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  1. Mar 10, 2018
    • Linus Torvalds's avatar
      Merge tag 'docs-4.16-fix' of git://git.lwn.net/linux · ed3c4dff
      Linus Torvalds authored 
      Pull Documentation build fix from Jonathan Corbet:
 "The Sphinx 1.7 release broke the build process for reasons that are
  mostly our fault.

  This is a single fix cherry-picked from docs-next that restores docs
  buildability for all supported Sphinx versions"

* tag 'docs-4.16-fix' of git://git.lwn.net/linux:
  Documentation/sphinx: Fix Directive import error
      ed3c4dff
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · cfc79ae8
      Linus Torvalds authored 
      Merge misc fixes from Andrew Morton:
 "8 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  lib/test_kmod.c: fix limit check on number of test devices created
  selftests/vm/run_vmtests: adjust hugetlb size according to nr_cpus
  mm/page_alloc: fix memmap_init_zone pageblock alignment
  mm/memblock.c: hardcode the end_pfn being -1
  mm/gup.c: teach get_user_pages_unlocked to handle FOLL_NOWAIT
  lib/bug.c: exclude non-BUG/WARN exceptions from report_bug()
  bug: use %pB in BUG and stack protector failure
  hugetlb: fix surplus pages accounting
      cfc79ae8
    • Luis R. Rodriguez's avatar
      lib/test_kmod.c: fix limit check on number of test devices created · ac68b1b3
      Luis R. Rodriguez authored 
      As reported by Dan the parentheses is in the wrong place, and since
unlikely() call returns either 0 or 1 it's never less than zero.  The
second issue is that signed integer overflows like "INT_MAX + 1" are
undefined behavior.

Since num_test_devs represents the number of devices, we want to stop
prior to hitting the max, and not rely on the wrap arround at all.  So
just cap at num_test_devs + 1, prior to assigning a new device.

Link: http://lkml.kernel.org/r/20180224030046.24238-1-mcgrof@kernel.org
Fixes: d9c6a72d

 ("kmod: add test driver to stress test the module loader")
Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarLuis R. Rodriguez <mcgrof@kernel.org>
Acked-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ac68b1b3
    • Li Zhijian's avatar
      selftests/vm/run_vmtests: adjust hugetlb size according to nr_cpus · 0627be7d
      Li Zhijian authored 
      Fix userfaultfd_hugetlb on hosts which have more than 64 cpus.

  ---------------------------
  running userfaultfd_hugetlb
  ---------------------------
  invalid MiB
  Usage: <MiB> <bounces>
  [FAIL]

Via userfaultfd.c we can know, hugetlb_size needs to meet hugetlb_size
>= nr_cpus * hugepage_size.  hugepage_size is often 2M, so when host
cpus > 64, it requires more than 128M.

[zhijianx.li@intel.com: update changelog/comments and variable name]
 Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com
 Link: http://lkml.kernel.org/r/20180303125027.81638-1-zhijianx.li@intel.com
Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com


Signed-off-by: default avatarLi Zhijian <zhijianx.li@intel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: SeongJae Park <sj38.park@gmail.com>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0627be7d
    • Daniel Vacek's avatar
      mm/page_alloc: fix memmap_init_zone pageblock alignment · 864b75f9
      Daniel Vacek authored 
      Commit b92df1de ("mm: page_alloc: skip over regions of invalid pfns
where possible") introduced a bug where move_freepages() triggers a
VM_BUG_ON() on uninitialized page structure due to pageblock alignment.
To fix this, simply align the skipped pfns in memmap_init_zone() the
same way as in move_freepages_block().

Seen in one of the RHEL reports:

  crash> log | grep -e BUG -e RIP -e Call.Trace -e move_freepages_block -e rmqueue -e freelist -A1
  kernel BUG at mm/page_alloc.c:1389!
  invalid opcode: 0000 [#1] SMP
  --
  RIP: 0010:[<ffffffff8118833e>]  [<ffffffff8118833e>] move_freepages+0x15e/0x160
  RSP: 0018:ffff88054d727688  EFLAGS: 00010087
  --
  Call Trace:
   [<ffffffff811883b3>] move_freepages_block+0x73/0x80
   [<ffffffff81189e63>] __rmqueue+0x263/0x460
   [<ffffffff8118c781>] get_page_from_freelist+0x7e1/0x9e0
   [<ffffffff8118caf6>] __alloc_pages_nodemask+0x176/0x420
  --
  RIP  [<ffffffff8118833e>] move_freepages+0x15e/0x160
   RSP <ffff88054d727688>

  crash> page_init_bug -v | grep RAM
  <struct resource 0xffff88067fffd2f8>          1000 -        9bfff	System RAM (620.00 KiB)
  <struct resource 0xffff88067fffd3a0>        100000 -     430bffff	System RAM (  1.05 GiB = 1071.75 MiB = 1097472.00 KiB)
  <struct resource 0xffff88067fffd410>      4b0c8000 -     4bf9cfff	System RAM ( 14.83 MiB = 15188.00 KiB)
  <struct resource 0xffff88067fffd480>      4bfac000 -     646b1fff	System RAM (391.02 MiB = 400408.00 KiB)
  <struct resource 0xffff88067fffd560>      7b788000 -     7b7fffff	System RAM (480.00 KiB)
  <struct resource 0xffff88067fffd640>     100000000 -    67fffffff	System RAM ( 22.00 GiB)

  crash> page_init_bug | head -6
  <struct resource 0xffff88067fffd560>      7b788000 -     7b7fffff	System RAM (480.00 KiB)
  <struct page 0xffffea0001ede200>   1fffff00000000  0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32          4096    1048575
  <struct page 0xffffea0001ede200> 505736 505344 <struct page 0xffffea0001ed8000> 505855 <struct page 0xffffea0001edffc0>
  <struct page 0xffffea0001ed8000>                0  0 <struct pglist_data 0xffff88047ffd9000> 0 <struct zone 0xffff88047ffd9000> DMA               1       4095
  <struct page 0xffffea0001edffc0>   1fffff00000400  0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32          4096    1048575
  BUG, zones differ!

Note that this range follows two not populated sections
68000000-77ffffff in this zone.  7b788000-7b7fffff is the first one
after a gap.  This makes memmap_init_zone() skip all the pfns up to the
beginning of this range.  But this range is not pageblock (2M) aligned.
In fact no range has to be.

  crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b787000 7b788000
        PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
  ffffea0001e00000  78000000                0        0  0 0
  ffffea0001ed7fc0  7b5ff000                0        0  0 0
  ffffea0001ed8000  7b600000                0        0  0 0	<<<<
  ffffea0001ede1c0  7b787000                0        0  0 0
  ffffea0001ede200  7b788000                0        0  1 1fffff00000000

Top part of page flags should contain nodeid and zonenr, which is not
the case for page ffffea0001ed8000 here (<<<<).

  crash> log | grep -o fffea0001ed[^\ ]* | sort -u
  fffea0001ed8000
  fffea0001eded20
  fffea0001edffc0

  crash> bt -r | grep -o fffea0001ed[^\ ]* | sort -u
  fffea0001ed8000
  fffea0001eded00
  fffea0001eded20
  fffea0001edffc0

Initialization of the whole beginning of the section is skipped up to
the start of the range due to the commit b92df1de.  Now any code
calling move_freepages_block() (like reusing the page from a freelist as
in this example) with a page from the beginning of the range will get
the page rounded down to start_page ffffea0001ed8000 and passed to
move_freepages() which crashes on assertion getting wrong zonenr.

  >         VM_BUG_ON(page_zone(start_page) != page_zone(end_page));

Note, page_zone() derives the zone from page flags here.

From similar machine before commit b92df1de:

  crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b7fe000 7b7ff000
        PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
  fffff73941e00000  78000000                0        0  1 1fffff00000000
  fffff73941ed7fc0  7b5ff000                0        0  1 1fffff00000000
  fffff73941ed8000  7b600000                0        0  1 1fffff00000000
  fffff73941edff80  7b7fe000                0        0  1 1fffff00000000
  fffff73941edffc0  7b7ff000 ffff8e67e04d3ae0     ad84  1 1fffff00020068 uptodate,lru,active,mappedtodisk

All the pages since the beginning of the section are initialized.
move_freepages()' not gonna blow up.

The same machine with this fix applied:

  crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b7fe000 7b7ff000
        PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
  ffffea0001e00000  78000000                0        0  0 0
  ffffea0001e00000  7b5ff000                0        0  0 0
  ffffea0001ed8000  7b600000                0        0  1 1fffff00000000
  ffffea0001edff80  7b7fe000                0        0  1 1fffff00000000
  ffffea0001edffc0  7b7ff000 ffff88017fb13720        8  2 1fffff00020068 uptodate,lru,active,mappedtodisk

At least the bare minimum of pages is initialized preventing the crash
as well.

Customers started to report this as soon as 7.4 (where b92df1de was
merged in RHEL) was released.  I remember reports from
September/October-ish times.  It's not easily reproduced and happens on
a handful of machines only.  I guess that's why.  But that does not make
it less serious, I think.

Though there actually is a report here:
  https://bugzilla.kernel.org/show_bug.cgi?id=196443

And there are reports for Fedora from July:
  https://bugzilla.redhat.com/show_bug.cgi?id=1473242
and CentOS:
  https://bugs.centos.org/view.php?id=13964
and we internally track several dozens reports for RHEL bug
  https://bugzilla.redhat.com/show_bug.cgi?id=1525121

Link: http://lkml.kernel.org/r/0485727b2e82da7efbce5f6ba42524b429d0391a.1520011945.git.neelx@redhat.com
Fixes: b92df1de

 ("mm: page_alloc: skip over regions of invalid pfns where possible")
Signed-off-by: default avatarDaniel Vacek <neelx@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
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>
      864b75f9
    • Daniel Vacek's avatar
      mm/memblock.c: hardcode the end_pfn being -1 · 379b03b7
      Daniel Vacek authored 
      This is just a cleanup.  It aids handling the special end case in the
next commit.

[akpm@linux-foundation.org: make it work against current -linus, not against -mm]
[akpm@linux-foundation.org: make it work against current -linus, not against -mm some more]
Link: http://lkml.kernel.org/r/1ca478d4269125a99bcfb1ca04d7b88ac1aee924.1520011944.git.neelx@redhat.com


Signed-off-by: default avatarDaniel Vacek <neelx@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Paul Burton <paul.burton@imgtec.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>
      379b03b7
    • Andrea Arcangeli's avatar
      mm/gup.c: teach get_user_pages_unlocked to handle FOLL_NOWAIT · 96312e61
      Andrea Arcangeli authored 
      KVM is hanging during postcopy live migration with userfaultfd because
get_user_pages_unlocked is not capable to handle FOLL_NOWAIT.

Earlier FOLL_NOWAIT was only ever passed to get_user_pages.

Specifically faultin_page (the callee of get_user_pages_unlocked caller)
doesn't know that if FAULT_FLAG_RETRY_NOWAIT was set in the page fault
flags, when VM_FAULT_RETRY is returned, the mmap_sem wasn't actually
released (even if nonblocking is not NULL).  So it sets *nonblocking to
zero and the caller won't release the mmap_sem thinking it was already
released, but it wasn't because of FOLL_NOWAIT.

Link: http://lkml.kernel.org/r/20180302174343.5421-2-aarcange@redhat.com
Fixes: ce53053c

 ("kvm: switch get_user_page_nowait() to get_user_pages_unlocked()")
Signed-off-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
Reported-by: default avatarDr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: default avatarDr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      96312e61
    • Kees Cook's avatar
      lib/bug.c: exclude non-BUG/WARN exceptions from report_bug() · 1b4cfe3c
      Kees Cook authored 
      Commit b8347c21 ("x86/debug: Handle warnings before the notifier
chain, to fix KGDB crash") changed the ordering of fixups, and did not
take into account the case of x86 processing non-WARN() and non-BUG()
exceptions.  This would lead to output of a false BUG line with no other
information.

In the case of a refcount exception, it would be immediately followed by
the refcount WARN(), producing very strange double-"cut here":

  lkdtm: attempting bad refcount_inc() overflow
  ------------[ cut here ]------------
  Kernel BUG at 0000000065f29de5 [verbose debug info unavailable]
  ------------[ cut here ]------------
  refcount_t overflow at lkdtm_REFCOUNT_INC_OVERFLOW+0x6b/0x90 in cat[3065], uid/euid: 0/0
  WARNING: CPU: 0 PID: 3065 at kernel/panic.c:657 refcount_error_report+0x9a/0xa4
  ...

In the prior ordering, exceptions were searched first:

   do_trap_no_signal(struct task_struct *tsk, int trapnr, char *str,
   ...
                if (fixup_exception(regs, trapnr))
                        return 0;

  -               if (fixup_bug(regs, trapnr))
  -                       return 0;
  -

As a result, fixup_bugs()'s is_valid_bugaddr() didn't take into account
needing to search the exception list first, since that had already
happened.

So, instead of searching the exception list twice (once in
is_valid_bugaddr() and then again in fixup_exception()), just add a
simple sanity check to report_bug() that will immediately bail out if a
BUG() (or WARN()) entry is not found.

Link: http://lkml.kernel.org/r/20180301225934.GA34350@beast
Fixes: b8347c21

 ("x86/debug: Handle warnings before the notifier chain, to fix KGDB crash")
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Weinberger <richard.weinberger@gmail.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>
      1b4cfe3c
    • Kees Cook's avatar
      bug: use %pB in BUG and stack protector failure · 0862ca42
      Kees Cook authored 
      The BUG and stack protector reports were still using a raw %p.  This
changes it to %pB for more meaningful output.

Link: http://lkml.kernel.org/r/20180301225704.GA34198@beast
Fixes: ad67b74d

 ("printk: hash addresses printed with %p")
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Weinberger <richard.weinberger@gmail.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>
      0862ca42
    • Michal Hocko's avatar
      hugetlb: fix surplus pages accounting · 4704dea3
      Michal Hocko authored 
      Dan Rue has noticed that libhugetlbfs test suite fails counter test:

  # mount_point="/mnt/hugetlb/"
  # echo 200 > /proc/sys/vm/nr_hugepages
  # mkdir -p "${mount_point}"
  # mount -t hugetlbfs hugetlbfs "${mount_point}"
  # export LD_LIBRARY_PATH=/root/libhugetlbfs/libhugetlbfs-2.20/obj64
  # /root/libhugetlbfs/libhugetlbfs-2.20/tests/obj64/counters
  Starting testcase "/root/libhugetlbfs/libhugetlbfs-2.20/tests/obj64/counters", pid 3319
  Base pool size: 0
  Clean...
  FAIL    Line 326: Bad HugePages_Total: expected 0, actual 1

The bug was bisected to 0c397dae ("mm, hugetlb: further simplify
hugetlb allocation API").

The reason is that alloc_surplus_huge_page() misaccounts per node
surplus pages.  We should increase surplus_huge_pages_node rather than
nr_huge_pages_node which is already handled by alloc_fresh_huge_page.

Link: http://lkml.kernel.org/r/20180221191439.GM2231@dhcp22.suse.cz
Fixes: 0c397dae

 ("mm, hugetlb: further simplify hugetlb allocation API")
Signed-off-by: default avatarMichal Hocko <mhocko@suse.com>
Reported-by: default avatarDan Rue <dan.rue@linaro.org>
Tested-by: default avatarDan Rue <dan.rue@linaro.org>
Reviewed-by: default avatarMike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4704dea3
    • Linus Torvalds's avatar
      Merge tag 'pci-v4.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · c68a2cf0
      Linus Torvalds authored 
      Pull PCI fixes from Bjorn Helgaas:

 - fix sparc build issue when OF_IRQ not enabled (Guenter Roeck)

 - fix enumeration of devices below switches on DesignWare-based
   controllers (Koen Vandeputte)

* tag 'pci-v4.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: dwc: Fix enumeration end when reaching root subordinate
  PCI: Move of_irq_parse_and_map_pci() declaration under OF_IRQ
      c68a2cf0
    • Linus Torvalds's avatar
      Merge tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux · 99d7d64b
      Linus Torvalds authored 
      Pull fbdev fix from Bartlomiej Zolnierkiewicz:
 "Just a single fix to close a kernel data leak in FBIOGETCMAP_SPARC
  ioctl"

* tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux:
  fbdev: Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper().
      99d7d64b
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-v4.16-rc5' of git://people.freedesktop.org/~airlied/linux · 65307f2e
      Linus Torvalds authored 
      Pull drm fixes from Dave Airlie:
 "There are a small set of sun4i and i915 fixes, and many more amdgpu
  fixes:

  sun4i:
   - divide by zero fix
   - clock and LVDS fixes

  i915:
   - fix for perf
   - race fix

  amdgpu:
   - a bit more than we are normally comfortable with at this point,
     however it does fix a lot of display issues with the new DC code
     which result in black screens in various configurations along with
     some run of the mill gpu configuration fixes.

     I'm happy enough that the fixes are limited to the DC code and
     should fix a bunch of issues on the new raven ridge APUs that we
     are seeing shipped now"

* tag 'drm-fixes-for-v4.16-rc5' of git://people.freedesktop.org/~airlied/linux: (42 commits)
  drm/amd/display: validate plane format on primary plane
  drm/amdgpu:Always save uvd vcpu_bo in VM Mode
  drm/amdgpu:Correct max uvd handles
  drm/amd/display: early return if not in vga mode in disable_vga
  drm/amd/display: Fix takover from VGA mode
  drm/amd/display: Fix memleaks when atomic check fails.
  drm/amd/display: Return success when enabling interrupt
  drm/amd/display: Use crtc enable/disable_vblank hooks
  drm/amd/display: update infoframe after dig fe is turned on
  drm/amd/display: fix boot-up on vega10
  drm/amd/display: fix cursor related Pstate hang
  drm/amd/display: Set irq state only on existing crtcs
  drm/amd/display: Fixed non-native modes not lighting up
  drm/amd/display: Call update_stream_signal directly from amdgpu_dm
  drm/amd/display: Make create_stream_for_sink more consistent
  drm/amd/display: Don't block dual-link DVI modes
  drm/amd/display: Don't allow dual-link DVI on all ASICs.
  drm/amd/display: Pass signal directly to enable_tmds_output
  drm/amd/display: Remove unnecessary fail labels in create_stream_for_sink
  drm/amd/display: Move MAX_TMDS_CLOCK define to header
  ...
      65307f2e
    • Linus Torvalds's avatar
      Merge tag 'sound-4.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · dfbab3fa
      Linus Torvalds authored 
      Pull sound fixes from Takashi Iwai:
 "Two type of fixes:

   - The usual stuff, a handful HD-audio quirks for various machines

   - Further hardening against ALSA sequencer ioctl/write races that are
     triggered by fuzzer"

* tag 'sound-4.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda: add dock and led support for HP ProBook 640 G2
  ALSA: hda: add dock and led support for HP EliteBook 820 G3
  ALSA: hda/realtek - Make dock sound work on ThinkPad L570
  ALSA: seq: Remove superfluous snd_seq_queue_client_leave_cells() call
  ALSA: seq: More protection for concurrent write and ioctl races
  ALSA: seq: Don't allow resizing pool in use
  ALSA: hda/realtek - Fix dock line-out volume on Dell Precision 7520
  ALSA: hda/realtek: Limit mic boost on T480
  ALSA: hda/realtek - Add headset mode support for Dell laptop
  ALSA: hda/realtek - Add support headset mode for DELL WYSE
  ALSA: hda - Fix a wrong FIXUP for alc289 on Dell machines
      dfbab3fa
    • Matthew Wilcox's avatar
      Documentation/sphinx: Fix Directive import error · ff690eee
      Matthew Wilcox authored 
      Sphinx 1.7 removed sphinx.util.compat.Directive so people
who have upgraded cannot build the documentation.  Switch to
docutils.parsers.rst.Directive which has been available since
docutils 0.5 released in 2009.

Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=1083694


Co-developed-by: default avatarTakashi Iwai <tiwai@suse.de>
Acked-by: default avatarJani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarMatthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
      ff690eee
    • Linus Torvalds's avatar
      Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs · 719ea861
      Linus Torvalds authored 
      Pull overlayfs fixes from Miklos Szeredi:
 "This fixes a corner case for NFS exporting (introduced in this cycle)
  as well as fixing miscellaneous bugs"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: update Kconfig texts
  ovl: redirect_dir=nofollow should not follow redirect for opaque lower
  ovl: fix ptr_ret.cocci warnings
  ovl: check ERR_PTR() return value from ovl_lookup_real()
  ovl: check lower ancestry on encode of lower dir file handle
  ovl: hash non-dir by lower inode for fsnotify
      719ea861
    • Linus Torvalds's avatar
      Merge tag 'xfs-4.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · 2d9b1d69
      Linus Torvalds authored 
      Pull xfs fixes from Darrick Wong:

 - Fix some iomap locking problems

 - Don't allocate cow blocks when we're zeroing file data

* tag 'xfs-4.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: don't block on the ilock for RWF_NOWAIT
  xfs: don't start out with the exclusive ilock for direct I/O
  xfs: don't allocate COW blocks for zeroing holes or unwritten extents
      2d9b1d69
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a525df05
      Linus Torvalds authored 
      Pull powerpc fixes from Michael Ellerman:
 "One notable fix to properly advertise our support for a new firmware
  feature, caused by two series conflicting semantically but not
  textually.

  There's a new ioctl for the new ocxl driver, which is not a fix, but
  needed to complete the userspace API and good to have before the
  driver is in a released kernel.

  Finally three minor selftest fixes, and a fix for intermittent build
  failures for some obscure platforms, caused by a missing make
  dependency.

  Thanks to: Alastair D'Silva, Bharata B Rao, Guenter Roeck"

* tag 'powerpc-4.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pseries: Fix vector5 in ibm architecture vector table
  ocxl: Document the OCXL_IOCTL_GET_METADATA IOCTL
  ocxl: Add get_metadata IOCTL to share OCXL information to userspace
  selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable
  selftests/powerpc: Fix missing clean of pmu/lib.o
  powerpc/boot: Fix random libfdt related build errors
  selftests/powerpc: Skip tm-trap if transactional memory is not enabled
      a525df05
  3. Mar 09, 2018
  5. Mar 08, 2018