000000bb0e0000 paca = 0xc000000006d30e00 softe: 0 irq_happened: 0x01 pid = 13044, comm = rmmod kernel BUG at lib/genalloc.c:243! [c0000000bb0e7ca0] d000000004b00020 .foo_exit+0x20/0x38 [foo] [c0000000bb0e7d20] c0000000000dff98 .SyS_delete_module+0x1a8/0x290 [c0000000bb0e7e30] c0000000000097d4 syscall_exit+0x0/0x94 --- Exception: c00 (System Call) at 000000800753d1a0 SP (fffd0b0e640) is in userspace Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Benjamin Gaignard <benjamin.gaignard@stericsson.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | lib/dma-debug.c: fix __hash_bucket_find()Ming Lei2012-10-191-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If there is only one match, the unique matched entry should be returned. Without the fix, the upcoming dma debug interfaces ("dma-debug: new interfaces to debug dma mapping errors") can't work reliably because only device and dma_addr are passed to dma_mapping_error(). Signed-off-by: Ming Lei <ming.lei@canonical.com> Reported-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Joerg Roedel <joerg.roedel@amd.com> Tested-by: Shuah Khan <shuah.khan@hp.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Jakub Kicinski <kubakici@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'modules-next' of ↵Linus Torvalds2012-10-1412-140/+1021
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module signing support from Rusty Russell: "module signing is the highlight, but it's an all-over David Howells frenzy..." Hmm "Magrathea: Glacier signing key". Somebody has been reading too much HHGTTG. * 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (37 commits) X.509: Fix indefinite length element skip error handling X.509: Convert some printk calls to pr_devel asymmetric keys: fix printk format warning MODSIGN: Fix 32-bit overflow in X.509 certificate validity date checking MODSIGN: Make mrproper should remove generated files. MODSIGN: Use utf8 strings in signer's name in autogenerated X.509 certs MODSIGN: Use the same digest for the autogen key sig as for the module sig MODSIGN: Sign modules during the build process MODSIGN: Provide a script for generating a key ID from an X.509 cert MODSIGN: Implement module signature checking MODSIGN: Provide module signing public keys to the kernel MODSIGN: Automatically generate module signing keys if missing MODSIGN: Provide Kconfig options MODSIGN: Provide gitignore and make clean rules for extra files MODSIGN: Add FIPS policy module: signature checking hook X.509: Add a crypto key parser for binary (DER) X.509 certificates MPILIB: Provide a function to read raw data into an MPI X.509: Add an ASN.1 decoder X.509: Add simple ASN.1 grammar compiler ...
| * | X.509: Fix indefinite length element skip error handlingDavid Howells2012-10-101-9/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | asn1_find_indefinite_length() returns an error indicator of -1, which the caller asn1_ber_decoder() places in a size_t (which is usually unsigned) and then checks to see whether it is less than 0 (which it can't be). This can lead to the following warning: lib/asn1_decoder.c:320 asn1_ber_decoder() warn: unsigned 'len' is never less than zero. Instead, asn1_find_indefinite_length() update the caller's idea of the data cursor and length separately from returning the error code. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | MPILIB: Provide a function to read raw data into an MPIDavid Howells2012-10-081-0/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide a function to read raw data of a predetermined size into an MPI rather than expecting the size to be encoded within the data. The data is assumed to represent an unsigned integer, and the resulting MPI will be positive. The function looks like this: MPI mpi_read_raw_data(const void *, size_t); This is useful for reading ASN.1 integer primitives where the length is encoded in the ASN.1 metadata. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | X.509: Add an ASN.1 decoderDavid Howells2012-10-082-0/+479
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an ASN.1 BER/DER/CER decoder. This uses the bytecode from the ASN.1 compiler in the previous patch to inform it as to what to expect to find in the encoded byte stream. The output from the compiler also tells it what functions to call on what tags, thus allowing the caller to retrieve information. The decoder is called as follows: int asn1_decoder(const struct asn1_decoder *decoder, void *context, const unsigned char *data, size_t datalen); The decoder argument points to the bytecode from the ASN.1 compiler. context is the caller's context and is passed to the action functions. data and datalen define the byte stream to be decoded. Note that the decoder is currently limited to datalen being less than 64K. This reduces the amount of stack space used by the decoder because ASN.1 is a nested construct. Similarly, the decoder is limited to a maximum of 10 levels of constructed data outside of a leaf node also in an effort to keep stack usage down. These restrictions can be raised if necessary. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | X.509: Add utility functions to render OIDs as stringsDavid Howells2012-10-081-0/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a pair of utility functions to render OIDs as strings. The first takes an encoded OID and turns it into a "a.b.c.d" form string: int sprint_oid(const void *data, size_t datasize, char *buffer, size_t bufsize); The second takes an OID enum index and calls the first on the data held therein: int sprint_OID(enum OID oid, char *buffer, size_t bufsize); Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | X.509: Implement simple static OID registryDavid Howells2012-10-085-1/+320
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement a simple static OID registry that allows the mapping of an encoded OID to an enum value for ease of use. The OID registry index enum appears in the: linux/oid_registry.h header file. A script generates the registry from lines in the header file that look like: <sp*>OID_foo,<sp*>/*<sp*>1.2.3.4<sp*>*/ The actual OID is taken to be represented by the numbers with interpolated dots in the comment. All other lines in the header are ignored. The registry is queries by calling: OID look_up_oid(const void *data, size_t datasize); This returns a number from the registry enum representing the OID if found or OID__NR if not. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | MPILIB: Reinstate mpi_cmp[_ui]() and export for RSA signature verificationDavid Howells2012-10-082-0/+71
| | | | | | | | | | | | | | | | | | | | | | | | Reinstate and export mpi_cmp() and mpi_cmp_ui() from the MPI library for use by RSA signature verification as per RFC3447 section 5.2.2 step 1. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| * | MPILIB: Provide count_leading/trailing_zeros() based on arch functionsDavid Howells2012-10-083-139/+5
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide count_leading/trailing_zeros() macros based on extant arch bit scanning functions rather than reimplementing from scratch in MPILIB. Whilst we're at it, turn count_foo_zeros(n, x) into n = count_foo_zeros(x). Also move the definition to asm-generic as other people may be interested in using it. Signed-off-by: David Howells <dhowells@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Dmitry Kasatkin <dmitry.kasatkin@intel.com> Cc: Arnd Bergmann <arnd@arndb.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | Merge branch 'akpm' (Fixups from Andrew)Linus Torvalds2012-10-111-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge misc fixes from Andrew Morton: "Followups, fixes and some random stuff I found on the internet." * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (11 patches) perf: fix duplicate header inclusion memcg, kmem: fix build error when CONFIG_INET is disabled rtc: kconfig: fix RTC_INTF defaults connected to RTC_CLASS rapidio: fix comment lib/kasprintf.c: use kmalloc_track_caller() to get accurate traces for kvasprintf rapidio: update for destination ID allocation rapidio: update asynchronous discovery initialization rapidio: use msleep in discovery wait mm: compaction: fix bit ranges in {get,clear,set}_pageblock_skip() arch/powerpc/platforms/pseries/hotplug-memory.c: section removal cleanups arch/powerpc/platforms/pseries/hotplug-memory.c: fix section handling code
| * | lib/kasprintf.c: use kmalloc_track_caller() to get accurate traces for ↵Ezequiel Garcia2012-10-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kvasprintf Previously kvasprintf() allocation was being done through kmalloc(), thus producing an inaccurate trace report. This is a common problem: in order to get accurate callsite tracing, a lib/utils function shouldn't allocate kmalloc but instead use kmalloc_track_caller. Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-blockLinus Torvalds2012-10-111-0/+19
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull block IO update from Jens Axboe: "Core block IO bits for 3.7. Not a huge round this time, it contains: - First series from Kent cleaning up and generalizing bio allocation and freeing. - WRITE_SAME support from Martin. - Mikulas patches to prevent O_DIRECT crashes when someone changes the block size of a device. - Make bio_split() work on data-less bio's (like trim/discards). - A few other minor fixups." Fixed up silent semantic mis-merge as per Mikulas Patocka and Andrew Morton. It is due to the VM no longer using a prio-tree (see commit 6b2dbba8b6ac: "mm: replace vma prio_tree with an interval tree"). So make set_blocksize() use mapping_mapped() instead of open-coding the internal VM knowledge that has changed. * 'for-3.7/core' of git://git.kernel.dk/linux-block: (26 commits) block: makes bio_split support bio without data scatterlist: refactor the sg_nents scatterlist: add sg_nents fs: fix include/percpu-rwsem.h export error percpu-rw-semaphore: fix documentation typos fs/block_dev.c:1644:5: sparse: symbol 'blkdev_mmap' was not declared blockdev: turn a rw semaphore into a percpu rw semaphore Fix a crash when block device is read and block size is changed at the same time block: fix request_queue->flags initialization block: lift the initial queue bypass mode on blk_register_queue() instead of blk_init_allocated_queue() block: ioctl to zero block ranges block: Make blkdev_issue_zeroout use WRITE SAME block: Implement support for WRITE SAME block: Consolidate command flag and queue limit checks for merges block: Clean up special command handling logic block/blk-tag.c: Remove useless kfree block: remove the duplicated setting for congestion_threshold block: reject invalid queue attribute values block: Add bio_clone_bioset(), bio_clone_kmalloc() block: Consolidate bio_alloc_bioset(), bio_kmalloc() ...
| * | scatterlist: refactor the sg_nentsMaxim Levitsky2012-09-281-5/+2
| | | | | | | | | | | | | | | | | | | | | Replace 'while' with 'for' as suggested by Tejun Heo Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
| * | scatterlist: add sg_nentsMaxim Levitsky2012-09-271-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Useful helper to know the number of entries in scatterlist. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Alex Dubov <oakad@yahoo.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* | | mm: add CONFIG_DEBUG_VM_RB build optionMichel Lespinasse2012-10-091-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a CONFIG_DEBUG_VM_RB build option for the previously existing DEBUG_MM_RB code. Now that Andi Kleen modified it to avoid using recursive algorithms, we can expose it a bit more. Also extend this code to validate_mm() after stack expansion, and to check that the vma's start and last pgoffs have not changed since the nodes were inserted on the anon vma interval tree (as it is important that the nodes be reindexed after each such update). Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Daniel Santos <daniel.santos@pobox.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | mm: interval tree updatesMichel Lespinasse2012-10-091-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the generic interval tree code that was introduced in "mm: replace vma prio_tree with an interval tree". Changes: - fixed 'endpoing' typo noticed by Andrew Morton - replaced include/linux/interval_tree_tmpl.h, which was used as a template (including it automatically defined the interval tree functions) with include/linux/interval_tree_generic.h, which only defines a preprocessor macro INTERVAL_TREE_DEFINE(), which itself defines the interval tree functions when invoked. Now that is a very long macro which is unfortunate, but it does make the usage sites (lib/interval_tree.c and mm/interval_tree.c) a bit nicer than previously. - make use of RB_DECLARE_CALLBACKS() in the INTERVAL_TREE_DEFINE() macro, instead of duplicating that code in the interval tree template. - replaced vma_interval_tree_add(), which was actually handling the nonlinear and interval tree cases, with vma_interval_tree_insert_after() which handles only the interval tree case and has an API that is more consistent with the other interval tree handling functions. The nonlinear case is now handled explicitly in kernel/fork.c dup_mmap(). Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Daniel Santos <daniel.santos@pobox.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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