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* nilfs2: use nilfs_btree_node_size()Geliang Tang2017-02-281-1/+1
| | | | | | | | | | Use nilfs_btree_node_size() instead of open-coding. Link: http://lkml.kernel.org/r/1485184655-3895-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs: add i_blocksize()Fabian Frederick2017-02-2827-51/+56
| | | | | | | | | | | | | | | | | | | | | Replace all 1 << inode->i_blkbits and (1 << inode->i_blkbits) in fs branch. This patch also fixes multiple checkpatch warnings: WARNING: Prefer 'unsigned int' to bare use of 'unsigned' Thanks to Andrew Morton for suggesting more appropriate function instead of macro. [geliangtang@gmail.com: truncate: use i_blocksize()] Link: http://lkml.kernel.org/r/9c8b2cd83c8f5653805d43debde9fa8817e02fc4.1484895804.git.geliangtang@gmail.com Link: http://lkml.kernel.org/r/1481319905-10126-1-git-send-email-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* scatterlist: do not disable IRQs in sg_copy_bufferGilad Ben-Yossef2017-02-281-4/+0
| | | | | | | | | | | | | | | | | | Commit 50bed2e2862a ("sg: disable interrupts inside sg_copy_buffer") introduced disabling interrupts in sg_copy_buffer() since atomic uses of miter required it due to use of kmap_atomic(). However, as commit 8290e2d2dcbf ("scatterlist: atomic sg_mapping_iter() no longer needs disabled IRQs") acknowledges disabling interrupts is no longer needed for calls to kmap_atomic() and therefore unneeded for miter ops either, so remove it from sg_copy_buffer(). Link: http://lkml.kernel.org/r/1486040150-14109-3-git-send-email-gilad@benyossef.com Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: <ofir.drang@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* scatterlist: reorder compound boolean expressionGilad Ben-Yossef2017-02-281-1/+1
| | | | | | | | | | | Test the cheaper boolean expression with no side effects first. Link: http://lkml.kernel.org/r/1486040150-14109-2-git-send-email-gilad@benyossef.com Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: <ofir.drang@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ipc/shm: Fix shmat mmap nil-page protectionDavidlohr Bueso2017-02-281-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The issue is described here, with a nice testcase: https://bugzilla.kernel.org/show_bug.cgi?id=192931 The problem is that shmat() calls do_mmap_pgoff() with MAP_FIXED, and the address rounded down to 0. For the regular mmap case, the protection mentioned above is that the kernel gets to generate the address -- arch_get_unmapped_area() will always check for MAP_FIXED and return that address. So by the time we do security_mmap_addr(0) things get funky for shmat(). The testcase itself shows that while a regular user crashes, root will not have a problem attaching a nil-page. There are two possible fixes to this. The first, and which this patch does, is to simply allow root to crash as well -- this is also regular mmap behavior, ie when hacking up the testcase and adding mmap(... |MAP_FIXED). While this approach is the safer option, the second alternative is to ignore SHM_RND if the rounded address is 0, thus only having MAP_SHARED flags. This makes the behavior of shmat() identical to the mmap() case. The downside of this is obviously user visible, but does make sense in that it maintains semantics after the round-down wrt 0 address and mmap. Passes shm related ltp tests. Link: http://lkml.kernel.org/r/1486050195-18629-1-git-send-email-dave@stgolabs.net Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Reported-by: Gareth Evans <gareth.evans@contextis.co.uk> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ipc/mqueue: add missing sparse annotationLuc Van Oostenryck2017-02-281-0/+1
| | | | | | | Link: http://lkml.kernel.org/r/20170128235704.45302-1-luc.vanoostenryck@gmail.com Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ipc/sem: add hysteresisManfred Spraul2017-02-282-26/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sysv sem has two lock modes: One with per-semaphore locks, one lock mode with a single global lock for the whole array. When switching from the per-semaphore locks to the global lock, all per-semaphore locks must be scanned for ongoing operations. The patch adds a hysteresis for switching from the global lock to the per semaphore locks. This reduces how often the per-semaphore locks must be scanned. Compared to the initial patch, this is a simplified solution: Setting USE_GLOBAL_LOCK_HYSTERESIS to 1 restores the current behavior. In theory, a workload with exactly 10 simple sops and then one complex op now scales a bit worse, but this is pure theory: If there is concurrency, the it won't be exactly 10:1:10:1:10:1:... If there is no concurrency, then there is no need for scalability. Link: http://lkml.kernel.org/r/1476851896-3590-3-git-send-email-manfred@colorfullife.com Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: <1vier1@web.de> Cc: kernel test robot <xiaolong.ye@intel.com> Cc: <felixh@informatik.uni-bremen.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ipc/sem.c: avoid using spin_unlock_wait()Manfred Spraul2017-02-281-22/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | a) The ACQUIRE in spin_lock() applies to the read, not to the store, at least for powerpc. This forces to add a smp_mb() into the fast path. b) The memory barrier provided by spin_unlock_wait() is right now arch dependent. Therefore: Use spin_lock()/spin_unlock() instead of spin_unlock_wait(). Advantage: faster single op semop calls(), observed +8.9% on x86. (the other solution would be arch dependencies in ipc/sem). Disadvantage: slower complex op semop calls, if (and only if) there are no sleeping operations. The next patch adds hysteresis, this further reduces the probability that the slow path is used. Link: http://lkml.kernel.org/r/1476851896-3590-2-git-send-email-manfred@colorfullife.com Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: <1vier1@web.de> Cc: kernel test robot <xiaolong.ye@intel.com> Cc: <felixh@informatik.uni-bremen.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* initramfs: finish fput() before accessing any binary from initramfsLokesh Vutla2017-02-282-3/+2
| | | | | | | | | | | | | | | | | | | | | | Commit 4a9d4b024a31 ("switch fput to task_work_add") implements a schedule_work() for completing fput(), but did not guarantee calling __fput() after unpacking initramfs. Because of this, there is a possibility that during boot a driver can see ETXTBSY when it tries to load a binary from initramfs as fput() is still pending on that binary. This patch makes sure that fput() is completed after unpacking initramfs and removes the call to flush_delayed_fput() in kernel_init() which happens very late after unpacking initramfs. Link: http://lkml.kernel.org/r/20170201140540.22051-1-lokeshvutla@ti.com Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Reported-by: Murali Karicheri <m-karicheri2@ti.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Tero Kristo <t-kristo@ti.com> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Nishanth Menon <nm@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* lib/fonts/Kconfig: keep non-Sparc fonts listed togetherRandy Dunlap2017-02-281-8/+8
| | | | | | | | | | | | Keep fonts together and indented (in menu) as much as possible. This moves the Sparc font choices to the end of the menu since they have different dependencies. Link: http://lkml.kernel.org/r/de6d8977-c6d6-a82d-c953-f2a2fefdb8a5@infradead.org Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* config: android-base: enable hardened usercopy and kernel ASLRAmit Pundir2017-02-281-0/+2
| | | | | | | | | | | | | | | | Enable CONFIG_HARDENED_USERCOPY and CONFIG_RANDOMIZE_BASE in Android base config fragment. Reviewed at https://android-review.googlesource.com/#/c/283659/ Reviewed at https://android-review.googlesource.com/#/c/278133/ Link: http://lkml.kernel.org/r/1481113148-29204-2-git-send-email-amit.pundir@linaro.org Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Cc: Rob Herring <rob.herring@linaro.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* config: android-recommended: disable aio supportDaniel Micay2017-02-281-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The aio interface adds substantial attack surface for a feature that's not being exposed by Android at all. It's unlikely that anyone is using the kernel feature directly either. This feature is rarely used even on servers. The glibc POSIX aio calls really use thread pools. The lack of widespread usage also means this is relatively poorly audited/tested. The kernel's aio rarely provides performance benefits over using a thread pool and is quite incomplete in terms of system call coverage along with having edge cases where blocking can occur. Part of the performance issue is the fact that it only supports direct io, not buffered io. The existing API is considered fundamentally flawed and it's unlikely it will be expanded, but rather replaced: https://marc.info/?l=linux-aio&m=145255815216051&w=2 Since ext4 encryption means no direct io support, kernel aio isn't even going to work properly on Android devices using file-based encryption. Reviewed-at: https://android-review.googlesource.com/#/c/292158/ Link: http://lkml.kernel.org/r/1481113148-29204-1-git-send-email-amit.pundir@linaro.org Signed-off-by: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Cc: Rob Herring <rob.herring@linaro.org> Cc: John Stultz <john.stultz@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs: make export work with cold dcacheFabian Frederick2017-02-281-0/+19
| | | | | | | | | | | | | | | This adds get_parent function so that nfs client can still work after cache drop (Tested on NFS v4 with echo 3 > /proc/sys/vm/drop_caches) [weiyongjun1@huawei.com: fix return value check in affs_get_parent()] Link: http://lkml.kernel.org/r/20170123141018.2331-1-weiyj.lk@gmail.com Link: http://lkml.kernel.org/r/20170109191208.6085-8-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Suggested-by: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs/namei.c: forward declarations clean-upFabian Frederick2017-02-281-20/+10
| | | | | | | | | | Move dentry_operations structures and remove forward declarations. Link: http://lkml.kernel.org/r/20170109191208.6085-7-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs: add prefix to some functionsFabian Frederick2017-02-285-14/+15
| | | | | | | | | | | | | | secs_to_datestamp(time64_t secs, struct affs_date *ds); prot_to_mode(u32 prot); mode_to_prot(struct inode *inode); were declared without affs_ prefix Link: http://lkml.kernel.org/r/20170109191208.6085-6-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs: use octal for permissionsFabian Frederick2017-02-281-18/+18
| | | | | | | | | | | According to commit f90774e1fd27 ("checkpatch: look for symbolic permissions and suggest octal instead") Link: http://lkml.kernel.org/r/20170109191208.6085-5-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs: make affs exportableFabian Frederick2017-02-283-0/+42
| | | | | | | | | | | | Add standard functions making AFFS work with NFS. Functions based on ext4 implementation. Tested on loop device. Link: http://lkml.kernel.org/r/20170109191208.6085-4-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs: add validation block functionFabian Frederick2017-02-281-4/+10
| | | | | | | | | | Avoid repeating 4 times the same calculation. Link: http://lkml.kernel.org/r/20170109191208.6085-3-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/affs: remove reference to affs_parent_ino()Fabian Frederick2017-02-281-1/+0
| | | | | | | | | | | | | | | | Patch series "make FS exportable plus some clean-up", v7. This small patchset makes AFFS work with NFS for standard operations. THis patch (of 7): affs_parent_ino() was removed a long time ago. Link: http://lkml.kernel.org/r/20170109191208.6085-2-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs,eventpoll: don't test for bitfield with stack valueCyrill Gorcunov2017-02-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | In case if epoll_ctl is called with operation EPOLL_CTL_DEL then @epds.events variable allocated on stack may contain random bits which we test then for EPOLLEXCLUSIVE. Since currently the test look like if (epds.events & EPOLLEXCLUSIVE) { if (op == EPOLL_CTL_MOD) goto error_tgt_fput; if (op == EPOLL_CTL_ADD && (is_file_epoll(tf.file) || (epds.events & ~EPOLLEXCLUSIVE_OK_BITS))) goto error_tgt_fput; } Nothing serious will happen even if epds.events has this bit set, still better to be on safe side and make sure that we're to test this bit at all. Link: http://lkml.kernel.org/r/20170214154935.GG1850@uranus.lan Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrey Vagin <avagin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* include/linux/pid.h: use for_each_thread() in do_each_pid_thread()Tetsuo Handa2017-02-281-2/+2
| | | | | | | | | | | | | | while_each_pid_thread() is using while_each_thread(), which is unsafe under RCU lock according to commit 0c740d0afc3b ("introduce for_each_thread() to replace the buggy while_each_thread()"). Use for_each_thread() in do_each_pid_thread() which is safe under RCU lock. Link: http://lkml.kernel.org/r/201702011947.DBD56740.OMVHOLOtSJFFFQ@I-love.SAKURA.ne.jp Link: http://lkml.kernel.org/r/1486041779-4401-2-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rapidio: use get_user_pages_unlocked()Lorenzo Stoakes2017-02-281-6/+5
| | | | | | | | | | | | | Moving from get_user_pages() to get_user_pages_unlocked() simplifies the code and takes advantage of VM_FAULT_RETRY functionality when faulting in pages. Link: http://lkml.kernel.org/r/20170103205024.6704-1-lstoakes@gmail.com Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com> Acked-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* /proc/kcore: update physical address for kcore ram and textPratyush Anand2017-02-281-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently all the p_paddr of PT_LOAD headers are assigned to 0, which is not true and could be misleading, since 0 is a valid physical address. User space tools like makedumpfile needs to know physical address for PT_LOAD segments of direct mapped regions. Therefore this patch updates paddr for such regions. It also sets an invalid paddr (-1) for other regions, so that user space tool can know whether a physical address provided in PT_LOAD is correct or not. I do not know why it was 0, which is a valid physical address. But certainly, it might break some user space tools, and those need to be fixed. For example, see following code from kexec-tools kexec/kexec-elf.c:build_mem_phdrs() if ((phdr->p_paddr + phdr->p_memsz) < phdr->p_paddr) { /* The memory address wraps */ if (probe_debug) { fprintf(stderr, "ELF address wrap around\n"); } return -1; } We do not need to perform above check for an invalid physical address. I think, kexec-tools and makedumpfile will need fixup. I already have those fixup which will be sent upstream once this patch makes through. Pro with this approach is that, it will help to calculate variable like page_offset, phys_base from PT_LOAD even when they are randomized and therefore will reduce many variable and version specific values in user space tools. Having an ASLR offset information can help to translate an identity mapped virtual address to a physical address. But that would be an additional field in PT_LOAD header structure and an arch dependent value. Moreover, sending a valid physical address like 0 does not seem right. So, IMHO it is better to fix that and send valid physical address when available (identity mapped). Link: http://lkml.kernel.org/r/f951340d2917cdd2a329fae9837a83f2059dc3b2.1485318868.git.panand@redhat.com Signed-off-by: Pratyush Anand <panand@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dave Anderson <anderson@redhat.com> Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp> Cc: Simon Horman <simon.horman@netronome.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tools/testing/selftests/sigaltstack/sas.c: improve output of sigaltstack ↵Stas Sergeev2017-02-281-3/+4
| | | | | | | | | | | | | | | | testcase Currently it uses %i for bitmasks, which makes it difficult to properly decode the values. Use %x instead. Link: http://lkml.kernel.org/r/b7b4c45d-2f21-de6c-d1c8-16c8386da27c@list.ru Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net> Cc: Shuah Khan <shuah@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sigaltstack: support SS_AUTODISARM for CONFIG_COMPATStas Sergeev2017-02-282-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently SS_AUTODISARM is not supported in compatibility mode, but does not return -EINVAL either. This makes dosemu built with -m32 on x86_64 to crash. Also the kernel's sigaltstack selftest fails if compiled with -m32. This patch adds the needed support. Link: http://lkml.kernel.org/r/20170205101213.8163-2-stsp@list.ru Signed-off-by: Stas Sergeev <stsp@users.sourceforge.net> Cc: Milosz Tanski <milosz@adfin.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: Waiman Long <Waiman.Long@hpe.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dmitry Safonov <dsafonov@virtuozzo.com> Cc: Wang Xiaoqiang <wangxq10@lzu.edu.cn> Cc: Oleg Nesterov <oleg@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/reiserfs: atomically read inode sizeFabian Frederick2017-02-281-1/+1
| | | | | | | | | See i_size_read() comments in include/linux/fs.h Link: http://lkml.kernel.org/r/20170123174701.30394-1-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hfsplus: atomically read inode sizeFabian Frederick2017-02-281-1/+1
| | | | | | | | | See i_size_read() comments in include/linux/fs.h Link: http://lkml.kernel.org/r/20170123175338.3840-1-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: take more care to not update last_used on path walkIan Kent2017-02-281-6/+11
| | | | | | | | | | | | | | | | | | | | | | GUI environments seem to be becoming more agressive at scanning filesystems, to the point where autofs cannot expire mounts at all. This is one key reason the update of the autofs dentry info last_used field is done in the expire system when the dentry is seen to be in use. But somewhere along the way instances of the update has crept back into the autofs path walk functions which, with the more aggressive file access patterns, is preventing expiration. Changing the update in the path walk functions allows autofs to at least make progress in spite of frequent immediate re-mounts from file accesses. Link: http://lkml.kernel.org/r/148577167169.9801.1377050092212016834.stgit@pluto.themaw.net Signed-off-by: Ian Kent <raven@themaw.net> Cc: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: remove duplicated AUTOFS_DEV_IOCTL_SIZE definitionTomohiro Kusumi2017-02-282-4/+2
| | | | | | | | | | | This macro is already defined in uapi header. Also use this macro where possible. Link: http://lkml.kernel.org/r/148577166656.9801.10322423666945951186.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: add command enum/macros for root-dir ioctlsTomohiro Kusumi2017-02-283-14/+29
| | | | | | | | | | | | Sync root-dir ioctl with misc-char-dev ioctl's enum/macro format since these two types of ioctls aren't completely independent of each other in terms of command nr. No functional changes. Link: http://lkml.kernel.org/r/148577166143.9801.15511796506678428145.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: update ioctl documentation regarding struct autofs_dev_ioctlTomohiro Kusumi2017-02-282-11/+22
| | | | | | | | | | | This is the same as bf72eda5 except that it's a different file. Sync documentation with changes made by 730c9eec in 2009. Link: http://lkml.kernel.org/r/148577165630.9801.6081791213151121657.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: fix wrong ioctl documentation regarding devidTomohiro Kusumi2017-02-281-3/+2
| | | | | | | | | | | This is the same as d8732841 except that it's a different file. A caller has no devid input, and devid is obtained via superblock. Link: http://lkml.kernel.org/r/148577165119.9801.16967562019122274820.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: fix typo in DocumentationTomohiro Kusumi2017-02-281-3/+3
| | | | | | | | Link: http://lkml.kernel.org/r/148577164606.9801.12571810310561599401.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* autofs: remove wrong commentTomohiro Kusumi2017-02-281-4/+0
| | | | | | | | | | | This format seems to have been taken from device mapper header, but autofs has no such file:function in both kernel and userspace. Link: http://lkml.kernel.org/r/148577164094.9801.4775075118014742496.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: move kprobe declarations to asm-generic/kprobes.hLuis R. Rodriguez2017-02-2840-38/+125
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Often all is needed is these small helpers, instead of compiler.h or a full kprobes.h. This is important for asm helpers, in fact even some asm/kprobes.h make use of these helpers... instead just keep a generic asm file with helpers useful for asm code with the least amount of clutter as possible. Likewise we need now to also address what to do about this file for both when architectures have CONFIG_HAVE_KPROBES, and when they do not. Then for when architectures have CONFIG_HAVE_KPROBES but have disabled CONFIG_KPROBES. Right now most asm/kprobes.h do not have guards against CONFIG_KPROBES, this means most architecture code cannot include asm/kprobes.h safely. Correct this and add guards for architectures missing them. Additionally provide architectures that not have kprobes support with the default asm-generic solution. This lets us force asm/kprobes.h on the header include/linux/kprobes.h always, but most importantly we can now safely include just asm/kprobes.h on architecture code without bringing the full kitchen sink of header files. Two architectures already provided a guard against CONFIG_KPROBES on its kprobes.h: sh, arch. The rest of the architectures needed gaurds added. We avoid including any not-needed headers on asm/kprobes.h unless kprobes have been enabled. In a subsequent atomic change we can try now to remove compiler.h from include/linux/kprobes.h. During this sweep I've also identified a few architectures defining a common macro needed for both kprobes and ftrace, that of the definition of the breakput instruction up. Some refer to this as BREAKPOINT_INSTRUCTION. This must be kept outside of the #ifdef CONFIG_KPROBES guard. [mcgrof@kernel.org: fix arm64 build] Link: http://lkml.kernel.org/r/CAB=NE6X1WMByuARS4mZ1g9+W=LuVBnMDnh_5zyN0CLADaVh=Jw@mail.gmail.com [sfr@canb.auug.org.au: fixup for kprobes declarations moving] Link: http://lkml.kernel.org/r/20170214165933.13ebd4f4@canb.auug.org.au Link: http://lkml.kernel.org/r/20170203233139.32682-1-mcgrof@kernel.org Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* zswap: don't param_set_charp while holding spinlockDan Streetman2017-02-281-7/+13
| | | | | | | | | | | | | | | | | | | | | | Change the zpool/compressor param callback function to release the zswap_pools_lock spinlock before calling param_set_charp, since that function may sleep when it calls kmalloc with GFP_KERNEL. While this problem has existed for a while, I wasn't able to trigger it using a tight loop changing either/both the zpool and compressor params; I think it's very unlikely to be an issue on the stable kernels, especially since most zswap users will change the compressor and/or zpool from sysfs only one time each boot - or zero times, if they add the params to the kernel boot. Fixes: c99b42c3529e ("zswap: use charp for zswap param strings") Link: http://lkml.kernel.org/r/20170126155821.4545-1-ddstreet@ieee.org Signed-off-by: Dan Streetman <dan.streetman@canonical.com> Reported-by: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* zswap: clear compressor or zpool param if invalid at initDan Streetman2017-02-281-12/+37
| | | | | | | | | | | | | | | | If either the compressor and/or zpool param are invalid at boot, and their default value is also invalid, set the param to the empty string to indicate there is no compressor and/or zpool configured. This allows users to check the sysfs interface to see which param needs changing. Link: http://lkml.kernel.org/r/20170124200259.16191-4-ddstreet@ieee.org Signed-off-by: Dan Streetman <dan.streetman@canonical.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* zswap: allow initialization at boot without poolDan Streetman2017-02-281-12/+34
| | | | | | | | | | | | | | | Allow zswap to initialize at boot even if it can't create its pool due to a failure to create a zpool and/or compressor. Allow those to be created later, from the sysfs module param interface. Link: http://lkml.kernel.org/r/20170124200259.16191-3-ddstreet@ieee.org Signed-off-by: Dan Streetman <dan.streetman@canonical.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm,fs,dax: mark dax_iomap_pmd_fault as constArnd Bergmann2017-02-281-1/+2
| | | | | | | | | | | | | | | | | The two alternative implementations of dax_iomap_fault have different prototypes, and one of them is obviously wrong as seen from this build warning: fs/dax.c: In function 'dax_iomap_fault': fs/dax.c:1462:35: error: passing argument 2 of 'dax_iomap_pmd_fault' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] This marks the argument 'const' as in all the related functions. Fixes: a2d581675d48 ("mm,fs,dax: change ->pmd_fault to ->huge_fault") Link: http://lkml.kernel.org/r/20170227203349.3318733-1-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'watchdog-for-linus-v4.11' of ↵Linus Torvalds2017-02-2657-1243/+1536
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull watchdog updates from Guenter Roeck: "Wim asked me to handle the watchdog pull request this time around. Key changes: - New drivers: Cortina Gemini, ZTE's zx2967 family, NIC7018 - Convert to use device managed functions: ebc-c384_wdt, tegra_wdt, da9063_wdt, da9062_wdt, da9055_wdt, da9052_wdt, bcm2835_wdt, mena21_wdt, wm831x_wdt, digicolor_wdt, intel-mid_wdt, meson_wdt, sunxi_wdt, aspeed_wdt, coh901327_wdt, iTCO_wdt - Use watchdog core to install restart handler: tangox, dw_wdt, bcm2835_wdt, asm9260_wdt, bcm47xx_wdt - Convert ts72xx_wdt driver to watchdog core - Let core handle heartbeat in ep93xx_wdt driver - Enable COMPILE_TEST where possible - Various other improvements" * tag 'watchdog-for-linus-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (54 commits) watchdog: s3c2410: Add prefix to local function watchdog: s3c2410: Select MFD_SYSCON on all Exynos platforms watchdog: s3c2410: Use dev_dbg instead of pr_info watchdog: s3c2410: Fix infinite interrupt in soft mode watchdog: s3c2410: Remove confusing CONFIG prefix from local defines watchdog: softdog: make pretimeout support a compile option watchdog: zx2967: add watchdog controller driver for ZTE's zx2967 family dt: bindings: add documentation for zx2967 family watchdog controller watchdog: sama5d4: Implement resume hook watchdog: sama5d4: Cache MR instead of a partial config watchdog: ts72xx_wdt: convert driver to watchdog core watchdog: ep93xx_wdt: cleanup and let the core handle the heartbeat watchdog: RDC321X_WDT always depends on PCI watchdog: add driver for Cortina Gemini watchdog watchdog: add DT bindings for Cortina Gemini watchdog: constify watchdog_ops structures watchdog: Introduce watchdog_stop_on_unregister helper watchdog: ebc-c384_wdt: Utilize devm_ functions in driver probe callback watchdog: tegra_wdt: Convert to use device managed functions watchdog: da9063_wdt: Convert to use device managed functions ...
| * watchdog: s3c2410: Add prefix to local functionKrzysztof Kozlowski2017-02-241-3/+2
| | | | | | | | | | | | | | | | Functions marked static inline might not be inlined so a driver-specific prefix for function name helps when looking through call backtrace. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: s3c2410: Select MFD_SYSCON on all Exynos platformsKrzysztof Kozlowski2017-02-241-1/+1
| | | | | | | | | | | | | | | | Syscon is used not only on Exynos5 SoCs but also on Exynos3250, Exynos4412 and ARMv8 versions (Exynos5433, Exynos7). Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: s3c2410: Use dev_dbg instead of pr_infoKrzysztof Kozlowski2017-02-241-23/+6
| | | | | | | | | | | | | | | | | | | | | | Replace the 'debug' module parameter and pr_info() with proper device dynamic debug calls because this is the preferred and flexible way of enabling debugging printks. Also remove some obvious debug printks. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: s3c2410: Fix infinite interrupt in soft modeKrzysztof Kozlowski2017-02-242-7/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In soft (no-reboot) mode, the driver self-pings watchdog upon expiration of an interrupt. However the interrupt itself was not cleared thus on first hit, the system enters infinite interrupt handling loop. On Odroid U3 (Exynos4412), when booted with s3c2410_wdt.soft_noboot=1 argument the console is flooded: # killall -9 watchdog [ 60.523760] s3c2410-wdt 10060000.watchdog: watchdog timer expired (irq) [ 60.536744] s3c2410-wdt 10060000.watchdog: watchdog timer expired (irq) Fix this by writing something to the WTCLRINT register to clear the interrupt. The register WTCLRINT however appeared in S3C6410 so a new watchdog quirk and flavor are needed. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: s3c2410: Remove confusing CONFIG prefix from local definesKrzysztof Kozlowski2017-02-241-8/+8
| | | | | | | | | | | | | | | | | | The CONFIG prefix from defines in the s3c2410_wdt.c might suggest that these constants come from Kconfig. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: softdog: make pretimeout support a compile optionWolfram Sang2017-02-242-8/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It occurred to me that the panic pretimeout governor will stall the softdog, because it is purely software which simply breaks when the kernel panics. Testing governors with the softdog on the other hand is really useful, so make this feature a compile time option which nees to be enabled explicitly. This also removes the overhead if pretimeout support is not used because it will now be compiled away (saving ~10% on ARM32). Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: zx2967: add watchdog controller driver for ZTE's zx2967 familyBaoyou Xie2017-02-243-0/+302
| | | | | | | | | | | | | | This patch adds watchdog controller driver for ZTE's zx2967 family. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * dt: bindings: add documentation for zx2967 family watchdog controllerBaoyou Xie2017-02-241-0/+32
| | | | | | | | | | | | | | | | | | This patch adds dt-binding documentation for zx2967 family watchdog controller. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: sama5d4: Implement resume hookAlexandre Belloni2017-02-241-0/+17
| | | | | | | | | | | | | | | | When resuming for the deepest state on sama5d2, it is necessary to restore MR as the registers are lost. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| * watchdog: sama5d4: Cache MR instead of a partial configAlexandre Belloni2017-02-241-26/+19
| | | | | | | | | | | | | | | | | | .config is used to cache a part of WDT_MR at probe time and is not used afterwards. Instead of doing that, actually cache MR and avoid reading it every time it is modified. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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