1. 20 May, 2017 1 commit
  2. 19 May, 2017 1 commit
  3. 17 May, 2017 1 commit
  4. 15 May, 2017 2 commits
  5. 11 May, 2017 2 commits
  6. 10 May, 2017 6 commits
    • Wen Xiong's avatar
      blk-mq: NVMe 512B/4K+T10 DIF/DIX format returns I/O error on dd with split op · f36ea50c
      Wen Xiong authored
      When formatting NVMe to 512B/4K + T10 DIf/DIX, dd with split op returns
      "Input/output error". Looks block layer split the bio after calling
      bio_integrity_prep(bio). This patch fixes the issue.
      
      Below is how we debug this issue:
      (1)format nvme to 4K block # size with type 2 DIF
      (2)dd with block size bigger than 1024k.
      oflag=direct
      dd: error writing '/dev/nvme0n1': Input/output error
      
      We added some debug code in nvme device driver. It showed us the first
      op and the second op have the same bi and pi address. This is not
      correct.
      
      1st op: nvme0n1 Op:Wr slba 0x505 length 0x100, PI ctrl=0x1400,
      	dsmgmt=0x0, AT=0x0 & RT=0x505
      	Guard 0x00b1, AT 0x0000, RT physical 0x00000505 RT virtual 0x00002828
      
      2nd op: nvme0n1 Op:Wr slba 0x605 length 0x1, PI ctrl=0x1400, dsmgmt=0x0,
      	AT=0x0 & RT=0x605  ==> This op fails and subsequent 5 retires..
      	Guard 0x00b1, AT 0x0000, RT physical 0x00000605 RT virtual 0x00002828
      
      With the fix, It showed us both of the first op and the second op have
      correct bi and pi address.
      
      1st op: nvme2n1 Op:Wr slba 0x505 length 0x100, PI ctrl=0x1400,
      	dsmgmt=0x0, AT=0x0 & RT=0x505
      	Guard 0x5ccb, AT 0x0000, RT physical 0x00000505 RT virtual
      	0x00002828
      2nd op: nvme2n1 Op:Wr slba 0x605 length 0x1, PI ctrl=0x1400, dsmgmt=0x0,
      	AT=0x0 & RT=0x605
      	Guard 0xab4c, AT 0x0000, RT physical 0x00000605 RT virtual
      	0x00003028
      Signed-off-by: default avatarWen Xiong <wenxiong@linux.vnet.ibm.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      f36ea50c
    • Jens Axboe's avatar
      blk-stat: don't use this_cpu_ptr() in a preemptable section · d3738123
      Jens Axboe authored
      If PREEMPT_RCU is enabled, rcu_read_lock() isn't strong enough
      for us to use this_cpu_ptr() in that section. Use the safer
      get/put_cpu_ptr() variants instead.
      Reported-by: default avatarMike Galbraith <efault@gmx.de>
      Fixes: 34dbad5d ("blk-stat: convert to callback-based statistics reporting")
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      d3738123
    • Jens Axboe's avatar
      elevator: remove redundant warnings on IO scheduler switch · 340ff321
      Jens Axboe authored
      We warn twice for switching to a scheduler, if that switch fails.
      As we also report the failure in the return value to the
      sysfs write, remove the dmesg induced failures.
      
      Keep the failure print for warning to switch to the kconfig
      selected IO scheduler, as we can't report errors for that in
      any other way.
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      340ff321
    • Paolo Valente's avatar
      block, bfq: stress that low_latency must be off to get max throughput · 43c1b3d6
      Paolo Valente authored
      The introduction of the BFQ and Kyber I/O schedulers has triggered a
      new wave of I/O benchmarks. Unfortunately, comments and discussions on
      these benchmarks confirm that there is still little awareness that it
      is very hard to achieve, at the same time, a low latency and a high
      throughput. In particular, virtually all benchmarks measure
      throughput, or throughput-related figures of merit, but, for BFQ, they
      use the scheduler in its default configuration. This configuration is
      geared, instead, toward a low latency. This is evidently a sign that
      BFQ documentation is still too unclear on this important aspect. This
      commit addresses this issue by stressing how BFQ configuration must be
      (easily) changed if the only goal is maximum throughput.
      Signed-off-by: default avatarPaolo Valente <paolo.valente@linaro.org>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      43c1b3d6
    • Paolo Valente's avatar
      block, bfq: use pointer entity->sched_data only if set · a66c38a1
      Paolo Valente authored
      In the function __bfq_deactivate_entity, the pointer
      entity->sched_data could happen to be used before being properly
      initialized. This led to a NULL pointer dereference. This commit fixes
      this bug by just using this pointer only where it is safe to do so.
      Reported-by: default avatarTom Harrison <l12436.tw@gmail.com>
      Tested-by: default avatarTom Harrison <l12436.tw@gmail.com>
      Signed-off-by: default avatarPaolo Valente <paolo.valente@linaro.org>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      a66c38a1
    • Rakesh Pandit's avatar
      nvme: lightnvm: fix memory leak · fba704b4
      Rakesh Pandit authored
      Free up kmalloc allocated memory if failure happens while handling L2P
      table transfer in nvme_nvm_get_l2p_tbl.
      
      Fixes: 8e79b5cb ("lightnvm: move block provisioning to targets")
      Signed-off-by: default avatarRakesh Pandit <rakesh@tuxera.com>
      Reviewed-by: default avatarJavier González <javier@cnexlabs.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      fba704b4
  7. 08 May, 2017 3 commits
    • Colin Ian King's avatar
      blk-mq: make __blk_mq_stop_hw_queues static · ebd76857
      Colin Ian King authored
      Making __blk_mq_stop_hw_queues static fixes sparse warning:
      
        block/blk-mq.c:6: warning: symbol '__blk_mq_stop_hw_queues' was not
        declared. Should it be static?
      
      Fixes: 2719aa21 ("blk-mq: don't use sync workqueue flushing from drivers")
      Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      ebd76857
    • Geert Uytterhoeven's avatar
      lightnvm: remove unused rq parameter of nvme_nvm_rqtocmd() to kill warning · 629b1b2e
      Geert Uytterhoeven authored
      With gcc 4.1.2:
      
          drivers/nvme/host/lightnvm.c: In function ‘nvme_nvm_submit_io’:
          drivers/nvme/host/lightnvm.c:498: warning: ‘rq’ is used uninitialized in this function
      
      Indeed, since commit 2e13f33a ("lightnvm: create cmd before
      allocating request"), the request is passed to nvme_nvm_rqtocmd() before
      it is allocated.
      
      Fortunately, as of commit 91276162 ("lightnvm: refactor end_io
      functions for sync"), nvme_nvm_rqtocmd () no longer uses the passed
      request, so this warning is a false positive.
      
      Drop the unused parameter to clean up the code and kill the warning.
      
      Fixes: 2e13f33a ("lightnvm: create cmd before allocating request")
      Fixes: 91276162 ("lightnvm: refactor end_io functions for sync")
      Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      629b1b2e
    • Wanpeng Li's avatar
      block/mq: fix potential deadlock during cpu hotplug · 51d638b1
      Wanpeng Li authored
      This can be triggered by hot-unplug one cpu.
      
      ======================================================
       [ INFO: possible circular locking dependency detected ]
       4.11.0+ #17 Not tainted
       -------------------------------------------------------
       step_after_susp/2640 is trying to acquire lock:
        (all_q_mutex){+.+...}, at: [<ffffffffb33f95b8>] blk_mq_queue_reinit_work+0x18/0x110
      
       but task is already holding lock:
        (cpu_hotplug.lock){+.+.+.}, at: [<ffffffffb306d04f>] cpu_hotplug_begin+0x7f/0xe0
      
       which lock already depends on the new lock.
      
       the existing dependency chain (in reverse order) is:
      
       -> #1 (cpu_hotplug.lock){+.+.+.}:
              lock_acquire+0x11c/0x230
              __mutex_lock+0x92/0x990
              mutex_lock_nested+0x1b/0x20
              get_online_cpus+0x64/0x80
              blk_mq_init_allocated_queue+0x3a0/0x4e0
              blk_mq_init_queue+0x3a/0x60
              loop_add+0xe5/0x280
              loop_init+0x124/0x177
              do_one_initcall+0x53/0x1c0
              kernel_init_freeable+0x1e3/0x27f
              kernel_init+0xe/0x100
              ret_from_fork+0x31/0x40
      
       -> #0 (all_q_mutex){+.+...}:
              __lock_acquire+0x189a/0x18a0
              lock_acquire+0x11c/0x230
              __mutex_lock+0x92/0x990
              mutex_lock_nested+0x1b/0x20
              blk_mq_queue_reinit_work+0x18/0x110
              blk_mq_queue_reinit_dead+0x1c/0x20
              cpuhp_invoke_callback+0x1f2/0x810
              cpuhp_down_callbacks+0x42/0x80
              _cpu_down+0xb2/0xe0
              freeze_secondary_cpus+0xb6/0x390
              suspend_devices_and_enter+0x3b3/0xa40
              pm_suspend+0x129/0x490
              state_store+0x82/0xf0
              kobj_attr_store+0xf/0x20
              sysfs_kf_write+0x45/0x60
              kernfs_fop_write+0x135/0x1c0
              __vfs_write+0x37/0x160
              vfs_write+0xcd/0x1d0
              SyS_write+0x58/0xc0
              do_syscall_64+0x8f/0x710
              return_from_SYSCALL_64+0x0/0x7a
      
       other info that might help us debug this:
      
        Possible unsafe locking scenario:
      
              CPU0                    CPU1
              ----                    ----
         lock(cpu_hotplug.lock);
                                      lock(all_q_mutex);
                                      lock(cpu_hotplug.lock);
         lock(all_q_mutex);
      
        *** DEADLOCK ***
      
       8 locks held by step_after_susp/2640:
        #0:  (sb_writers#6){.+.+.+}, at: [<ffffffffb3244aed>] vfs_write+0x1ad/0x1d0
        #1:  (&of->mutex){+.+.+.}, at: [<ffffffffb32d3a51>] kernfs_fop_write+0x101/0x1c0
        #2:  (s_active#166){.+.+.+}, at: [<ffffffffb32d3a59>] kernfs_fop_write+0x109/0x1c0
        #3:  (pm_mutex){+.+...}, at: [<ffffffffb30d2ecd>] pm_suspend+0x21d/0x490
        #4:  (acpi_scan_lock){+.+.+.}, at: [<ffffffffb34dc3d7>] acpi_scan_lock_acquire+0x17/0x20
        #5:  (cpu_add_remove_lock){+.+.+.}, at: [<ffffffffb306d6d7>] freeze_secondary_cpus+0x27/0x390
        #6:  (cpu_hotplug.dep_map){++++++}, at: [<ffffffffb306cfd5>] cpu_hotplug_begin+0x5/0xe0
        #7:  (cpu_hotplug.lock){+.+.+.}, at: [<ffffffffb306d04f>] cpu_hotplug_begin+0x7f/0xe0
      
       stack backtrace:
       CPU: 3 PID: 2640 Comm: step_after_susp Not tainted 4.11.0+ #17
       Hardware name: Dell Inc. OptiPlex 7040/0JCTF8, BIOS 1.4.9 09/12/2016
       Call Trace:
        dump_stack+0x99/0xce
        print_circular_bug+0x1fa/0x270
        __lock_acquire+0x189a/0x18a0
        lock_acquire+0x11c/0x230
        ? lock_acquire+0x11c/0x230
        ? blk_mq_queue_reinit_work+0x18/0x110
        ? blk_mq_queue_reinit_work+0x18/0x110
        __mutex_lock+0x92/0x990
        ? blk_mq_queue_reinit_work+0x18/0x110
        ? kmem_cache_free+0x2cb/0x330
        ? anon_transport_class_unregister+0x20/0x20
        ? blk_mq_queue_reinit_work+0x110/0x110
        mutex_lock_nested+0x1b/0x20
        ? mutex_lock_nested+0x1b/0x20
        blk_mq_queue_reinit_work+0x18/0x110
        blk_mq_queue_reinit_dead+0x1c/0x20
        cpuhp_invoke_callback+0x1f2/0x810
        ? __flow_cache_shrink+0x160/0x160
        cpuhp_down_callbacks+0x42/0x80
        _cpu_down+0xb2/0xe0
        freeze_secondary_cpus+0xb6/0x390
        suspend_devices_and_enter+0x3b3/0xa40
        ? rcu_read_lock_sched_held+0x79/0x80
        pm_suspend+0x129/0x490
        state_store+0x82/0xf0
        kobj_attr_store+0xf/0x20
        sysfs_kf_write+0x45/0x60
        kernfs_fop_write+0x135/0x1c0
        __vfs_write+0x37/0x160
        ? rcu_read_lock_sched_held+0x79/0x80
        ? rcu_sync_lockdep_assert+0x2f/0x60
        ? __sb_start_write+0xd9/0x1c0
        ? vfs_write+0x1ad/0x1d0
        vfs_write+0xcd/0x1d0
        SyS_write+0x58/0xc0
        ? rcu_read_lock_sched_held+0x79/0x80
        do_syscall_64+0x8f/0x710
        ? trace_hardirqs_on_thunk+0x1a/0x1c
        entry_SYSCALL64_slow_path+0x25/0x25
      
      The cpu hotplug path will hold cpu_hotplug.lock and then reinit all exiting
      queues for blk mq w/ all_q_mutex, however, blk_mq_init_allocated_queue() will
      contend these two locks in the inversion order. This is due to commit eabe0659
      (blk/mq: Cure cpu hotplug lock inversion), it fixes a cpu hotplug lock inversion
      issue because of hotplug rework, however the hotplug rework is still work-in-progress
      and lives in a -tip branch and mainline cannot yet trigger that splat. The commit
      breaks the linus's tree in the merge window, so this patch reverts the lock order
      and avoids to splat linus's tree.
      
      Cc: Jens Axboe <axboe@kernel.dk>
      Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      51d638b1
  8. 07 May, 2017 1 commit
  9. 06 May, 2017 13 commits
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6 · fe7a719b
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "Various fixes for stable for CIFS/SMB3 especially for better
        interoperability for SMB3 to Macs.
      
        It also includes Pavel's improvements to SMB3 async i/o support
        (which is much faster now)"
      
      * 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
        CIFS: add misssing SFM mapping for doublequote
        SMB3: Work around mount failure when using SMB3 dialect to Macs
        cifs: fix CIFS_IOC_GET_MNT_INFO oops
        CIFS: fix mapping of SFM_SPACE and SFM_PERIOD
        CIFS: fix oplock break deadlocks
        cifs: fix CIFS_ENUMERATE_SNAPSHOTS oops
        cifs: fix leak in FSCTL_ENUM_SNAPS response handling
        Set unicode flag on cifs echo request to avoid Mac error
        CIFS: Add asynchronous write support through kernel AIO
        CIFS: Add asynchronous read support through kernel AIO
        CIFS: Add asynchronous context to support kernel AIO
        cifs: fix IPv6 link local, with scope id, address parsing
        cifs: small underflow in cnvrtDosUnixTm()
      fe7a719b
    • Linus Torvalds's avatar
      Merge tag 'xfs-4.12-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · d484467c
      Linus Torvalds authored
      Pull xfs updates from Darrick Wong:
       "Here are the XFS changes for 4.12. The big new feature for this
        release is the new space mapping ioctl that we've been discussing
        since LSF2016, but other than that most of the patches are larger bug
        fixes, memory corruption prevention, and other cleanups.
      
        Summary:
         - various code cleanups
         - introduce GETFSMAP ioctl
         - various refactoring
         - avoid dio reads past eof
         - fix memory corruption and other errors with fragmented directory blocks
         - fix accidental userspace memory corruptions
         - publish fs uuid in superblock
         - make fstrim terminatable
         - fix race between quotaoff and in-core inode creation
         - avoid use-after-free when finishing up w/ buffer heads
         - reserve enough space to handle bmap tree resizing during cow remap"
      
      * tag 'xfs-4.12-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (53 commits)
        xfs: fix use-after-free in xfs_finish_page_writeback
        xfs: reserve enough blocks to handle btree splits when remapping
        xfs: wait on new inodes during quotaoff dquot release
        xfs: update ag iterator to support wait on new inodes
        xfs: support ability to wait on new inodes
        xfs: publish UUID in struct super_block
        xfs: Allow user to kill fstrim process
        xfs: better log intent item refcount checking
        xfs: fix up quotacheck buffer list error handling
        xfs: remove xfs_trans_ail_delete_bulk
        xfs: don't use bool values in trace buffers
        xfs: fix getfsmap userspace memory corruption while setting OF_LAST
        xfs: fix __user annotations for xfs_ioc_getfsmap
        xfs: corruption needs to respect endianess too!
        xfs: use NULL instead of 0 to initialize a pointer in xfs_ioc_getfsmap
        xfs: use NULL instead of 0 to initialize a pointer in xfs_getfsmap
        xfs: simplify validation of the unwritten extent bit
        xfs: remove unused values from xfs_exntst_t
        xfs: remove the unused XFS_MAXLINK_1 define
        xfs: more do_div cleanups
        ...
      d484467c
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 044f1daa
      Linus Torvalds authored
      Pull block fixes and updates from Jens Axboe:
       "Some fixes and followup features/changes that should go in, in this
        merge window. This contains:
      
         - Two fixes for lightnvm from Javier, fixing problems in the new code
           merge previously in this merge window.
      
         - A fix from Jan for the backing device changes, fixing an issue in
           NFS that causes a failure to mount on certain setups.
      
         - A change from Christoph, cleaning up the blk-mq init and exit
           request paths.
      
         - Remove elevator_change(), which is now unused. From Bart.
      
         - A fix for queue operation invocation on a dead queue, from Bart.
      
         - A series fixing up mtip32xx for blk-mq scheduling, removing a
           bandaid we previously had in place for this. From me.
      
         - A regression fix for this series, fixing a case where we wait on
           workqueue flushing from an invalid (non-blocking) context. From me.
      
         - A fix/optimization from Ming, ensuring that we don't both quiesce
           and freeze a queue at the same time.
      
         - A fix from Peter on lock ordering for CPU hotplug. Not a real
           problem right now, but will be once the CPU hotplug rework goes in.
      
         - A series from Omar, cleaning up out blk-mq debugfs support, and
           adding support for exporting info from schedulers in debugfs as
           well. This is really useful in debugging stalls or livelocks. From
           Omar"
      
      * 'for-linus' of git://git.kernel.dk/linux-block: (28 commits)
        mq-deadline: add debugfs attributes
        kyber: add debugfs attributes
        blk-mq-debugfs: allow schedulers to register debugfs attributes
        blk-mq: untangle debugfs and sysfs
        blk-mq: move debugfs declarations to a separate header file
        blk-mq: Do not invoke queue operations on a dead queue
        blk-mq-debugfs: get rid of a bunch of boilerplate
        blk-mq-debugfs: rename hw queue directories from <n> to hctx<n>
        blk-mq-debugfs: don't open code strstrip()
        blk-mq-debugfs: error on long write to queue "state" file
        blk-mq-debugfs: clean up flag definitions
        blk-mq-debugfs: separate flags with |
        nfs: Fix bdi handling for cloned superblocks
        block/mq: Cure cpu hotplug lock inversion
        lightnvm: fix bad back free on error path
        lightnvm: create cmd before allocating request
        blk-mq: don't use sync workqueue flushing from drivers
        mtip32xx: convert internal commands to regular block infrastructure
        mtip32xx: cleanup internal tag assumptions
        block: don't call blk_mq_quiesce_queue() after queue is frozen
        ...
      044f1daa
    • Greg Kroah-Hartman's avatar
      refcount: change EXPORT_SYMBOL markings · d557d1b5
      Greg Kroah-Hartman authored
      Now that kref is using the refcount apis, the _GPL markings are getting
      exported to places that it previously wasn't.  Now kref.h is GPLv2
      licensed, so any non-GPL code using it better be talking to some
      lawyers, but changing api markings isn't considered "nice", so let's fix
      this up.
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d557d1b5
    • Masahiro Yamada's avatar
      docs: bump minimal GNU Make version to 3.81 · 37d69ee3
      Masahiro Yamada authored
      Since 2014, you can't successfully build kernels with GNU Make version
      3.80. Example errors:
      
        $ git describe
        v4.11
        $ make --version | head -1
        GNU Make 3.80
        $ make defconfig
          HOSTCC  scripts/basic/fixdep
        scripts/Makefile.host:135: *** missing separator.  Stop.
        make: *** [defconfig] Error 2
        $ make ARCH=arm64 help
        arch/arm64/Makefile:43: *** unterminated call to function `warning': missing `)'.  Stop.
        $ make help >/dev/null
        ./Documentation/Makefile.sphinx:25: Extraneous text after `else' directive
        ./Documentation/Makefile.sphinx:31: *** only one `else' per conditional.  Stop.
        make: *** [help] Error 2
      
      The first breakage was introduced by commit c8589d1e ("kbuild:
      handle multi-objs dependency appropriately").  Since then (i.e. v3.18),
      GNU Make 3.80 has not been able to compile the kernel, but nobody has
      ever complained aboutt (or noticed) it.
      
      Even GNU Make 3.81 is more than 10 years old.  It would not hurt to
      match the documentation with reality instead of fixing makefiles.
      Signed-off-by: Masahiro Yamada's avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      37d69ee3
    • Linus Torvalds's avatar
      initramfs: avoid "label at end of compound statement" error · 394e4f5d
      Linus Torvalds authored
      Commit 17a9be31 ("initramfs: Always do fput() and load modules after
      rootfs populate") introduced an error for the
      
          CONFIG_BLK_DEV_RAM=y
      
      case, because even though the code looks fine, the compiler really wants
      a statement after a label, or you'll get complaints:
      
        init/initramfs.c: In function 'populate_rootfs':
        init/initramfs.c:644:2: error: label at end of compound statement
      
      That commit moved the subsequent statements to outside the compound
      statement, leaving the label without any associated statements.
      Reported-by: default avatarJörg Otte <jrg.otte@gmail.com>
      Fixes: 17a9be31 ("initramfs: Always do fput() and load modules after rootfs populate")
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Stafford Horne <shorne@gmail.com>
      Cc: stable@vger.kernel.org  # if 17a9be31 gets backported
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      394e4f5d
    • Linus Torvalds's avatar
      Merge tag 'devicetree-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux · 3ef2bc09
      Linus Torvalds authored
      Pull DeviceTree updates from Rob Herring:
      
       - fix sparse warnings in drivers/of/
      
       - add more overlay unittests
      
       - update dtc to v1.4.4-8-g756ffc4f52f6. This adds more checks on dts
         files such as unit-address formatting and stricter character sets for
         node and property names
      
       - add a common DT modalias function
      
       - move trivial-devices.txt up and out of i2c dir
      
       - ARM NVIC interrupt controller binding
      
       - vendor prefixes for Sensirion, Dioo, Nordic, ROHM
      
       - correct some binding file locations
      
      * tag 'devicetree-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (24 commits)
        of: fix sparse warnings in fdt, irq, reserved mem, and resolver code
        of: fix sparse warning in of_pci_range_parser_one
        of: fix sparse warnings in of_find_next_cache_node
        of/unittest: Missing unlocks on error
        of: fix uninitialized variable warning for overlay test
        of: fix unittest build without CONFIG_OF_OVERLAY
        of: Add unit tests for applying overlays
        of: per-file dtc compiler flags
        fpga: region: add missing DT documentation for config complete timeout
        of: Add vendor prefix for ROHM Semiconductor
        of: fix "/cpus" reference leak in of_numa_parse_cpu_nodes()
        of: Add vendor prefix for Nordic Semiconductor
        dt-bindings: arm,nvic: Binding for ARM NVIC interrupt controller on Cortex-M
        dtc: update warning settings for new bus and node/property name checks
        scripts/dtc: Update to upstream version v1.4.4-8-g756ffc4f52f6
        scripts/dtc: automate getting dtc version and log in update script
        of: Add function for generating a DT modalias with a newline
        of: fix of_device_get_modalias returned length when truncating buffers
        Documentation: devicetree: move trivial-devices out of I2C realm
        dt-bindings: add vendor prefix for Dioo
        ..
      3ef2bc09
    • Linus Torvalds's avatar
      Merge tag 'for-4.12/dm-fixes' of... · 2eecf3a4
      Linus Torvalds authored
      Merge tag 'for-4.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
      
      Pull device mapper fixes from Mike Snitzer:
      
       - DM cache metadata fixes to short-circuit operations that require the
         metadata not be in 'fail_io' mode. Otherwise crashes are possible.
      
       - a DM cache fix to address the inability to adapt to continuous IO
         that happened to also reflect a changing working set (which required
         old blocks be demoted before the new working set could be promoted)
      
       - a DM cache smq policy cleanup that fell out from reviewing the above
      
       - fix the Kconfig help text for CONFIG_DM_INTEGRITY
      
      * tag 'for-4.12/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
        dm cache metadata: fail operations if fail_io mode has been established
        dm integrity: improve the Kconfig help text for DM_INTEGRITY
        dm cache policy smq: cleanup free_target_met() and clean_target_met()
        dm cache policy smq: allow demotions to happen even during continuous IO
      2eecf3a4
    • Linus Torvalds's avatar
      Merge tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 53ef7d0e
      Linus Torvalds authored
      Pull libnvdimm updates from Dan Williams:
       "The bulk of this has been in multiple -next releases. There were a few
        late breaking fixes and small features that got added in the last
        couple days, but the whole set has received a build success
        notification from the kbuild robot.
      
        Change summary:
      
         - Region media error reporting: A libnvdimm region device is the
           parent to one or more namespaces. To date, media errors have been
           reported via the "badblocks" attribute attached to pmem block
           devices for namespaces in "raw" or "memory" mode. Given that
           namespaces can be in "device-dax" or "btt-sector" mode this new
           interface reports media errors generically, i.e. independent of
           namespace modes or state.
      
           This subsequently allows userspace tooling to craft "ACPI 6.1
           Section 9.20.7.6 Function Index 4 - Clear Uncorrectable Error"
           requests and submit them via the ioctl path for NVDIMM root bus
           devices.
      
         - Introduce 'struct dax_device' and 'struct dax_operations': Prompted
           by a request from Linus and feedback from Christoph this allows for
           dax capable drivers to publish their own custom dax operations.
           This fixes the broken assumption that all dax operations are
           related to a persistent memory device, and makes it easier for
           other architectures and platforms to add customized persistent
           memory support.
      
         - 'libnvdimm' core updates: A new "deep_flush" sysfs attribute is
           available for storage appliance applications to manually trigger
           memory controllers to drain write-pending buffers that would
           otherwise be flushed automatically by the platform ADR
           (asynchronous-DRAM-refresh) mechanism at a power loss event.
           Support for "locked" DIMMs is included to prevent namespaces from
           surfacing when the namespace label data area is locked. Finally,
           fixes for various reported deadlocks and crashes, also tagged for
           -stable.
      
         - ACPI / nfit driver updates: General updates of the nfit driver to
           add DSM command overrides, ACPI 6.1 health state flags support, DSM
           payload debug available by default, and various fixes.
      
        Acknowledgements that came after the branch was pushed:
      
         - commmit 565851c9 "device-dax: fix sysfs attribute deadlock":
      Tested-by: default avatarYi Zhang <yizhan@redhat.com>
      
         - commit 23f49844 "libnvdimm: rework region badblocks clearing"
           Tested-by: Toshi Kani <toshi.kani@hpe.com>"
      
      * tag 'libnvdimm-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (52 commits)
        libnvdimm, pfn: fix 'npfns' vs section alignment
        libnvdimm: handle locked label storage areas
        libnvdimm: convert NDD_ flags to use bitops, introduce NDD_LOCKED
        brd: fix uninitialized use of brd->dax_dev
        block, dax: use correct format string in bdev_dax_supported
        device-dax: fix sysfs attribute deadlock
        libnvdimm: restore "libnvdimm: band aid btt vs clear poison locking"
        libnvdimm: fix nvdimm_bus_lock() vs device_lock() ordering
        libnvdimm: rework region badblocks clearing
        acpi, nfit: kill ACPI_NFIT_DEBUG
        libnvdimm: fix clear length of nvdimm_forget_poison()
        libnvdimm, pmem: fix a NULL pointer BUG in nd_pmem_notify
        libnvdimm, region: sysfs trigger for nvdimm_flush()
        libnvdimm: fix phys_addr for nvdimm_clear_poison
        x86, dax, pmem: remove indirection around memcpy_from_pmem()
        block: remove block_device_operations ->direct_access()
        block, dax: convert bdev_dax_supported() to dax_direct_access()
        filesystem-dax: convert to dax_direct_access()
        Revert "block: use DAX for partition table reads"
        ext2, ext4, xfs: retrieve dax_device for iomap operations
        ...
      53ef7d0e
    • Linus Torvalds's avatar
      Merge tag 'staging-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · c6a677c6
      Linus Torvalds authored
      Pull staging/IIO updates from Greg KH:
       "Here is the big staging tree update for 4.12-rc1.
      
        It's a big one, adding about 350k new lines of crap^Wcode, mostly all
        in a big dump of media drivers from Intel. But there's other new
        drivers in here as well, yet-another-wifi driver, new IIO drivers, and
        a new crypto accelerator.
      
        We also deleted a bunch of stuff, mostly in patch cleanups, but also
        the Android ION code has shrunk a lot, and the Android low memory
        killer driver was finally deleted, much to the celebration of the -mm
        developers.
      
        All of these have been in linux-next with a few build issues that will
        show up when you merge to your tree"
      
      Merge conflicts in the new rtl8723bs driver (due to the wifi changes
      this merge window) handled as per linux-next, courtesy of Stephen
      Rothwell.
      
      * tag 'staging-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1182 commits)
        staging: fsl-mc/dpio: add cpu <--> LE conversion for dpaa2_fd
        staging: ks7010: remove line continuations in quoted strings
        staging: vt6656: use tabs instead of spaces
        staging: android: ion: Fix unnecessary initialization of static variable
        staging: media: atomisp: fix range checking on clk_num
        staging: media: atomisp: fix misspelled word in comment
        staging: media: atomisp: kmap() can't fail
        staging: atomisp: remove #ifdef for runtime PM functions
        staging: atomisp: satm include directory is gone
        atomisp: remove some more unused files
        atomisp: remove hmm_load/store/clear indirections
        atomisp: kill off mmgr_free
        atomisp: clean up the hmm init/cleanup indirections
        atomisp: handle allocation calls before init in the hmm layer
        staging: fsl-dpaa2/eth: Add maintainer for Ethernet driver
        staging: fsl-dpaa2/eth: Add TODO file
        staging: fsl-dpaa2/eth: Add trace points
        staging: fsl-dpaa2/eth: Add driver specific stats
        staging: fsl-dpaa2/eth: Add ethtool support
        staging: fsl-dpaa2/eth: Add Freescale DPAA2 Ethernet driver
        ...
      c6a677c6
    • Linus Torvalds's avatar
      Merge tag 'media/v4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · e87d51ac
      Linus Torvalds authored
      Pull media updates from Mauro Carvalho Chehab:
       "Media updates for v4.12-rc1:
      
         - new driver to support mediatek jpeg in hardware codec
      
         - rc-lirc, s5p-cec and st-cec staging drivers got promoted
      
         - hardware histogram support for vsp1 driver
      
         - added Virtual Media Controller driver, to make easier to test the
           media controller
      
         - added a new CEC driver (rainshadow-cec)
      
         - removed two staging LIRC drivers for obscure hardware that are too
           obsolete
      
         - added support for Intel SR300 Depth camera
      
         - some improvements at CEC and RC core
      
         - lots of driver cleanups, improvements all over the tree
      
        With this series, we're finally getting rid of the LIRC staging
        driver. There's just one left (lirc_zilog), with require more care,
        as part of its functionality (IR RX) is already provided by another
        driver. Work in progress to convert it on the proper way"
      
      * tag 'media/v4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (304 commits)
        [media] ov2640: print error if devm_*_optional*() fails
        [media] atmel-isc: Fix the static checker warning
        [media] ov2640: add support for MEDIA_BUS_FMT_YVYU8_2X8 and MEDIA_BUS_FMT_VYUY8_2X8
        [media] ov2640: fix vflip control
        [media] ov2640: fix duplicate width+height returning from ov2640_select_win()
        [media] ov2640: add missing write to size change preamble
        [media] ov2640: add information about DSP register 0xc7
        [media] ov2640: improve banding filter register definitions/documentation
        [media] ov2640: fix init sequence alignment
        [media] ov2640: make GPIOLIB an optional dependency
        [media] xc5000: fix spelling mistake: "calibration"
        [media] vidioc-queryctrl.rst: fix menu/int menu references
        [media] media-entity: only call dev_dbg_obj if mdev is not NULL
        [media] pixfmt-meta-vsp1-hgo.rst: remove spurious '-'
        [media] mtk-vcodec: avoid warnings because of empty macros
        [media] coda: bump maximum number of internal framebuffers to 17
        [media] media: mtk-vcodec: remove informative log
        [media] subdev-formats.rst: remove spurious '-'
        [media] dw2102: limit messages to buffer size
        [media] ttusb2: limit messages to buffer size
        ...
      e87d51ac
    • Linus Torvalds's avatar
      Merge tag 'drm-coc-for-v4.12-rc1' of git://people.freedesktop.org/~airlied/linux · bdc713bf
      Linus Torvalds authored
      Pull drm CoC pointer from Dave Airlie:
       "Small supplementary pull request. I didn't want anyone saying we snuck
        this in in a the middle of a big pile of changes, so here is a clearly
        separate pull request documenting the code of conduct introduced for
        freedesktop.org and how it relates to dri-devel community"
      
      * tag 'drm-coc-for-v4.12-rc1' of git://people.freedesktop.org/~airlied/linux:
        drm: Document code of conduct
      bdc713bf
    • Linus Torvalds's avatar
      Merge tag 'drm-forgot-about-tegra-for-v4.12-rc1' of git://people.freedesktop.org/~airlied/linux · 1062ae49
      Linus Torvalds authored
      Pull drm tegra updates from Dave Airlie:
       "I missed a pull request from Thierry, this stuff has been in
        linux-next for a while anyways.
      
        It does contain a branch from the iommu tree, but Thierry said it
        should be fine"
      
      * tag 'drm-forgot-about-tegra-for-v4.12-rc1' of git://people.freedesktop.org/~airlied/linux:
        gpu: host1x: Fix host1x driver shutdown
        gpu: host1x: Support module reset
        gpu: host1x: Sort includes alphabetically
        drm/tegra: Add VIC support
        dt-bindings: Add bindings for the Tegra VIC
        drm/tegra: Add falcon helper library
        drm/tegra: Add Tegra DRM allocation API
        drm/tegra: Add tiling FB modifiers
        drm/tegra: Don't leak kernel pointer to userspace
        drm/tegra: Protect IOMMU operations by mutex
        drm/tegra: Enable IOVA API when IOMMU support is enabled
        gpu: host1x: Add IOMMU support
        gpu: host1x: Fix potential out-of-bounds access
        iommu/iova: Fix compile error with CONFIG_IOMMU_IOVA=m
        iommu: Add dummy implementations for !IOMMU_IOVA
        MAINTAINERS: Add related headers to IOMMU section
        iommu/iova: Consolidate code for adding new node to iovad domain rbtree
      1062ae49
  10. 05 May, 2017 10 commits
    • Linus Torvalds's avatar
      Merge tag 'gfs2-4.12.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 · 1a5fb64f
      Linus Torvalds authored
      Pull GFS2 updates from Bob Peterson:
       "We've got ten GFS2 patches for this merge window.
      
         - Andreas Gruenbacher wrote a patch to replace the deprecated call to
           rhashtable_walk_init with rhashtable_walk_enter.
      
         - Andreas also wrote a patch to eliminate redundant code in two of
           our debugfs sequence files.
      
         - Andreas also cleaned up the rhashtable key ugliness Linus pointed
           out during this cycle, following Linus's suggestions.
      
         - Andreas also wrote a patch to take advantage of his new function
           rhashtable_lookup_get_insert_fast. This makes glock lookup faster
           and more bullet-proof.
      
         - Andreas also wrote a patch to revert a patch in the evict path that
           caused occasional deadlocks, and is no longer needed.
      
         - Andrew Price wrote a patch to re-enable fallocate for the rindex
           system file to enable gfs2_grow to grow properly on secondary file
           system grow operations.
      
         - I wrote a patch to initialize an inode number field to make certain
           kernel trace points more understandable.
      
         - I also wrote a patch that makes GFS2 file system "withdraw" work
           more like it should by ignoring operations after a withdraw that
           would formerly cause a BUG() and kernel panic.
      
         - I also reworked the entire truncate/delete algorithm, scrapping the
           old recursive algorithm in favor of a new non-recursive algorithm.
           This was done for performance: This way, GFS2 no longer needs to
           lock multiple resource groups while doing truncates and deletes of
           files that cross multiple resource group boundaries, allowing for
           better parallelism. It also solves a problem whereby deleting large
           files would request a large chunk of kernel memory, which resulted
           in a get_page_from_freelist warning.
      
         - Due to a regression found during testing, I added a new patch to
           correct 'GFS2: Prevent BUG from occurring when normal Withdraws
           occur'."
      
      * tag 'gfs2-4.12.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
        GFS2: Allow glocks to be unlocked after withdraw
        GFS2: Non-recursive delete
        gfs2: Re-enable fallocate for the rindex
        Revert "GFS2: Wait for iopen glock dequeues"
        gfs2: Switch to rhashtable_lookup_get_insert_fast
        GFS2: Temporarily zero i_no_addr when creating a dinode
        gfs2: Don't pack struct lm_lockname
        gfs2: Deduplicate gfs2_{glocks,glstats}_open
        gfs2: Replace rhashtable_walk_init with rhashtable_walk_enter
        GFS2: Prevent BUG from occurring when normal Withdraws occur
      1a5fb64f
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.12-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux · aeced661
      Linus Torvalds authored
      Pull orangefs updates from Mike Marshall:
       "Orangefs cleanups, fixes and statx support.
      
        Some cleanups:
      
         - remove unused get_fsid_from_ino
         - fix bounds check for listxattr
         - clean up oversize xattr validation
         - do not set getattr_time on orangefs_lookup
         - return from orangefs_devreq_read quickly if possible
         - do not wait for timeout if umounting
         - handle zero size write in debugfs
      
        Bug fixes:
      
         - do not check possibly stale size on truncate
         - ensure the userspace component is unmounted if mount fails
         - total reimplementation of dir.c
      
        New feature:
      
         - implement statx
      
        The new implementation of dir.c is kind of a big deal, all new code.
        It has been posted to fs-devel during the previous rc period, we
        didn't get much review or feedback from there, but it has been
        reviewed very heavily here, so much so that we have two entire
        versions of the reimplementation.
      
        Not only does the new implementation fix some xfstests, but it passes
        all the new tests we made here that involve seeking and rewinding and
        giant directories and long file names. The new dir code has three
        patches itself:
      
         - skip forward to the next directory entry if seek is short
         - invalidate stored directory on seek
         - count directory pieces correctly"
      
      * tag 'for-linus-4.12-ofs-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
        orangefs: count directory pieces correctly
        orangefs: invalidate stored directory on seek
        orangefs: skip forward to the next directory entry if seek is short
        orangefs: handle zero size write in debugfs
        orangefs: do not wait for timeout if umounting
        orangefs: return from orangefs_devreq_read quickly if possible
        orangefs: ensure the userspace component is unmounted if mount fails
        orangefs: do not check possibly stale size on truncate
        orangefs: implement statx
        orangefs: remove ORANGEFS_READDIR macros
        orangefs: support very large directories
        orangefs: support llseek on directories
        orangefs: rewrite readdir to fix several bugs
        orangefs: do not set getattr_time on orangefs_lookup
        orangefs: clean up oversize xattr validation
        orangefs: fix bounds check for listxattr
        orangefs: remove unused get_fsid_from_ino
      aeced661
    • Linus Torvalds's avatar
      Merge tag 'befs-v4.12-rc1' of git://github.com/luisbg/linux-befs · 414975eb
      Linus Torvalds authored
      Pull befs fix from Luis de Bethencourt:
       "One fix from Fabian Frederick making the nfs client still work after a
        cache drop"
      
      * tag 'befs-v4.12-rc1' of git://github.com/luisbg/linux-befs:
        befs: make export work with cold dcache
      414975eb
    • Linus Torvalds's avatar
      Merge tag 'initramfs-fix-4.12-rc1' of git://github.com/stffrdhrn/linux · 58017a3e
      Linus Torvalds authored
      Pull initramfs fix from Stafford Horne:
       "This is a fix for an issue that has caused 4.11 to not boot on
        OpenRISC. I should have caught this during the 4.11 cycle but I had
        been busy on testing some other series of patches.
      
        I would have considered pushing it though a different path but Al Viro
        suggested submitting directly to you.
      
        Also, its just one as I havent really got anything else ready on my
        queue for 4.12.
      
        Summary:
      
         - Ensure fput() flush is done even for builtin initramfs"
      
      * tag 'initramfs-fix-4.12-rc1' of git://github.com/stffrdhrn/linux:
        initramfs: Always do fput() and load modules after rootfs populate
      58017a3e
    • Bob Peterson's avatar
      GFS2: Allow glocks to be unlocked after withdraw · ed17545d
      Bob Peterson authored
      This bug fixes a regression introduced by patch 0d1c7ae9.
      
      The intent of the patch was to stop promoting glocks after a
      file system is withdrawn due to a variety of errors, because doing
      so results in a BUG(). (You should be able to unmount after a
      withdraw rather than having the kernel panic.)
      
      Unfortunately, it also stopped demotions, so glocks could not be
      unlocked after withdraw, which means the unmount would hang.
      
      This patch allows function do_xmote to demote locks to an
      unlocked state after a withdraw, but not promote them.
      Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
      ed17545d
    • Eryu Guan's avatar
      xfs: fix use-after-free in xfs_finish_page_writeback · 161f55ef
      Eryu Guan authored
      Commit 28b783e4 ("xfs: bufferhead chains are invalid after
      end_page_writeback") fixed one use-after-free issue by
      pre-calculating the loop conditionals before calling bh->b_end_io()
      in the end_io processing loop, but it assigned 'next' pointer before
      checking end offset boundary & breaking the loop, at which point the
      bh might be freed already, and caused use-after-free.
      
      This is caught by KASAN when running fstests generic/127 on sub-page
      block size XFS.
      
      [ 2517.244502] run fstests generic/127 at 2017-04-27 07:30:50
      [ 2747.868840] ==================================================================
      [ 2747.876949] BUG: KASAN: use-after-free in xfs_destroy_ioend+0x3d3/0x4e0 [xfs] at addr ffff8801395ae698
      ...
      [ 2747.918245] Call Trace:
      [ 2747.920975]  dump_stack+0x63/0x84
      [ 2747.924673]  kasan_object_err+0x21/0x70
      [ 2747.928950]  kasan_report+0x271/0x530
      [ 2747.933064]  ? xfs_destroy_ioend+0x3d3/0x4e0 [xfs]
      [ 2747.938409]  ? end_page_writeback+0xce/0x110
      [ 2747.943171]  __asan_report_load8_noabort+0x19/0x20
      [ 2747.948545]  xfs_destroy_ioend+0x3d3/0x4e0 [xfs]
      [ 2747.953724]  xfs_end_io+0x1af/0x2b0 [xfs]
      [ 2747.958197]  process_one_work+0x5ff/0x1000
      [ 2747.962766]  worker_thread+0xe4/0x10e0
      [ 2747.966946]  kthread+0x2d3/0x3d0
      [ 2747.970546]  ? process_one_work+0x1000/0x1000
      [ 2747.975405]  ? kthread_create_on_node+0xc0/0xc0
      [ 2747.980457]  ? syscall_return_slowpath+0xe6/0x140
      [ 2747.985706]  ? do_page_fault+0x30/0x80
      [ 2747.989887]  ret_from_fork+0x2c/0x40
      [ 2747.993874] Object at ffff8801395ae690, in cache buffer_head size: 104
      [ 2748.001155] Allocated:
      [ 2748.003782] PID = 8327
      [ 2748.006411]  save_stack_trace+0x1b/0x20
      [ 2748.010688]  save_stack+0x46/0xd0
      [ 2748.014383]  kasan_kmalloc+0xad/0xe0
      [ 2748.018370]  kasan_slab_alloc+0x12/0x20
      [ 2748.022648]  kmem_cache_alloc+0xb8/0x1b0
      [ 2748.027024]  alloc_buffer_head+0x22/0xc0
      [ 2748.031399]  alloc_page_buffers+0xd1/0x250
      [ 2748.035968]  create_empty_buffers+0x30/0x410
      [ 2748.040730]  create_page_buffers+0x120/0x1b0
      [ 2748.045493]  __block_write_begin_int+0x17a/0x1800
      [ 2748.050740]  iomap_write_begin+0x100/0x2f0
      [ 2748.055308]  iomap_zero_range_actor+0x253/0x5c0
      [ 2748.060362]  iomap_apply+0x157/0x270
      [ 2748.064347]  iomap_zero_range+0x5a/0x80
      [ 2748.068624]  iomap_truncate_page+0x6b/0xa0
      [ 2748.073227]  xfs_setattr_size+0x1f7/0xa10 [xfs]
      [ 2748.078312]  xfs_vn_setattr_size+0x68/0x140 [xfs]
      [ 2748.083589]  xfs_file_fallocate+0x4ac/0x820 [xfs]
      [ 2748.088838]  vfs_fallocate+0x2cf/0x780
      [ 2748.093021]  SyS_fallocate+0x48/0x80
      [ 2748.097006]  do_syscall_64+0x18a/0x430
      [ 2748.101186]  return_from_SYSCALL_64+0x0/0x6a
      [ 2748.105948] Freed:
      [ 2748.108189] PID = 8327
      [ 2748.110816]  save_stack_trace+0x1b/0x20
      [ 2748.115093]  save_stack+0x46/0xd0
      [ 2748.118788]  kasan_slab_free+0x73/0xc0
      [ 2748.122969]  kmem_cache_free+0x7a/0x200
      [ 2748.127247]  free_buffer_head+0x41/0x80
      [ 2748.131524]  try_to_free_buffers+0x178/0x250
      [ 2748.136316]  xfs_vm_releasepage+0x2e9/0x3d0 [xfs]
      [ 2748.141563]  try_to_release_page+0x100/0x180
      [ 2748.146325]  invalidate_inode_pages2_range+0x7da/0xcf0
      [ 2748.152087]  xfs_shift_file_space+0x37d/0x6e0 [xfs]
      [ 2748.157557]  xfs_collapse_file_space+0x49/0x120 [xfs]
      [ 2748.163223]  xfs_file_fallocate+0x2a7/0x820 [xfs]
      [ 2748.168462]  vfs_fallocate+0x2cf/0x780
      [ 2748.172642]  SyS_fallocate+0x48/0x80
      [ 2748.176629]  do_syscall_64+0x18a/0x430
      [ 2748.180810]  return_from_SYSCALL_64+0x0/0x6a
      
      Fixed it by checking on offset against end & breaking out first,
      dereference bh only if there're still bufferheads to process.
      Signed-off-by: default avatarEryu Guan <eguan@redhat.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Reviewed-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      161f55ef
    • Linus Torvalds's avatar
      Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · ab182e67
      Linus Torvalds authored
      Pull arm64 updates from Catalin Marinas:
      
       - kdump support, including two necessary memblock additions:
         memblock_clear_nomap() and memblock_cap_memory_range()
      
       - ARMv8.3 HWCAP bits for JavaScript conversion instructions, complex
         numbers and weaker release consistency
      
       - arm64 ACPI platform MSI support
      
       - arm perf updates: ACPI PMU support, L3 cache PMU in some Qualcomm
         SoCs, Cortex-A53 L2 cache events and DTLB refills, MAINTAINERS update
         for DT perf bindings
      
       - architected timer errata framework (the arch/arm64 changes only)
      
       - support for DMA_ATTR_FORCE_CONTIGUOUS in the arm64 iommu DMA API
      
       - arm64 KVM refactoring to use common system register definitions
      
       - remove support for ASID-tagged VIVT I-cache (no ARMv8 implementation
         using it and deprecated in the architecture) together with some
         I-cache handling clean-up
      
       - PE/COFF EFI header clean-up/hardening
      
       - define BUG() instruction without CONFIG_BUG
      
      * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (92 commits)
        arm64: Fix the DMA mmap and get_sgtable API with DMA_ATTR_FORCE_CONTIGUOUS
        arm64: Print DT machine model in setup_machine_fdt()
        arm64: pmu: Wire-up Cortex A53 L2 cache events and DTLB refills
        arm64: module: split core and init PLT sections
        arm64: pmuv3: handle pmuv3+
        arm64: Add CNTFRQ_EL0 trap handler
        arm64: Silence spurious kbuild warning on menuconfig
        arm64: pmuv3: use arm_pmu ACPI framework
        arm64: pmuv3: handle !PMUv3 when probing
        drivers/perf: arm_pmu: add ACPI framework
        arm64: add function to get a cpu's MADT GICC table
        drivers/perf: arm_pmu: split out platform device probe logic
        drivers/perf: arm_pmu: move irq request/free into probe
        drivers/perf: arm_pmu: split cpu-local irq request/free
        drivers/perf: arm_pmu: rename irq request/free functions
        drivers/perf: arm_pmu: handle no platform_device
        drivers/perf: arm_pmu: simplify cpu_pmu_request_irqs()
        drivers/perf: arm_pmu: factor out pmu registration
        drivers/perf: arm_pmu: fold init into alloc
        drivers/perf: arm_pmu: define armpmu_init_fn
        ...
      ab182e67
    • Mike Snitzer's avatar
      dm cache metadata: fail operations if fail_io mode has been established · 10add84e
      Mike Snitzer authored
      Otherwise it is possible to trigger crashes due to the metadata being
      inaccessible yet these methods don't safely account for that possibility
      without these checks.
      
      Cc: stable@vger.kernel.org
      Reported-by: default avatarMikulas Patocka <mpatocka@redhat.com>
      Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
      10add84e
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 7246f600
      Linus Torvalds authored
      Pull powerpc updates from Michael Ellerman:
       "Highlights include:
      
         - Larger virtual address space on 64-bit server CPUs. By default we
           use a 128TB virtual address space, but a process can request access
           to the full 512TB by passing a hint to mmap().
      
         - Support for the new Power9 "XIVE" interrupt controller.
      
         - TLB flushing optimisations for the radix MMU on Power9.
      
         - Support for CAPI cards on Power9, using the "Coherent Accelerator
           Interface Architecture 2.0".
      
         - The ability to configure the mmap randomisation limits at build and
           runtime.
      
         - Several small fixes and cleanups to the kprobes code, as well as
           support for KPROBES_ON_FTRACE.
      
         - Major improvements to handling of system reset interrupts,
           correctly treating them as NMIs, giving them a dedicated stack and
           using a new hypervisor call to trigger them, all of which should
           aid debugging and robustness.
      
         - Many fixes and other minor enhancements.
      
        Thanks to: Alastair D'Silva, Alexey Kardashevskiy, Alistair Popple,
        Andrew Donnellan, Aneesh Kumar K.V, Anshuman Khandual, Anton
        Blanchard, Balbir Singh, Ben Hutchings, Benjamin Herrenschmidt,
        Bhupesh Sharma, Chris Packham, Christian Zigotzky, Christophe Leroy,
        Christophe Lombard, Daniel Axtens, David Gibson, Gautham R. Shenoy,
        Gavin Shan, Geert Uytterhoeven, Guilherme G. Piccoli, Hamish Martin,
        Hari Bathini, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Mahesh J
        Salgaonkar, Mahesh Salgaonkar, Masami Hiramatsu, Matt Brown, Matthew
        R. Ochs, Michael Neuling, Naveen N. Rao, Nicholas Piggin, Oliver
        O'Halloran, Pan Xinhui, Paul Mackerras, Rashmica Gupta, Russell
        Currey, Sukadev Bhattiprolu, Thadeu Lima de Souza Cascardo, Tobin C.
        Harding, Tyrel Datwyler, Uma Krishnan, Vaibhav Jain, Vipin K Parashar,
        Yang Shi"
      
      * tag 'powerpc-4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (214 commits)
        powerpc/64s: Power9 has no LPCR[VRMASD] field so don't set it
        powerpc/powernv: Fix TCE kill on NVLink2
        powerpc/mm/radix: Drop support for CPUs without lockless tlbie
        powerpc/book3s/mce: Move add_taint() later in virtual mode
        powerpc/sysfs: Move #ifdef CONFIG_HOTPLUG_CPU out of the function body
        powerpc/smp: Document irq enable/disable after migrating IRQs
        powerpc/mpc52xx: Don't select user-visible RTAS_PROC
        powerpc/powernv: Document cxl dependency on special case in pnv_eeh_reset()
        powerpc/eeh: Clean up and document event handling functions
        powerpc/eeh: Avoid use after free in eeh_handle_special_event()
        cxl: Mask slice error interrupts after first occurrence
        cxl: Route eeh events to all drivers in cxl_pci_error_detected()
        cxl: Force context lock during EEH flow
        powerpc/64: Allow CONFIG_RELOCATABLE if COMPILE_TEST
        powerpc/xmon: Teach xmon oops about radix vectors
        powerpc/mm/hash: Fix off-by-one in comment about kernel contexts ids
        powerpc/pseries: Enable VFIO
        powerpc/powernv: Fix iommu table size calculation hook for small tables
        powerpc/powernv: Check kzalloc() return value in pnv_pci_table_alloc
        powerpc: Add arch/powerpc/tools directory
        ...
      7246f600
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace · e579dde6
      Linus Torvalds authored
      Pull namespace updates from Eric Biederman:
       "This is a set of small fixes that were mostly stumbled over during
        more significant development. This proc fix and the fix to
        posix-timers are the most significant of the lot.
      
        There is a lot of good development going on but unfortunately it
        didn't quite make the merge window"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
        proc: Fix unbalanced hard link numbers
        signal: Make kill_proc_info static
        rlimit: Properly call security_task_setrlimit
        signal: Remove unused definition of sig_user_definied
        ia64: Remove unused IA64_TASK_SIGHAND_OFFSET and IA64_SIGHAND_SIGLOCK_OFFSET
        ipc: Remove unused declaration of recompute_msgmni
        posix-timers: Correct sanity check in posix_cpu_nsleep
        sysctl: Remove dead register_sysctl_root
      e579dde6