- 15 Nov, 2013 40 commits
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Christoph Hellwig authored
Make this useful helper available for other users. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@kernel.dk> Cc: Neil Brown <neilb@suse.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Christoph Hellwig authored
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Andrew Morton authored
x86_64 allnoconfig: kernel/up.c:25: error: redefinition of '__smp_call_function_single' include/linux/smp.h:154: note: previous definition of '__smp_call_function_single' was here Cc: Christoph Hellwig <hch@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Christoph Hellwig authored
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Christoph Hellwig authored
We've switched over every architecture that supports SMP to it, so remove the new useless config variable. Signed-off-by:
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Christoph Hellwig authored
This commit was incomplete in that code to remove items from the per-cpu lists was missing and never acquired a user in the 5 years it has been in the tree. We're going to implement what it seems to try to archive in a simpler way, and this code is in the way of doing so. Signed-off-by:
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Jingoo Han authored
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Acked-by:
Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Wolfram Sang authored
All users are converted over to reinit_completion(). Remove the old macro now. Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Wolfram Sang authored
Use this new function to make code more comprehensible, since we are reinitialzing the completion, not initializing. [akpm@linux-foundation.org: linux-next resyncs] Signed-off-by:
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Wolfram Sang authored
For the casual device driver writer, it is hard to remember when to use init_completion (to init a completion structure) or INIT_COMPLETION (to *reinit* a completion structure). Furthermore, while all other completion functions exepct a pointer as a parameter, INIT_COMPLETION does not. To make it easier to remember which function to use and to make code more readable, introduce a new inline function with the proper name and consistent argument type. Update the kernel-doc for init_completion while we are here. Signed-off-by:
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Alexander Holler authored
Enable the processing of HID input records before the RTC will be registered, in order to allow the RTC register function to read clock. Without doing that the clock can only be read after the probe function has finished. Signed-off-by:
Alexander Holler <holler@ahsoftware.de> Signed-off-by:
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Jingoo Han authored
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by:
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Kees Cook authored
This ignores %n in printf again, as was originally documented. Implementing %n poses a greater security risk than utility, so it should stay ignored. To help anyone attempting to use %n, a warning will be emitted if it is encountered. Based on an earlier patch by Joe Perches. Because %n was designed to write to pointers on the stack, it has been frequently used as an attack vector when bugs are found that leak user-controlled strings into functions that ultimately process format strings. While this class of bug can still be turned into an information leak, removing %n eliminates the common method of elevating such a bug into an arbitrary kernel memory writing primitive, significantly reducing the danger of this class of bug. For seq_file users that need to know the length of a written string for padding, please see seq_setwidth() and seq_pad() instead. Signed-off-by:
Kees Cook <keescook@chromium.org> Cc: Joe Perches <joe@perches.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: David Miller <davem@davemloft.net> Signed-off-by:
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Tetsuo Handa authored
All seq_printf() users are using "%n" for calculating padding size, convert them to use seq_setwidth() / seq_pad() pair. Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by:
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Tetsuo Handa authored
There are several users who want to know bytes written by seq_*() for alignment purpose. Currently they are using %n format for knowing it because seq_*() returns 0 on success. This patch introduces seq_setwidth() and seq_pad() for allowing them to align without using %n format. Signed-off-by:
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Peter Zijlstra authored
Avoid the fragile Kconfig construct guestimating spinlock_t sizes; use a friendly compile-time test to determine this. [kirill.shutemov@linux.intel.com: drop CONFIG_CMPXCHG_LOCKREF] Signed-off-by:
Peter Zijlstra <peterz@infradead.org> Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Kirill A. Shutemov authored
If DEBUG_SPINLOCK and DEBUG_LOCK_ALLOC are enabled spinlock_t on x86_64 is 72 bytes. For page->ptl they will be allocated from kmalloc-96 slab, so we loose 24 on each. An average system can easily allocate few tens thousands of page->ptl and overhead is significant. Let's create a separate slab for page->ptl allocation to solve this. Signed-off-by:
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Peter Zijlstra authored
Use kernel/bounds.c to convert build-time spinlock_t size check into a preprocessor symbol and apply that to properly separate the page::ptl situation. Signed-off-by:
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Kirill A. Shutemov authored
If split page table lock is in use, we embed the lock into struct page of table's page. We have to disable split lock, if spinlock_t is too big be to be embedded, like when DEBUG_SPINLOCK or DEBUG_LOCK_ALLOC enabled. This patch add support for dynamic allocation of split page table lock if we can't embed it to struct page. page->ptl is unsigned long now and we use it as spinlock_t if sizeof(spinlock_t) <= sizeof(long), otherwise it's pointer to spinlock_t. The spinlock_t allocated in pgtable_page_ctor() for PTE table and in pgtable_pmd_page_ctor() for PMD table. All other helpers converted to support dynamically allocated page->ptl. Signed-off-by:
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Kirill A. Shutemov authored
At the moment xtensa uses slab allocator for PTE table. It doesn't work with enabled split page table lock: slab uses page->slab_cache and page->first_page for its pages. These fields share stroage with page->ptl. Signed-off-by:
Max Filippov <jcmvbkbc@gmail.com> Signed-off-by:
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Kirill A. Shutemov authored
Signed-off-by:
Will Deacon <will.deacon@arm.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by:
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
Signed-off-by:
Chris Metcalf <cmetcalf@tilera.com> Signed-off-by:
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Kirill A. Shutemov authored
Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
Signed-off-by:
Lennox Wu <lennox.wu@gmail.com> Signed-off-by:
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
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Kirill A. Shutemov authored
Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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Kirill A. Shutemov authored
Signed-off-by:
Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by:
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