1. 04 Feb, 2016 1 commit
    • Takashi Iwai's avatar
      ALSA: timer: Fix leftover link at closing · 094fd3be
      Takashi Iwai authored
      In ALSA timer core, the active timer instance is managed in
      active_list linked list.  Each element is added / removed dynamically
      at timer start, stop and in timer interrupt.  The problem is that
      snd_timer_interrupt() has a thinko and leaves the element in
      active_list when it's the last opened element.  This eventually leads
      to list corruption or use-after-free error.
      
      This hasn't been revealed because we used to delete the list forcibly
      in snd_timer_stop() in the past.  However, the recent fix avoids the
      double-stop behavior (in commit [f784beb7: ALSA: timer: Fix link
      corruption due to double start or stop]), and this leak hits reality.
      
      This patch fixes the link management in snd_timer_interrupt().  Now it
      simply unlinks no matter which stream is.
      
      BugLink: http://lkml.kernel.org/r/CACT4Y+Yy2aukHP-EDp8-ziNqNNmb-NTf=jDWXMP7jB8HDa2vng@mail.gmail.comReported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      094fd3be
  2. 03 Feb, 2016 8 commits
    • Takashi Iwai's avatar
      2e5dc73f
    • Takashi Iwai's avatar
      ALSA: seq: Fix lockdep warnings due to double mutex locks · 7f0973e9
      Takashi Iwai authored
      The port subscription code uses double mutex locks for source and
      destination ports, and this may become racy once when wrongly set up.
      It leads to lockdep warning splat, typically triggered by fuzzer like
      syzkaller, although the actual deadlock hasn't been seen, so far.
      
      This patch simplifies the handling by reducing to two single locks, so
      that no lockdep warning will be trigger any longer.
      
      By splitting to two actions, a still-in-progress element shall be
      added in one list while handling another.  For ignoring this element,
      a new check is added in deliver_to_subscribers().
      
      Along with it, the code to add/remove the subscribers list element was
      cleaned up and refactored.
      
      BugLink: http://lkml.kernel.org/r/CACT4Y+aKQXV7xkBW9hpQbzaDO7LrUvohxWh-UwMxXjDy-yBD=A@mail.gmail.comReported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Tested-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      7f0973e9
    • Takashi Iwai's avatar
      ALSA: rawmidi: Fix race at copying & updating the position · 81f57754
      Takashi Iwai authored
      The rawmidi read and write functions manage runtime stream status
      such as runtime->appl_ptr and runtime->avail.  These point where to
      copy the new data and how many bytes have been copied (or to be
      read).  The problem is that rawmidi read/write call copy_from_user()
      or copy_to_user(), and the runtime spinlock is temporarily unlocked
      and relocked while copying user-space.  Since the current code
      advances and updates the runtime status after the spin unlock/relock,
      the copy and the update may be asynchronous, and eventually
      runtime->avail might go to a negative value when many concurrent
      accesses are done.  This may lead to memory corruption in the end.
      
      For fixing this race, in this patch, the status update code is
      performed in the same lock before the temporary unlock.  Also, the
      spinlock is now taken more widely in snd_rawmidi_kernel_read1() for
      protecting more properly during the whole operation.
      
      BugLink: http://lkml.kernel.org/r/CACT4Y+b-dCmNf1GpgPKfDO0ih+uZCL2JV4__j-r1kdhPLSgQCQ@mail.gmail.comReported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Tested-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      81f57754
    • Takashi Iwai's avatar
      ALSA: rawmidi: Make snd_rawmidi_transmit() race-free · 06ab3003
      Takashi Iwai authored
      A kernel WARNING in snd_rawmidi_transmit_ack() is triggered by
      syzkaller fuzzer:
        WARNING: CPU: 1 PID: 20739 at sound/core/rawmidi.c:1136
      Call Trace:
       [<     inline     >] __dump_stack lib/dump_stack.c:15
       [<ffffffff82999e2d>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50
       [<ffffffff81352089>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:482
       [<ffffffff813522b9>] warn_slowpath_null+0x29/0x30 kernel/panic.c:515
       [<ffffffff84f80bd5>] snd_rawmidi_transmit_ack+0x275/0x400 sound/core/rawmidi.c:1136
       [<ffffffff84fdb3c1>] snd_virmidi_output_trigger+0x4b1/0x5a0 sound/core/seq/seq_virmidi.c:163
       [<     inline     >] snd_rawmidi_output_trigger sound/core/rawmidi.c:150
       [<ffffffff84f87ed9>] snd_rawmidi_kernel_write1+0x549/0x780 sound/core/rawmidi.c:1223
       [<ffffffff84f89fd3>] snd_rawmidi_write+0x543/0xb30 sound/core/rawmidi.c:1273
       [<ffffffff817b0323>] __vfs_write+0x113/0x480 fs/read_write.c:528
       [<ffffffff817b1db7>] vfs_write+0x167/0x4a0 fs/read_write.c:577
       [<     inline     >] SYSC_write fs/read_write.c:624
       [<ffffffff817b50a1>] SyS_write+0x111/0x220 fs/read_write.c:616
       [<ffffffff86336c36>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185
      
      Also a similar warning is found but in another path:
      Call Trace:
       [<     inline     >] __dump_stack lib/dump_stack.c:15
       [<ffffffff82be2c0d>] dump_stack+0x6f/0xa2 lib/dump_stack.c:50
       [<ffffffff81355139>] warn_slowpath_common+0xd9/0x140 kernel/panic.c:482
       [<ffffffff81355369>] warn_slowpath_null+0x29/0x30 kernel/panic.c:515
       [<ffffffff8527e69a>] rawmidi_transmit_ack+0x24a/0x3b0 sound/core/rawmidi.c:1133
       [<ffffffff8527e851>] snd_rawmidi_transmit_ack+0x51/0x80 sound/core/rawmidi.c:1163
       [<ffffffff852d9046>] snd_virmidi_output_trigger+0x2b6/0x570 sound/core/seq/seq_virmidi.c:185
       [<     inline     >] snd_rawmidi_output_trigger sound/core/rawmidi.c:150
       [<ffffffff85285a0b>] snd_rawmidi_kernel_write1+0x4bb/0x760 sound/core/rawmidi.c:1252
       [<ffffffff85287b73>] snd_rawmidi_write+0x543/0xb30 sound/core/rawmidi.c:1302
       [<ffffffff817ba5f3>] __vfs_write+0x113/0x480 fs/read_write.c:528
       [<ffffffff817bc087>] vfs_write+0x167/0x4a0 fs/read_write.c:577
       [<     inline     >] SYSC_write fs/read_write.c:624
       [<ffffffff817bf371>] SyS_write+0x111/0x220 fs/read_write.c:616
       [<ffffffff86660276>] entry_SYSCALL_64_fastpath+0x16/0x7a arch/x86/entry/entry_64.S:185
      
      In the former case, the reason is that virmidi has an open code
      calling snd_rawmidi_transmit_ack() with the value calculated outside
      the spinlock.   We may use snd_rawmidi_transmit() in a loop just for
      consuming the input data, but even there, there is a race between
      snd_rawmidi_transmit_peek() and snd_rawmidi_tranmit_ack().
      
      Similarly in the latter case, it calls snd_rawmidi_transmit_peek() and
      snd_rawmidi_tranmit_ack() separately without protection, so they are
      racy as well.
      
      The patch tries to address these issues by the following ways:
      - Introduce the unlocked versions of snd_rawmidi_transmit_peek() and
        snd_rawmidi_transmit_ack() to be called inside the explicit lock.
      - Rewrite snd_rawmidi_transmit() to be race-free (the former case).
      - Make the split calls (the latter case) protected in the rawmidi spin
        lock.
      
      BugLink: http://lkml.kernel.org/r/CACT4Y+YPq1+cYLkadwjWa5XjzF1_Vki1eHnVn-Lm0hzhSpu5PA@mail.gmail.com
      BugLink: http://lkml.kernel.org/r/CACT4Y+acG4iyphdOZx47Nyq_VHGbpJQK-6xNpiqUjaZYqsXOGw@mail.gmail.comReported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Tested-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      06ab3003
    • Takashi Iwai's avatar
      ALSA: hda - Add fixup for Mac Mini 7,1 model · 2154cc0e
      Takashi Iwai authored
      Mac Mini 7,1 model with CS4208 codec reports the headphone jack
      detection wrongly in an inverted way.  Moreover, the advertised pins
      for the audio input and SPDIF output have actually no jack detection.
      
      This patch addresses these issues.  The inv_jack_detect flag is set
      for fixing the headphone jack detection, and the pin configs for audio
      input and SPDIF output are marked as non-detectable.
      
      Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=105161
      Report-and-tested-by: moosotc@gmail.com
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      2154cc0e
    • Kailang Yang's avatar
      ALSA: hda/realtek - Support headset mode for ALC225 · 4cc9b9d6
      Kailang Yang authored
      Support headset mode for ALC225 platforms.
      Signed-off-by: default avatarKailang Yang <kailang@realtek.com>
      Cc: <stable@vger.kernel.org> # v4.4+
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      4cc9b9d6
    • Kailang Yang's avatar
      ALSA: hda/realtek - Support Dell headset mode for ALC225 · cfc5a845
      Kailang Yang authored
      Dell create new platform with ALC298 codec.
      This patch will enable headset mode for ALC225/ALC3253 platform.
      Signed-off-by: default avatarKailang Yang <kailang@realtek.com>
      Cc: <stable@vger.kernel.org> # v4.4+
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      cfc5a845
    • Kailang Yang's avatar
      ALSA: hda/realtek - New codec support of ALC225 · 4231430d
      Kailang Yang authored
      Add new support for ALC225, yet another variant of ALC298 codec.
      Signed-off-by: default avatarKailang Yang <kailang@realtek.com>
      Cc: <stable@vger.kernel.org> # 4.4+
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      4231430d
  3. 02 Feb, 2016 1 commit
    • Takashi Iwai's avatar
      ALSA: timer: Sync timer deletion at closing the system timer · f146357f
      Takashi Iwai authored
      ALSA timer core framework has no sync point at stopping because it's
      called inside the spinlock.  Thus we need a sync point at close for
      avoiding the stray timer task.  This is simply done by implementing
      the close callback just calling del_timer_sync().  (It's harmless to
      call it unconditionally, as the core timer itself cares of the already
      deleted timer instance.)
      Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      f146357f
  4. 01 Feb, 2016 5 commits
  5. 29 Jan, 2016 6 commits
  6. 28 Jan, 2016 2 commits
  7. 27 Jan, 2016 1 commit
  8. 26 Jan, 2016 2 commits
  9. 25 Jan, 2016 3 commits
  10. 24 Jan, 2016 11 commits
    • Linus Torvalds's avatar
      Linux 4.5-rc1 · 92e963f5
      Linus Torvalds authored
      92e963f5
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · e2464688
      Linus Torvalds authored
      Pull MIPS updates from Ralf Baechle:
       "This is the main pull request for MIPS for 4.5 plus some 4.4 fixes.
      
        The executive summary:
      
         - ATH79 platform improvments, use DT bindings for the ATH79 USB PHY.
         - Avoid useless rebuilds for zboot.
         - jz4780: Add NEMC, BCH and NAND device tree nodes
         - Initial support for the MicroChip's DT platform.  As all the device
           drivers are missing this is still of limited use.
         - Some Loongson3 cleanups.
         - The unavoidable whitespace polishing.
         - Reduce clock skew when synchronizing the CPU cycle counters on CPU
           startup.
         - Add MIPS R6 fixes.
         - Lots of cleanups across arch/mips as fallout from KVM.
         - Lots of minor fixes and changes for IEEE 754-2008 support to the
           FPU emulator / fp-assist software.
         - Minor Ralink, BCM47xx and bcm963xx platform support improvments.
         - Support SMP on BCM63168"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (84 commits)
        MIPS: zboot: Add support for serial debug using the PROM
        MIPS: zboot: Avoid useless rebuilds
        MIPS: BMIPS: Enable ARCH_WANT_OPTIONAL_GPIOLIB
        MIPS: bcm63xx: nvram: Remove unused bcm63xx_nvram_get_psi_size() function
        MIPS: bcm963xx: Update bcm_tag field image_sequence
        MIPS: bcm963xx: Move extended flash address to bcm_tag header file
        MIPS: bcm963xx: Move Broadcom BCM963xx image tag data structure
        MIPS: bcm63xx: nvram: Use nvram structure definition from header file
        MIPS: bcm963xx: Add Broadcom BCM963xx board nvram data structure
        MAINTAINERS: Add KVM for MIPS entry
        MIPS: KVM: Add missing newline to kvm_err()
        MIPS: Move KVM specific opcodes into asm/inst.h
        MIPS: KVM: Use cacheops.h definitions
        MIPS: Break down cacheops.h definitions
        MIPS: Use EXCCODE_ constants with set_except_vector()
        MIPS: Update trap codes
        MIPS: Move Cause.ExcCode trap codes to mipsregs.h
        MIPS: KVM: Make kvm_mips_{init,exit}() static
        MIPS: KVM: Refactor added offsetof()s
        MIPS: KVM: Convert EXPORT_SYMBOL to _GPL
        ...
      e2464688
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v4.5-2' of... · e1c10879
      Linus Torvalds authored
      Merge tag 'platform-drivers-x86-v4.5-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
      
      Pull x86 platform driver updates from Darren Hart:
       "Emergency travel prevented me from completing my final testing on this
        until today.  Nothing here that couldn't wait until RC1 fixes, but I
        thought it best to get it out sooner rather than later as it does
        contain a build warning fix.
      
        Summary:
      
        A build warning fix, MAINTAINERS cleanup, and a new DMI quirk:
      
        ideapad-laptop:
         - Add Lenovo Yoga 700 to no_hw_rfkill dmi list
      
        MAINTAINERS:
         - Combine multiple telemetry entries
      
        intel_telemetry_debugfs:
         - Fix unused warnings in telemetry debugfs"
      
      * tag 'platform-drivers-x86-v4.5-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
        ideapad-laptop: Add Lenovo Yoga 700 to no_hw_rfkill dmi list
        MAINTAINERS: Combine multiple telemetry entries
        intel_telemetry_debugfs: Fix unused warnings in telemetry debugfs
      e1c10879
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · 81f05fee
      Linus Torvalds authored
      Pull thermal management updates from Zhang Rui:
       "The top merge commit was re-generated yesterday because two topic
        branches were dropped from this pull request in the last minute due to
        some unaddressed comments.  All the other material has been in
        linux-next for quite a while.
      
        Specifics:
      
         - Enhance thermal core to handle unexpected device cooling states
           after fresh boot and system resume.  From Zhang Rui and Chen Yu.
      
         - Several fixes and cleanups on Rockchip and RCAR thermal drivers.
           From Caesar Wang and Kuninori Morimoto.
      
         - Add Broxton support for Intel processor thermal reporting device
           driver.  From Amy Wiles"
      
      * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        thermal: trip_point_temp_store() calls thermal_zone_device_update()
        thermal: rcar: rcar_thermal_get_temp() return error if strange temp
        thermal: rcar: check irq possibility in rcar_thermal_irq_xxx()
        thermal: rcar: check every rcar_thermal_update_temp() return value
        thermal: rcar: move rcar_thermal_dt_ids to upside
        thermal: rockchip: Support the RK3399 SoCs in thermal driver
        thermal: rockchip: Support the RK3228 SoCs in thermal driver
        dt-bindings: rockchip-thermal: Support the RK3228/RK3399 SoCs compatible
        thermal: rockchip: fix a trivial typo
        Thermal: Enable Broxton SoC thermal reporting device
        thermal: constify pch_dev_ops structure
        Thermal: do thermal zone update after a cooling device registered
        Thermal: handle thermal zone device properly during system sleep
        Thermal: initialize thermal zone device correctly
      81f05fee
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs · c52cb431
      Linus Torvalds authored
      Pull 9p updates from Eric Van Hensbergen:
       "Sorry for the last minute pull request, there's was a change that
        didn't get pulled into for-next until two weeks ago and I wanted to
        give it some bake time.
      
        Summary:
      
        Rework and error handling fixes, primarily in the fscatch and fd
        transports"
      
      * tag 'for-linus-4.5-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
        fs/9p: use fscache mutex rather than spinlock
        9p: trans_fd, bail out if recv fcall if missing
        9p: trans_fd, read rework to use p9_parse_header
        net/9p: Add device name details on error
      c52cb431
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · 00e3f5cc
      Linus Torvalds authored
      Pull Ceph updates from Sage Weil:
       "The two main changes are aio support in CephFS, and a series that
        fixes several issues in the authentication key timeout/renewal code.
      
        On top of that are a variety of cleanups and minor bug fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
        libceph: remove outdated comment
        libceph: kill off ceph_x_ticket_handler::validity
        libceph: invalidate AUTH in addition to a service ticket
        libceph: fix authorizer invalidation, take 2
        libceph: clear messenger auth_retry flag if we fault
        libceph: fix ceph_msg_revoke()
        libceph: use list_for_each_entry_safe
        ceph: use i_size_{read,write} to get/set i_size
        ceph: re-send AIO write request when getting -EOLDSNAP error
        ceph: Asynchronous IO support
        ceph: Avoid to propagate the invalid page point
        ceph: fix double page_unlock() in page_mkwrite()
        rbd: delete an unnecessary check before rbd_dev_destroy()
        libceph: use list_next_entry instead of list_entry_next
        ceph: ceph_frag_contains_value can be boolean
        ceph: remove unused functions in ceph_frag.h
      00e3f5cc
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6 · 772950ed
      Linus Torvalds authored
      Pull SMB3 fixes from Steve French:
       "A collection of CIFS/SMB3 fixes.
      
        It includes a couple bug fixes, a few for improved debugging of
        cifs.ko and some improvements to the way cifs does key generation.
      
        I do have some additional bug fixes I expect in the next week or two
        (to address a problem found by xfstest, and some fixes for SMB3.11
        dialect, and a couple patches that just came in yesterday that I am
        reviewing)"
      
      * 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
        cifs_dbg() outputs an uninitialized buffer in cifs_readdir()
        cifs: fix race between call_async() and reconnect()
        Prepare for encryption support (first part). Add decryption and encryption key generation. Thanks to Metze for helping with this.
        cifs: Allow using O_DIRECT with cache=loose
        cifs: Make echo interval tunable
        cifs: Check uniqueid for SMB2+ and return -ESTALE if necessary
        Print IP address of unresponsive server
        cifs: Ratelimit kernel log messages
      772950ed
    • Josh Boyer's avatar
      ideapad-laptop: Add Lenovo Yoga 700 to no_hw_rfkill dmi list · 6b31de3e
      Josh Boyer authored
      Like the Yoga 900 models the Lenovo Yoga 700 does not have a
      hw rfkill switch, and trying to read the hw rfkill switch through the
      ideapad module causes it to always reported blocking breaking wifi.
      
      This commit adds the Lenovo Yoga 700 to the no_hw_rfkill dmi list, fixing
      the wifi breakage.
      
      BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1295272
      Tested-by: <dinyar.rabady+spam@gmail.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJosh Boyer <jwboyer@fedoraproject.org>
      Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
      6b31de3e
    • Souvik Kumar Chakravarty's avatar
      MAINTAINERS: Combine multiple telemetry entries · f1fc3cd8
      Souvik Kumar Chakravarty authored
      This patch combines all the telemetry file entries in MAINTAINERS via
      wildcard.
      Signed-off-by: default avatarSouvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
      Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
      f1fc3cd8
    • Souvik Kumar Chakravarty's avatar
      intel_telemetry_debugfs: Fix unused warnings in telemetry debugfs · 7885f2f9
      Souvik Kumar Chakravarty authored
      This patch fixes compile time warnings when CONFIG_PM_SLEEP
      is undefined. In this case sleep related counters are unused.
      Signed-off-by: default avatarSouvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
      Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
      7885f2f9
    • Christoph Lameter's avatar
      vmstat: Remove BUG_ON from vmstat_update · 587198ba
      Christoph Lameter authored
      If we detect that there is nothing to do just set the flag and do not
      check if it was already set before.  Races really do not matter.  If the
      flag is set by any code then the shepherd will start dealing with the
      situation and reenable the vmstat workers when necessary again.
      
      Since commit 0eb77e98 ("vmstat: make vmstat_updater deferrable again
      and shut down on idle") quiet_vmstat might update cpu_stat_off and mark
      a particular cpu to be handled by vmstat_shepherd.  This might trigger a
      VM_BUG_ON in vmstat_update because the work item might have been
      sleeping during the idle period and see the cpu_stat_off updated after
      the wake up.  The VM_BUG_ON is therefore misleading and no more
      appropriate.  Moreover it doesn't really suite any protection from real
      bugs because vmstat_shepherd will simply reschedule the vmstat_work
      anytime it sees a particular cpu set or vmstat_update would do the same
      from the worker context directly.  Even when the two would race the
      result wouldn't be incorrect as the counters update is fully idempotent.
      Reported-by: default avatarSasha Levin <sasha.levin@oracle.com>
      Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
      Acked-by: default avatarMichal Hocko <mhocko@suse.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      587198ba