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2013-11-15kfifo API type safetyStefani Seibold10-44/+25
This patch enhances the type safety for the kfifo API. It is now safe to put const data into a non const FIFO and the API will now generate a compiler warning when reading from the fifo where the destination address is pointing to a const variable. As a side effect the kfifo_put() does now expect the value of an element instead a pointer to the element. This was suggested Russell King. It make the handling of the kfifo_put easier since there is no need to create a helper variable for getting the address of a pointer or to pass integers of different sizes. IMHO the API break is okay, since there are currently only six users of kfifo_put(). The code is also cleaner by kicking out the "if (0)" expressions. [[email protected]: coding-style fixes] Signed-off-by: Stefani Seibold <[email protected]> Cc: Russell King <[email protected]> Cc: Hauke Mehrtens <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15kfifo: kfifo_copy_{to,from}_user: fix copied bytes calculationLars-Peter Clausen1-2/+2
'copied' and 'len' are in bytes, while 'ret' is in elements, so we need to multiply 'ret' with the size of one element to get the correct result. Signed-off-by: Lars-Peter Clausen <[email protected]> Cc: Stefani Seibold <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15sound/core/memalloc.c: use gen_pool_dma_alloc() to allocate iram bufferNicolin Chen1-5/+1
Since gen_pool_dma_alloc() is introduced, we implement it to simplify code. Signed-off-by: Nicolin Chen <[email protected]> Acked-by: Takashi Iwai <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15llists-move-llist_reverse_order-from-raid5-to-llistc-fixAndrew Morton1-1/+1
fix comment typo, per Jan Cc: Christoph Hellwig <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15llists: move llist_reverse_order from raid5 to llist.cChristoph Hellwig3-14/+24
Make this useful helper available for other users. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Neil Brown <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15kernel: fix generic_exec_single indentationChristoph Hellwig1-2/+1
Signed-off-by: Christoph Hellwig <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15kernel-provide-a-__smp_call_function_single-stub-for-config_smp-fixAndrew Morton1-9/+3
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 <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15kernel: provide a __smp_call_function_single stub for !CONFIG_SMPChristoph Hellwig1-0/+11
Signed-off-by: Christoph Hellwig <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15kernel: remove CONFIG_USE_GENERIC_SMP_HELPERSChristoph Hellwig25-33/+6
We've switched over every architecture that supports SMP to it, so remove the new useless config variable. Signed-off-by: Christoph Hellwig <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15revert "softirq: Add support for triggering softirq work on softirqs"Christoph Hellwig2-153/+0
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: Christoph Hellwig <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jens Axboe <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15drivers/w1/masters/w1-gpio.c: use dev_get_platdata()Jingoo Han1-5/+5
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 <[email protected]> Acked-by: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15sched: remove INIT_COMPLETIONWolfram Sang1-10/+0
All users are converted over to reinit_completion(). Remove the old macro now. Signed-off-by: Wolfram Sang <[email protected]> Cc: Linus Walleij <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15tree-wide: use reinit_completion instead of INIT_COMPLETIONWolfram Sang86-138/+138
Use this new function to make code more comprehensible, since we are reinitialzing the completion, not initializing. [[email protected]: linux-next resyncs] Signed-off-by: Wolfram Sang <[email protected]> Acked-by: Linus Walleij <[email protected]> (personally at LCE13) Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15sched: replace INIT_COMPLETION with reinit_completionWolfram Sang1-3/+15
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: Wolfram Sang <[email protected]> Acked-by: Linus Walleij <[email protected]> (personally at LCE13) Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15drivers/rtc/rtc-hid-sensor-time.c: enable HID input processing earlyAlexander Holler1-0/+7
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 <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15drivers/rtc/rtc-hid-sensor-time.c: use dev_get_platdata()Jingoo Han1-2/+2
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 <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15vsprintf: ignore %n againKees Cook1-11/+9
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 <[email protected]> Cc: Joe Perches <[email protected]> Cc: Tetsuo Handa <[email protected]> Cc: David Miller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15seq_file: remove "%n" usage from seq_file usersTetsuo Handa10-97/+73
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 <[email protected]> Signed-off-by: Kees Cook <[email protected]> Cc: Joe Perches <[email protected]> Cc: David Miller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15seq_file: introduce seq_setwidth() and seq_pad()Tetsuo Handa2-0/+30
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: Tetsuo Handa <[email protected]> Signed-off-by: Kees Cook <[email protected]> Cc: Joe Perches <[email protected]> Cc: David Miller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15lockref: use BLOATED_SPINLOCKS to avoid explicit config dependenciesPeter Zijlstra3-9/+7
Avoid the fragile Kconfig construct guestimating spinlock_t sizes; use a friendly compile-time test to determine this. [[email protected]: drop CONFIG_CMPXCHG_LOCKREF] Signed-off-by: Peter Zijlstra <[email protected]> Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15mm: create a separate slab for page->ptl allocationKirill A. Shutemov3-1/+17
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: Kirill A. Shutemov <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15mm: properly separate the bloated ptl from the regular casePeter Zijlstra4-21/+25
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: Peter Zijlstra <[email protected]> Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15mm: dynamically allocate page->ptl if it cannot be embedded to struct pageKirill A. Shutemov6-24/+179
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: Kirill A. Shutemov <[email protected]> Reviewed-by: Peter Zijlstra <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15xtensa: use buddy allocator for PTE tableKirill A. Shutemov3-30/+13
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: Kirill A. Shutemov <[email protected]> Cc: Chris Zankel <[email protected]> Acked-by: Max Filippov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15iommu/arm-smmu: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: Will Deacon <[email protected]> Cc: Grant Likely <[email protected]> Cc: Rob Herring <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15xtensa: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Chris Zankel <[email protected]> Cc: Max Filippov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15x86: handle pgtable_page_ctor() failKirill A. Shutemov1-2/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15unicore32: handle pgtable_page_ctor() failKirill A. Shutemov1-6/+8
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Guan Xuetao <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15um: handle pgtable_page_ctor() failKirill A. Shutemov1-2/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15tile: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+5
Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: Chris Metcalf <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15sparc: handle pgtable_page_ctor() failKirill A. Shutemov2-6/+10
Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: David S. Miller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15sh: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Paul Mundt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15score: handle pgtable_page_ctor() failKirill A. Shutemov1-3/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Chen Liqin <[email protected]> Acked-by: Lennox Wu <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15s390: handle pgtable_page_ctor() failKirill A. Shutemov1-2/+9
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15powerpc: handle pgtable_page_ctor() failKirill A. Shutemov3-5/+12
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15parisc: handle pgtable_page_ctor() failKirill A. Shutemov1-2/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Helge Deller <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15mips: handle pgtable_page_ctor() failKirill A. Shutemov1-3/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Ralf Baechle <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15metag: handle pgtable_page_ctor() failKirill A. Shutemov1-2/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: James Hogan <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15m68k: handle pgtable_page_ctor() failKirill A. Shutemov3-3/+14
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15m32r: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Hirokazu Takata <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15ia64: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15hexagon: handle pgtable_page_ctor() failKirill A. Shutemov1-4/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Richard Kuo <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15frv: handle pgtable_page_ctor() failKirill A. Shutemov1-4/+8
Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: David Howells <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15cris: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Mikael Starvik <[email protected]> Acked-by: Jesper Nilsson <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15avr32: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Haavard Skinnemoen <[email protected]> Acked-by: Hans-Christian Egtvedt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15arm64: handle pgtable_page_ctor() failKirill A. Shutemov1-3/+6
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15arm: handle pgtable_page_ctor() failKirill A. Shutemov1-5/+7
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Russell King <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15arc: handle pgtable_page_ctor() failKirill A. Shutemov1-3/+8
Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: Vineet Gupta <[email protected]> [for arch/arc bits] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15alpha: handle pgtable_page_ctor() failKirill A. Shutemov1-1/+4
Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Ivan Kokshaysky <[email protected]> Cc: Matt Turner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-11-15openrisc: add missing pgtable_page_ctor/dtor callsKirill A. Shutemov1-2/+8
It will fix NR_PAGETABLE accounting. It's also required if the arch is going ever support split ptl. Signed-off-by: Kirill A. Shutemov <[email protected]> Cc: Jonas Bonn <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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