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  1. 21 Feb, 2020 6 commits
    • SeongJae Park's avatar
      selftests/vm: add missed tests in run_vmtests · 9e69fa46
      SeongJae Park authored 
      The commits introducing 'mlock-random-test'[1], 'map_fiex_noreplace'[2],
and 'thuge-gen'[3] have not added those in the 'run_vmtests' script and
thus the 'run_tests' command of kselftests doesn't run those.  This
commit adds those in the script.

'gup_benchmark' and 'transhuge-stress' are also not included in the
'run_vmtests', but this commit does not add those because those are for
performance measurement rather than pass/fail tests.

[1] commit 26b4224d ("selftests: expanding more mlock selftest")
[2] commit 91cbacc3 ("tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE")
[3] commit fcc1f2d5 ("selftests: add a test program for variable huge page sizes in mmap/shmget")

Link: http://lkml.kernel.org/r/20200206085144.29126-1-sj38.park@gmail.comSigned-off-by: default avatarSeongJae Park <sjpark@amazon.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9e69fa46
    • Christian Borntraeger's avatar
      include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap · 467d12f5
      Christian Borntraeger authored 
      QEMU has a funny new build error message when I use the upstream kernel
headers:

      CC      block/file-posix.o
    In file included from /home/cborntra/REPOS/qemu/include/qemu/timer.h:4,
                     from /home/cborntra/REPOS/qemu/include/qemu/timed-average.h:29,
                     from /home/cborntra/REPOS/qemu/include/block/accounting.h:28,
                     from /home/cborntra/REPOS/qemu/include/block/block_int.h:27,
                     from /home/cborntra/REPOS/qemu/block/file-posix.c:30:
    /usr/include/linux/swab.h: In function `__swab':
    /home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:34: error: "sizeof" is not defined, evaluates to 0 [-Werror=undef]
       20 | #define BITS_PER_LONG           (sizeof (unsigned long) * BITS_PER_BYTE)
          |                                  ^~~~~~
    /home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:41: error: missing binary operator before token "("
       20 | #define BITS_PER_LONG           (sizeof (unsigned long) * BITS_PER_BYTE)
          |                                         ^
    cc1: all warnings being treated as errors
    make: *** [/home/cborntra/REPOS/qemu/rules.mak:69: block/file-posix.o] Error 1
    rm tests/qemu-iotests/socket_scm_helper.o

This was triggered by commit d5767057 ("uapi: rename ext2_swab() to
swab() and share globally in swab.h").  That patch is doing

  #include <asm/bitsperlong.h>

but it uses BITS_PER_LONG.

The kernel file asm/bitsperlong.h provide only __BITS_PER_LONG.

Let us use the __ variant in swap.h

Link: http://lkml.kernel.org/r/20200213142147.17604-1-borntraeger@de.ibm.com
Fixes: d5767057 ("uapi: rename ext2_swab() to swab() and share globally in swab.h")
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Joe Perches <joe@perches.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      467d12f5
    • Ioanna Alifieraki's avatar
      Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()" · edf28f40
      Ioanna Alifieraki authored 
      This reverts commit a9795584.

Commit a9795584 ("ipc,sem: remove uneeded sem_undo_list lock usage
in exit_sem()") removes a lock that is needed.  This leads to a process
looping infinitely in exit_sem() and can also lead to a crash.  There is
a reproducer available in [1] and with the commit reverted the issue
does not reproduce anymore.

Using the reproducer found in [1] is fairly easy to reach a point where
one of the child processes is looping infinitely in exit_sem between
for(;;) and if (semid == -1) block, while it's trying to free its last
sem_undo structure which has already been freed by freeary().

Each sem_undo struct is on two lists: one per semaphore set (list_id)
and one per process (list_proc).  The list_id list tracks undos by
semaphore set, and the list_proc by process.

Undo structures are removed either by freeary() or by exit_sem().  The
freeary function is invoked when the user invokes a syscall to remove a
semaphore set.  During this operation freeary() traverses the list_id
associated with the semaphore set and removes the undo structures from
both the list_id and list_proc lists.

For this case, exit_sem() is called at process exit.  Each process
contains a struct sem_undo_list (referred to as "ulp") which contains
the head for the list_proc list.  When the process exits, exit_sem()
traverses this list to remove each sem_undo struct.  As in freeary(),
whenever a sem_undo struct is removed from list_proc, it is also removed
from the list_id list.

Removing elements from list_id is safe for both exit_sem() and freeary()
due to sem_lock().  Removing elements from list_proc is not safe;
freeary() locks &un->ulp->lock when it performs
list_del_rcu(&un->list_proc) but exit_sem() does not (locking was
removed by commit a9795584 ("ipc,sem: remove uneeded sem_undo_list
lock usage in exit_sem()").

This can result in the following situation while executing the
reproducer [1] : Consider a child process in exit_sem() and the parent
in freeary() (because of semctl(sid[i], NSEM, IPC_RMID)).

 - The list_proc for the child contains the last two undo structs A and
   B (the rest have been removed either by exit_sem() or freeary()).

 - The semid for A is 1 and semid for B is 2.

 - exit_sem() removes A and at the same time freeary() removes B.

 - Since A and B have different semid sem_lock() will acquire different
   locks for each process and both can proceed.

The bug is that they remove A and B from the same list_proc at the same
time because only freeary() acquires the ulp lock. When exit_sem()
removes A it makes ulp->list_proc.next to point at B and at the same
time freeary() removes B setting B->semid=-1.

At the next iteration of for(;;) loop exit_sem() will try to remove B.

The only way to break from for(;;) is for (&un->list_proc ==
&ulp->list_proc) to be true which is not. Then exit_sem() will check if
B->semid=-1 which is and will continue looping in for(;;) until the
memory for B is reallocated and the value at B->semid is changed.

At that point, exit_sem() will crash attempting to unlink B from the
lists (this can be easily triggered by running the reproducer [1] a
second time).

To prove this scenario instrumentation was added to keep information
about each sem_undo (un) struct that is removed per process and per
semaphore set (sma).

          CPU0                                CPU1
  [caller holds sem_lock(sma for A)]      ...
  freeary()                               exit_sem()
  ...                                     ...
  ...                                     sem_lock(sma for B)
  spin_lock(A->ulp->lock)                 ...
  list_del_rcu(un_A->list_proc)           list_del_rcu(un_B->list_proc)

Undo structures A and B have different semid and sem_lock() operations
proceed.  However they belong to the same list_proc list and they are
removed at the same time.  This results into ulp->list_proc.next
pointing to the address of B which is already removed.

After reverting commit a9795584 ("ipc,sem: remove uneeded
sem_undo_list lock usage in exit_sem()") the issue was no longer
reproducible.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1694779

Link: http://lkml.kernel.org/r/20191211191318.11860-1-ioanna-maria.alifieraki@canonical.com
Fixes: a9795584 ("ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()")
Signed-off-by: default avatarIoanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
Acked-by: default avatarManfred Spraul <manfred@colorfullife.com>
Acked-by: default avatarHerton R. Krzesinski <herton@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: <malat@debian.org>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Jay Vosburgh <jay.vosburgh@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      edf28f40
    • Arnd Bergmann's avatar
      y2038: hide timeval/timespec/itimerval/itimerspec types · c766d147
      Arnd Bergmann authored 
      There are no in-kernel users remaining, but there may still be users that
include linux/time.h instead of sys/time.h from user space, so leave the
types available to user space while hiding them from kernel space.

Only the __kernel_old_* versions of these types remain now.

Link: http://lkml.kernel.org/r/20200110154232.4104492-4-arnd@arndb.deSigned-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c766d147
    • Arnd Bergmann's avatar
      y2038: remove unused time32 interfaces · 412c53a6
      Arnd Bergmann authored 
      No users remain, so kill these off before we grow new ones.

Link: http://lkml.kernel.org/r/20200110154232.4104492-3-arnd@arndb.deSigned-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      412c53a6
    • Arnd Bergmann's avatar
      y2038: remove ktime to/from timespec/timeval conversion · 595abbaf
      Arnd Bergmann authored 
      A couple of helpers are now obsolete and can be removed, so drivers can no
longer start using them and instead use y2038-safe interfaces.

Link: http://lkml.kernel.org/r/20200110154232.4104492-2-arnd@arndb.deSigned-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      595abbaf
  3. 20 Feb, 2020 1 commit
  5. 19 Feb, 2020 5 commits
    • Linus Torvalds's avatar
      Merge tag 'iommu-fixes-v5.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 4b205766
      Linus Torvalds authored 
      Pull iommu fixes from Joerg Roedel:

 - Compile warning fix for the Intel IOMMU driver

 - Fix kdump boot with Intel IOMMU enabled and in passthrough mode

 - Disable AMD IOMMU on a Laptop/Embedded platform because the delay it
   introduces in DMA transactions causes screen flickering there with 4k
   monitors

 - Make domain_free function in QCOM IOMMU driver robust and not leak
   memory/dereference NULL pointers

 - Fix ARM-SMMU module parameter prefix names

* tag 'iommu-fixes-v5.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/arm-smmu: Restore naming of driver parameter prefix
  iommu/qcom: Fix bogus detach logic
  iommu/amd: Disable IOMMU on Stoney Ridge systems
  iommu/vt-d: Simplify check in identity_mapping()
  iommu/vt-d: Remove deferred_attach_domain()
  iommu/vt-d: Do deferred attachment in iommu_need_mapping()
  iommu/vt-d: Move deferred device attachment into helper function
  iommu/vt-d: Add attach_deferred() helper
  iommu/vt-d: Fix compile warning from intel-svm.h
      4b205766
    • Linus Torvalds's avatar
      Merge tag 'sound-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · fa079ba8
      Linus Torvalds authored 
      Pull sound fixes from Takashi Iwai:
 "The only largish change in this pull request is about the revert of
  the recent max98090 and its relevant patches due to regressions.

  Other than that, all small fixes for ALSA core (covering KCSAN fuzzer
  warnings in ALSA sequencer and rawmidi), Intel SOF HD-audio fixes, AMD
  ACP fixes, usual HD-audio quirks, and various ASoC fixes"

* tag 'sound-5.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda: Use scnprintf() for printing texts for sysfs/procfs
  ALSA: hda/realtek - Apply quirk for yet another MSI laptop
  ASoC: sun8i-codec: Fix setting DAI data format
  ALSA: hda/realtek - Apply quirk for MSI GP63, too
  ASoC: amd: ACP needs to be powered off in BIOS.
  ASoC: hdmi-codec: set plugged_cb to NULL when component removing
  ASoC: dapm: remove snd_soc_dapm_put_enum_double_locked
  ASoC: max98090: revert invalid fix for handling SHDN
  ALSA: rawmidi: Avoid bit fields for state flags
  ALSA: seq: Fix concurrent access to queue current tick/time
  ALSA: seq: Avoid concurrent access to queue flags
  ASoC: codec2codec: avoid invalid/double-free of pcm runtime
  ASoC: amd: Buffer Size instead of MAX Buffer
  ASoC: SOF: Intel: hda: move i915 init earlier
  ASoC: SOF: Intel: hda: fix ordering bug in resume flow
  ALSA: hda: do not override bus codec_mask in link_get()
  ASoC: atmel: fix atmel_ssc_set_audio link failure
  ASoC: fsl_sai: Fix exiting path on probing failure
      fa079ba8
    • Will Deacon's avatar
      iommu/arm-smmu: Restore naming of driver parameter prefix · ab362fff
      Will Deacon authored 
      Extending the Arm SMMU driver to allow for modular builds changed
KBUILD_MODNAME to be "arm_smmu_mod" so that a single module could be
built from the multiple existing object files without the need to rename
any source files.

This inadvertently changed the name of the driver parameters, which may
lead to runtime issues if bootloaders are relying on the old names for
correctness (e.g. "arm-smmu.disable_bypass=0").

Although MODULE_PARAM_PREFIX can be overridden to restore the old naming
for builtin parameters, only the new name is matched by modprobe and so
loading the driver as a module would cause parameters specified on the
kernel command line to be ignored. Instead, rename "arm_smmu_mod" to
"arm_smmu". Whilst it's a bit of a bodge, this allows us to create a
single module without renaming any files and makes use of the fact that
underscores and hyphens can be used interchangeably in parameter names.

Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Reported-by: default avatarLi Yang <leoyang.li@nxp.com>
Fixes: cd221bd2 ("iommu/arm-smmu: Allow building as a module")
Signed-off-by: default avatarWill Deacon <will@kernel.org>
Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
      ab362fff
    • Robin Murphy's avatar
      iommu/qcom: Fix bogus detach logic · faf305c5
      Robin Murphy authored 
      Currently, the implementation of qcom_iommu_domain_free() is guaranteed
to do one of two things: WARN() and leak everything, or dereference NULL
and crash. That alone is terrible, but in fact the whole idea of trying
to track the liveness of a domain via the qcom_domain->iommu pointer as
a sanity check is full of fundamentally flawed assumptions. Make things
robust and actually functional by not trying to be quite so clever.
Reported-by: default avatarBrian Masney <masneyb@onstation.org>
Tested-by: default avatarBrian Masney <masneyb@onstation.org>
Reported-by: default avatarNaresh Kamboju <naresh.kamboju@linaro.org>
Fixes: 0ae349a0 ("iommu/qcom: Add qcom_iommu")
Signed-off-by: default avatarRobin Murphy <robin.murphy@arm.com>
Tested-by: default avatarStephan Gerhold <stephan@gerhold.net>
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
      faf305c5
    • Kai-Heng Feng's avatar
      iommu/amd: Disable IOMMU on Stoney Ridge systems · 3dfee47b
      Kai-Heng Feng authored 
      Serious screen flickering when Stoney Ridge outputs to a 4K monitor.

Use identity-mapping and PCI ATS doesn't help this issue.

According to Alex Deucher, IOMMU isn't enabled on Windows, so let's do
the same here to avoid screen flickering on 4K monitor.

Cc: Alex Deucher <alexander.deucher@amd.com>
Bug: https://gitlab.freedesktop.org/drm/amd/issues/961Signed-off-by: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
      3dfee47b
  7. 18 Feb, 2020 12 commits
  9. 17 Feb, 2020 8 commits
  11. 16 Feb, 2020 8 commits
    • Linus Torvalds's avatar
      Linux 5.6-rc2 · 11a48a5a
      Linus Torvalds authored
      11a48a5a
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.6-1' of https://github.com/cminyard/linux-ipmi · ab02b61f
      Linus Torvalds authored 
      Pull IPMI update from Corey Minyard:
 "Minor bug fixes for IPMI

  I know this is late; I've been travelling and, well, I've been
  distracted.

  This is just a few bug fixes and adding i2c support to the IPMB
  driver, which is something I wanted from the beginning for it"

* tag 'for-linus-5.6-1' of https://github.com/cminyard/linux-ipmi:
  drivers: ipmi: fix off-by-one bounds check that leads to a out-of-bounds write
  ipmi:ssif: Handle a possible NULL pointer reference
  drivers: ipmi: Modify max length of IPMB packet
  drivers: ipmi: Support raw i2c packet in IPMB
      ab02b61f
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 44024adb
      Linus Torvalds authored 
      Pull KVM fixes from Paolo Bonzini:
 "Bugfixes and improvements to selftests.

  On top of this, Mauro converted the KVM documentation to rst format,
  which was very welcome"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (44 commits)
  docs: virt: guest-halt-polling.txt convert to ReST
  docs: kvm: review-checklist.txt: rename to ReST
  docs: kvm: Convert timekeeping.txt to ReST format
  docs: kvm: Convert s390-diag.txt to ReST format
  docs: kvm: Convert ppc-pv.txt to ReST format
  docs: kvm: Convert nested-vmx.txt to ReST format
  docs: kvm: Convert mmu.txt to ReST format
  docs: kvm: Convert locking.txt to ReST format
  docs: kvm: Convert hypercalls.txt to ReST format
  docs: kvm: arm/psci.txt: convert to ReST
  docs: kvm: convert arm/hyp-abi.txt to ReST
  docs: kvm: Convert api.txt to ReST format
  docs: kvm: convert devices/xive.txt to ReST
  docs: kvm: convert devices/xics.txt to ReST
  docs: kvm: convert devices/vm.txt to ReST
  docs: kvm: convert devices/vfio.txt to ReST
  docs: kvm: convert devices/vcpu.txt to ReST
  docs: kvm: convert devices/s390_flic.txt to ReST
  docs: kvm: convert devices/mpic.txt to ReST
  docs: kvm: convert devices/arm-vgit.txt to ReST
  ...
      44024adb
    • Linus Torvalds's avatar
      Merge tag 'edac_urgent_for_5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras · b982df72
      Linus Torvalds authored 
      Pull EDAC fixes from Borislav Petkov:
 "Two fixes for use-after-free and memory leaking in the EDAC core, by
  Robert Richter.

  Debug options like DEBUG_TEST_DRIVER_REMOVE, KASAN and DEBUG_KMEMLEAK
  unearthed issues with the lifespan of memory allocated by the EDAC
  memory controller descriptor due to misdesigned memory freeing, done
  partially by the EDAC core *and* the driver core, which is problematic
  to say the least.

  These two are minimal fixes to take care of stable - a proper rework
  is following which cleans up that mess properly"

* tag 'edac_urgent_for_5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC/sysfs: Remove csrow objects on errors
  EDAC/mc: Fix use-after-free and memleaks during device removal
      b982df72
    • Linus Torvalds's avatar
      Merge tag 'block-5.6-2020-02-16' of git://git.kernel.dk/linux-block · e29c6a13
      Linus Torvalds authored 
      Pull block fixes from Jens Axboe:
 "Not a lot here, which is great, basically just three small bcache
  fixes from Coly, and four NVMe fixes via Keith"

* tag 'block-5.6-2020-02-16' of git://git.kernel.dk/linux-block:
  nvme: fix the parameter order for nvme_get_log in nvme_get_fw_slot_info
  nvme/pci: move cqe check after device shutdown
  nvme: prevent warning triggered by nvme_stop_keep_alive
  nvme/tcp: fix bug on double requeue when send fails
  bcache: remove macro nr_to_fifo_front()
  bcache: Revert "bcache: shrink btree node cache after bch_btree_check()"
  bcache: ignore pending signals when creating gc and allocator thread
      e29c6a13
    • Linus Torvalds's avatar
      Merge tag 'for-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · 713db356
      Linus Torvalds authored 
      Pull btrfs fixes from David Sterba:
 "Two races fixed, memory leak fix, sysfs directory fixup and two new
  log messages:

   - two fixed race conditions: extent map merging and truncate vs
     fiemap

   - create the right sysfs directory with device information and move
     the individual device dirs under it

   - print messages when the tree-log is replayed at mount time or
     cannot be replayed on remount"

* tag 'for-5.6-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: sysfs, move device id directories to UUID/devinfo
  btrfs: sysfs, add UUID/devinfo kobject
  Btrfs: fix race between shrinking truncate and fiemap
  btrfs: log message when rw remount is attempted with unclean tree-log
  btrfs: print message when tree-log replay starts
  Btrfs: fix race between using extent maps and merging them
  btrfs: ref-verify: fix memory leaks
      713db356
    • Linus Torvalds's avatar
      Merge tag '5.6-rc1-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 · 288b27a0
      Linus Torvalds authored 
      Pull cifs fixes from Steve French:
 "Four small CIFS/SMB3 fixes. One (the EA overflow fix) for stable"

* tag '5.6-rc1-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: make sure we do not overflow the max EA buffer size
  cifs: enable change notification for SMB2.1 dialect
  cifs: Fix mode output in debugging statements
  cifs: fix mount option display for sec=krb5i
      288b27a0
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 8a8b8096
      Linus Torvalds authored 
      Pull ext4 fixes from Ted Ts'o:
 "Miscellaneous ext4 bug fixes (all stable fodder)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: improve explanation of a mount failure caused by a misconfigured kernel
  jbd2: do not clear the BH_Mapped flag when forgetting a metadata buffer
  jbd2: move the clearing of b_modified flag to the journal_unmap_buffer()
  ext4: add cond_resched() to ext4_protect_reserved_inode
  ext4: fix checksum errors with indexed dirs
  ext4: fix support for inode sizes > 1024 bytes
  ext4: simplify checking quota limits in ext4_statfs()
  ext4: don't assume that mmp_nodename/bdevname have NUL
      8a8b8096
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