sfrench/cifs-2.6.git
2 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sun, 18 Nov 2018 19:31:26 +0000 (11:31 -0800)]
Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "16 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm/memblock.c: fix a typo in __next_mem_pfn_range() comments
  mm, page_alloc: check for max order in hot path
  scripts/spdxcheck.py: make python3 compliant
  tmpfs: make lseek(SEEK_DATA/SEK_HOLE) return ENXIO with a negative offset
  lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
  mm/vmstat.c: fix NUMA statistics updates
  mm/gup.c: fix follow_page_mask() kerneldoc comment
  ocfs2: free up write context when direct IO failed
  scripts/faddr2line: fix location of start_kernel in comment
  mm: don't reclaim inodes with many attached pages
  mm, memory_hotplug: check zone_movable in has_unmovable_pages
  mm/swapfile.c: use kvzalloc for swap_info_struct allocation
  MAINTAINERS: update OMAP MMC entry
  hugetlbfs: fix kernel BUG at fs/hugetlbfs/inode.c:444!
  kernel/sched/psi.c: simplify cgroup_move_task()
  z3fold: fix possible reclaim races

2 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 18 Nov 2018 18:58:20 +0000 (10:58 -0800)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "Fix an exec() related scalability/performance regression, which was
  caused by incorrectly calculating load and migrating tasks on exec()
  when they shouldn't be"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix cpu_util_wake() for 'execl' type workloads

2 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 18 Nov 2018 18:54:59 +0000 (10:54 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "Fix uncore PMU enumeration for CofeeLake CPUs"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel/uncore: Support CoffeeLake 8th CBOX
  perf/x86/intel/uncore: Add more IMC PCI IDs for KabyLake and CoffeeLake CPUs

2 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 18 Nov 2018 18:52:26 +0000 (10:52 -0800)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "Misc fixes: two warning splat fixes, a leak fix and persistent memory
  allocation fixes for ARM"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: Permit calling efi_mem_reserve_persistent() from atomic context
  efi/arm: Defer persistent reservations until after paging_init()
  efi/arm/libstub: Pack FDT after populating it
  efi/arm: Revert deferred unmap of early memmap mapping
  efi: Fix debugobjects warning on 'efi_rts_work'

2 years agoMerge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 18 Nov 2018 18:45:09 +0000 (10:45 -0800)]
Merge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM spectre updates from Russell King:
 "These are the currently known final bits that resolve the Spectre
  issues. big.Little systems used to be sufficiently identical in that
  there were no differences between individual CPUs in the system that
  mattered to the kernel. With the advent of the Spectre problem, the
  CPUs now have differences in how the workaround is applied.

  As a result of previous Spectre patches, these systems ended up
  reporting quite a lot of:

     "CPUx: Spectre v2: incorrect context switching function, system vulnerable"

  messages due to the action of the big.Little switcher causing the CPUs
  to be re-initialised regularly. This series resolves that issue by
  making the CPU vtable unique to each CPU.

  However, since this is used very early, before per-cpu is setup,
  per-cpu can't be used. We also have a problem that two of the methods
  are not called from preempt-safe paths, but thankfully these remain
  identical between all CPUs in the system. To make sure, we validate
  that these are identical during boot"

* 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: spectre-v2: per-CPU vtables to work around big.Little systems
  ARM: add PROC_VTABLE and PROC_TABLE macros
  ARM: clean up per-processor check_bugs method call
  ARM: split out processor lookup
  ARM: make lookup_processor_type() non-__init

2 years agomm/memblock.c: fix a typo in __next_mem_pfn_range() comments
Chen Chang [Fri, 16 Nov 2018 23:08:57 +0000 (15:08 -0800)]
mm/memblock.c: fix a typo in __next_mem_pfn_range() comments

Link: http://lkml.kernel.org/r/20181107100247.13359-1-rainccrun@gmail.com
Signed-off-by: Chen Chang <rainccrun@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm, page_alloc: check for max order in hot path
Michal Hocko [Fri, 16 Nov 2018 23:08:53 +0000 (15:08 -0800)]
mm, page_alloc: check for max order in hot path

Konstantin has noticed that kvmalloc might trigger the following
warning:

  WARNING: CPU: 0 PID: 6676 at mm/vmstat.c:986 __fragmentation_index+0x54/0x60
  [...]
  Call Trace:
   fragmentation_index+0x76/0x90
   compaction_suitable+0x4f/0xf0
   shrink_node+0x295/0x310
   node_reclaim+0x205/0x250
   get_page_from_freelist+0x649/0xad0
   __alloc_pages_nodemask+0x12a/0x2a0
   kmalloc_large_node+0x47/0x90
   __kmalloc_node+0x22b/0x2e0
   kvmalloc_node+0x3e/0x70
   xt_alloc_table_info+0x3a/0x80 [x_tables]
   do_ip6t_set_ctl+0xcd/0x1c0 [ip6_tables]
   nf_setsockopt+0x44/0x60
   SyS_setsockopt+0x6f/0xc0
   do_syscall_64+0x67/0x120
   entry_SYSCALL_64_after_hwframe+0x3d/0xa2

the problem is that we only check for an out of bound order in the slow
path and the node reclaim might happen from the fast path already.  This
is fixable by making sure that kvmalloc doesn't ever use kmalloc for
requests that are larger than KMALLOC_MAX_SIZE but this also shows that
the code is rather fragile.  A recent UBSAN report just underlines that
by the following report

  UBSAN: Undefined behaviour in mm/page_alloc.c:3117:19
  shift exponent 51 is too large for 32-bit type 'int'
  CPU: 0 PID: 6520 Comm: syz-executor1 Not tainted 4.19.0-rc2 #1
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  Call Trace:
   __dump_stack lib/dump_stack.c:77 [inline]
   dump_stack+0xd2/0x148 lib/dump_stack.c:113
   ubsan_epilogue+0x12/0x94 lib/ubsan.c:159
   __ubsan_handle_shift_out_of_bounds+0x2b6/0x30b lib/ubsan.c:425
   __zone_watermark_ok+0x2c7/0x400 mm/page_alloc.c:3117
   zone_watermark_fast mm/page_alloc.c:3216 [inline]
   get_page_from_freelist+0xc49/0x44c0 mm/page_alloc.c:3300
   __alloc_pages_nodemask+0x21e/0x640 mm/page_alloc.c:4370
   alloc_pages_current+0xcc/0x210 mm/mempolicy.c:2093
   alloc_pages include/linux/gfp.h:509 [inline]
   __get_free_pages+0x12/0x60 mm/page_alloc.c:4414
   dma_mem_alloc+0x36/0x50 arch/x86/include/asm/floppy.h:156
   raw_cmd_copyin drivers/block/floppy.c:3159 [inline]
   raw_cmd_ioctl drivers/block/floppy.c:3206 [inline]
   fd_locked_ioctl+0xa00/0x2c10 drivers/block/floppy.c:3544
   fd_ioctl+0x40/0x60 drivers/block/floppy.c:3571
   __blkdev_driver_ioctl block/ioctl.c:303 [inline]
   blkdev_ioctl+0xb3c/0x1a30 block/ioctl.c:601
   block_ioctl+0x105/0x150 fs/block_dev.c:1883
   vfs_ioctl fs/ioctl.c:46 [inline]
   do_vfs_ioctl+0x1c0/0x1150 fs/ioctl.c:687
   ksys_ioctl+0x9e/0xb0 fs/ioctl.c:702
   __do_sys_ioctl fs/ioctl.c:709 [inline]
   __se_sys_ioctl fs/ioctl.c:707 [inline]
   __x64_sys_ioctl+0x7e/0xc0 fs/ioctl.c:707
   do_syscall_64+0xc4/0x510 arch/x86/entry/common.c:290
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

Note that this is not a kvmalloc path.  It is just that the fast path
really depends on having sanitzed order as well.  Therefore move the
order check to the fast path.

Link: http://lkml.kernel.org/r/20181113094305.GM15120@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reported-by: Kyungtae Kim <kt0755@gmail.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pavel Tatashin <pavel.tatashin@microsoft.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Aaron Lu <aaron.lu@intel.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Byoungyoung Lee <lifeasageek@gmail.com>
Cc: "Dae R. Jeong" <threeearcat@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoscripts/spdxcheck.py: make python3 compliant
Uwe Kleine-König [Fri, 16 Nov 2018 23:08:43 +0000 (15:08 -0800)]
scripts/spdxcheck.py: make python3 compliant

Without this change the following happens when using Python3 (3.6.6):

$ echo "GPL-2.0" | python3 scripts/spdxcheck.py -
FAIL: 'str' object has no attribute 'decode'
Traceback (most recent call last):
  File "scripts/spdxcheck.py", line 253, in <module>
    parser.parse_lines(sys.stdin, args.maxlines, '-')
  File "scripts/spdxcheck.py", line 171, in parse_lines
    line = line.decode(locale.getpreferredencoding(False), errors='ignore')
AttributeError: 'str' object has no attribute 'decode'

So as the line is already a string, there is no need to decode it and
the line can be dropped.

/usr/bin/python on Arch is Python 3.  So this would indeed be worth
going into 4.19.

Link: http://lkml.kernel.org/r/20181023070802.22558-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Joe Perches <joe@perches.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agotmpfs: make lseek(SEEK_DATA/SEK_HOLE) return ENXIO with a negative offset
Yufen Yu [Fri, 16 Nov 2018 23:08:39 +0000 (15:08 -0800)]
tmpfs: make lseek(SEEK_DATA/SEK_HOLE) return ENXIO with a negative offset

Other filesystems such as ext4, f2fs and ubifs all return ENXIO when
lseek (SEEK_DATA or SEEK_HOLE) requests a negative offset.

man 2 lseek says

:      EINVAL whence  is  not  valid.   Or: the resulting file offset would be
:             negative, or beyond the end of a seekable device.
:
:      ENXIO  whence is SEEK_DATA or SEEK_HOLE, and the file offset is  beyond
:             the end of the file.

Make tmpfs return ENXIO under these circumstances as well.  After this,
tmpfs also passes xfstests's generic/448.

[akpm@linux-foundation.org: rewrite changelog]
Link: http://lkml.kernel.org/r/1540434176-14349-1-git-send-email-yuyufen@huawei.com
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agolib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
Arnd Bergmann [Fri, 16 Nov 2018 23:08:35 +0000 (15:08 -0800)]
lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn

gcc-8 complains about the prototype for this function:

  lib/ubsan.c:432:1: error: ignoring attribute 'noreturn' in declaration of a built-in function '__ubsan_handle_builtin_unreachable' because it conflicts with attribute 'const' [-Werror=attributes]

This is actually a GCC's bug. In GCC internals
__ubsan_handle_builtin_unreachable() declared with both 'noreturn' and
'const' attributes instead of only 'noreturn':

   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84210

Workaround this by removing the noreturn attribute.

[aryabinin: add information about GCC bug in changelog]
Link: http://lkml.kernel.org/r/20181107144516.4587-1-aryabinin@virtuozzo.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Olof Johansson <olof@lixom.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm/vmstat.c: fix NUMA statistics updates
Janne Huttunen [Fri, 16 Nov 2018 23:08:32 +0000 (15:08 -0800)]
mm/vmstat.c: fix NUMA statistics updates

Scan through the whole array to see if an update is needed.  While we're
at it, use sizeof() to be safe against any possible type changes in the
future.

The bug here is that we wouldn't sync per-cpu counters into global ones
if there was an update of numa_stats for higher cpus.  Highly
theoretical one though because it is much more probable that zone_stats
are updated so we would refresh anyway.  So I wouldn't bother to mark
this for stable, yet something nice to fix.

[mhocko@suse.com: changelog enhancement]
Link: http://lkml.kernel.org/r/1541601517-17282-1-git-send-email-janne.huttunen@nokia.com
Fixes: 1d90ca897cb0 ("mm: update NUMA counter threshold size")
Signed-off-by: Janne Huttunen <janne.huttunen@nokia.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm/gup.c: fix follow_page_mask() kerneldoc comment
Mike Rapoport [Fri, 16 Nov 2018 23:08:29 +0000 (15:08 -0800)]
mm/gup.c: fix follow_page_mask() kerneldoc comment

Commit df06b37ffe5a ("mm/gup: cache dev_pagemap while pinning pages")
modified the signature of follow_page_mask() but left the parameter
description behind.

Update the description to make the code and comments agree again.

While at it, update formatting of the return value description to match
Documentation/doc-guide/kernel-doc.rst guidelines.

Link: http://lkml.kernel.org/r/1541603316-27832-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoocfs2: free up write context when direct IO failed
Wengang Wang [Fri, 16 Nov 2018 23:08:25 +0000 (15:08 -0800)]
ocfs2: free up write context when direct IO failed

The write context should also be freed even when direct IO failed.
Otherwise a memory leak is introduced and entries remain in
oi->ip_unwritten_list causing the following BUG later in unlink path:

  ERROR: bug expression: !list_empty(&oi->ip_unwritten_list)
  ERROR: Clear inode of 215043, inode has unwritten extents
  ...
  Call Trace:
  ? __set_current_blocked+0x42/0x68
  ocfs2_evict_inode+0x91/0x6a0 [ocfs2]
  ? bit_waitqueue+0x40/0x33
  evict+0xdb/0x1af
  iput+0x1a2/0x1f7
  do_unlinkat+0x194/0x28f
  SyS_unlinkat+0x1b/0x2f
  do_syscall_64+0x79/0x1ae
  entry_SYSCALL_64_after_hwframe+0x151/0x0

This patch also logs, with frequency limit, direct IO failures.

Link: http://lkml.kernel.org/r/20181102170632.25921-1-wen.gang.wang@oracle.com
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Changwei Ge <ge.changwei@h3c.com>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoscripts/faddr2line: fix location of start_kernel in comment
Randy Dunlap [Fri, 16 Nov 2018 23:08:22 +0000 (15:08 -0800)]
scripts/faddr2line: fix location of start_kernel in comment

Fix a source file reference location to the correct path name.

Link: http://lkml.kernel.org/r/1d50bd3d-178e-dcd8-779f-9711887440eb@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm: don't reclaim inodes with many attached pages
Roman Gushchin [Fri, 16 Nov 2018 23:08:18 +0000 (15:08 -0800)]
mm: don't reclaim inodes with many attached pages

Spock reported that commit 172b06c32b94 ("mm: slowly shrink slabs with a
relatively small number of objects") leads to a regression on his setup:
periodically the majority of the pagecache is evicted without an obvious
reason, while before the change the amount of free memory was balancing
around the watermark.

The reason behind is that the mentioned above change created some
minimal background pressure on the inode cache.  The problem is that if
an inode is considered to be reclaimed, all belonging pagecache page are
stripped, no matter how many of them are there.  So, if a huge
multi-gigabyte file is cached in the memory, and the goal is to reclaim
only few slab objects (unused inodes), we still can eventually evict all
gigabytes of the pagecache at once.

The workload described by Spock has few large non-mapped files in the
pagecache, so it's especially noticeable.

To solve the problem let's postpone the reclaim of inodes, which have
more than 1 attached page.  Let's wait until the pagecache pages will be
evicted naturally by scanning the corresponding LRU lists, and only then
reclaim the inode structure.

Link: http://lkml.kernel.org/r/20181023164302.20436-1-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reported-by: Spock <dairinin@gmail.com>
Tested-by: Spock <dairinin@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: <stable@vger.kernel.org> [4.19.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm, memory_hotplug: check zone_movable in has_unmovable_pages
Michal Hocko [Fri, 16 Nov 2018 23:08:15 +0000 (15:08 -0800)]
mm, memory_hotplug: check zone_movable in has_unmovable_pages

Page state checks are racy.  Under a heavy memory workload (e.g.  stress
-m 200 -t 2h) it is quite easy to hit a race window when the page is
allocated but its state is not fully populated yet.  A debugging patch to
dump the struct page state shows

  has_unmovable_pages: pfn:0x10dfec00, found:0x1, count:0x0
  page:ffffea0437fb0000 count:1 mapcount:1 mapping:ffff880e05239841 index:0x7f26e5000 compound_mapcount: 1
  flags: 0x5fffffc0090034(uptodate|lru|active|head|swapbacked)

Note that the state has been checked for both PageLRU and PageSwapBacked
already.  Closing this race completely would require some sort of retry
logic.  This can be tricky and error prone (think of potential endless
or long taking loops).

Workaround this problem for movable zones at least.  Such a zone should
only contain movable pages.  Commit 15c30bc09085 ("mm, memory_hotplug:
make has_unmovable_pages more robust") has told us that this is not
strictly true though.  Bootmem pages should be marked reserved though so
we can move the original check after the PageReserved check.  Pages from
other zones are still prone to races but we even do not pretend that
memory hotremove works for those so pre-mature failure doesn't hurt that
much.

Link: http://lkml.kernel.org/r/20181106095524.14629-1-mhocko@kernel.org
Fixes: 15c30bc09085 ("mm, memory_hotplug: make has_unmovable_pages more robust")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Baoquan He <bhe@redhat.com>
Tested-by: Baoquan He <bhe@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agomm/swapfile.c: use kvzalloc for swap_info_struct allocation
Vasily Averin [Fri, 16 Nov 2018 23:08:11 +0000 (15:08 -0800)]
mm/swapfile.c: use kvzalloc for swap_info_struct allocation

Commit a2468cc9bfdf ("swap: choose swap device according to numa node")
changed 'avail_lists' field of 'struct swap_info_struct' to an array.
In popular linux distros it increased size of swap_info_struct up to 40
Kbytes and now swap_info_struct allocation requires order-4 page.
Switch to kvzmalloc allows to avoid unexpected allocation failures.

Link: http://lkml.kernel.org/r/fc23172d-3c75-21e2-d551-8b1808cbe593@virtuozzo.com
Fixes: a2468cc9bfdf ("swap: choose swap device according to numa node")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMAINTAINERS: update OMAP MMC entry
Aaro Koskinen [Fri, 16 Nov 2018 23:08:08 +0000 (15:08 -0800)]
MAINTAINERS: update OMAP MMC entry

Jarkko's e-mail address hasn't worked for a long time.  We still want to
keep this driver working as it is critical for some of the OMAP boards.
I use and test this driver frequently, so change myself as a maintainer
with "Odd Fixes" status.

Link: http://lkml.kernel.org/r/20181106222750.12939-1-aaro.koskinen@iki.fi
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agohugetlbfs: fix kernel BUG at fs/hugetlbfs/inode.c:444!
Mike Kravetz [Fri, 16 Nov 2018 23:08:04 +0000 (15:08 -0800)]
hugetlbfs: fix kernel BUG at fs/hugetlbfs/inode.c:444!

This bug has been experienced several times by the Oracle DB team.  The
BUG is in remove_inode_hugepages() as follows:

/*
 * If page is mapped, it was faulted in after being
 * unmapped in caller.  Unmap (again) now after taking
 * the fault mutex.  The mutex will prevent faults
 * until we finish removing the page.
 *
 * This race can only happen in the hole punch case.
 * Getting here in a truncate operation is a bug.
 */
if (unlikely(page_mapped(page))) {
BUG_ON(truncate_op);

In this case, the elevated map count is not the result of a race.
Rather it was incorrectly incremented as the result of a bug in the huge
pmd sharing code.  Consider the following:

 - Process A maps a hugetlbfs file of sufficient size and alignment
   (PUD_SIZE) that a pmd page could be shared.

 - Process B maps the same hugetlbfs file with the same size and
   alignment such that a pmd page is shared.

 - Process B then calls mprotect() to change protections for the mapping
   with the shared pmd. As a result, the pmd is 'unshared'.

 - Process B then calls mprotect() again to chage protections for the
   mapping back to their original value. pmd remains unshared.

 - Process B then forks and process C is created. During the fork
   process, we do dup_mm -> dup_mmap -> copy_page_range to copy page
   tables. Copying page tables for hugetlb mappings is done in the
   routine copy_hugetlb_page_range.

In copy_hugetlb_page_range(), the destination pte is obtained by:

dst_pte = huge_pte_alloc(dst, addr, sz);

If pmd sharing is possible, the returned pointer will be to a pte in an
existing page table.  In the situation above, process C could share with
either process A or process B.  Since process A is first in the list,
the returned pte is a pointer to a pte in process A's page table.

However, the check for pmd sharing in copy_hugetlb_page_range is:

/* If the pagetables are shared don't copy or take references */
if (dst_pte == src_pte)
continue;

Since process C is sharing with process A instead of process B, the
above test fails.  The code in copy_hugetlb_page_range which follows
assumes dst_pte points to a huge_pte_none pte.  It copies the pte entry
from src_pte to dst_pte and increments this map count of the associated
page.  This is how we end up with an elevated map count.

To solve, check the dst_pte entry for huge_pte_none.  If !none, this
implies PMD sharing so do not copy.

Link: http://lkml.kernel.org/r/20181105212315.14125-1-mike.kravetz@oracle.com
Fixes: c5c99429fa57 ("fix hugepages leak due to pagetable page sharing")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Prakash Sangappa <prakash.sangappa@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agokernel/sched/psi.c: simplify cgroup_move_task()
Olof Johansson [Fri, 16 Nov 2018 23:08:00 +0000 (15:08 -0800)]
kernel/sched/psi.c: simplify cgroup_move_task()

The existing code triggered an invalid warning about 'rq' possibly being
used uninitialized.  Instead of doing the silly warning suppression by
initializa it to NULL, refactor the code to bail out early instead.

Warning was:

  kernel/sched/psi.c: In function `cgroup_move_task':
  kernel/sched/psi.c:639:13: warning: `rq' may be used uninitialized in this function [-Wmaybe-uninitialized]

Link: http://lkml.kernel.org/r/20181103183339.8669-1-olof@lixom.net
Fixes: 2ce7135adc9ad ("psi: cgroup support")
Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoz3fold: fix possible reclaim races
Vitaly Wool [Fri, 16 Nov 2018 23:07:56 +0000 (15:07 -0800)]
z3fold: fix possible reclaim races

Reclaim and free can race on an object which is basically fine but in
order for reclaim to be able to map "freed" object we need to encode
object length in the handle.  handle_to_chunks() is then introduced to
extract object length from a handle and use it during mapping.

Moreover, to avoid racing on a z3fold "headless" page release, we should
not try to free that page in z3fold_free() if the reclaim bit is set.
Also, in the unlikely case of trying to reclaim a page being freed, we
should not proceed with that page.

While at it, fix the page accounting in reclaim function.

This patch supersedes "[PATCH] z3fold: fix reclaim lock-ups".

Link: http://lkml.kernel.org/r/20181105162225.74e8837d03583a9b707cf559@gmail.com
Signed-off-by: Vitaly Wool <vitaly.vul@sony.com>
Signed-off-by: Jongseok Kim <ks77sj@gmail.com>
Reported-by-by: Jongseok Kim <ks77sj@gmail.com>
Reviewed-by: Snild Dolkow <snild@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge tag 'fsnotify_for_v4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 16 Nov 2018 19:18:36 +0000 (13:18 -0600)]
Merge tag 'fsnotify_for_v4.20-rc3' of git://git./linux/kernel/git/jack/linux-fs

Pull fsnotify fix from Jan Kara:
 "One small fsnotify fix for duplicate events"

* tag 'fsnotify_for_v4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fanotify: fix handling of events on child sub-directory

2 years agoMerge tag 'gfs2-4.20.fixes3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2...
Linus Torvalds [Fri, 16 Nov 2018 17:38:14 +0000 (11:38 -0600)]
Merge tag 'gfs2-4.20.fixes3' of git://git./linux/kernel/git/gfs2/linux-gfs2

Pull bfs2 fixes from Andreas Gruenbacher:
 "Fix two bugs leading to leaked buffer head references:

   - gfs2: Put bitmap buffers in put_super
   - gfs2: Fix iomap buffer head reference counting bug

  And one bug leading to significant slow-downs when deleting large
  files:

   - gfs2: Fix metadata read-ahead during truncate (2)"

* tag 'gfs2-4.20.fixes3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Fix iomap buffer head reference counting bug
  gfs2: Fix metadata read-ahead during truncate (2)
  gfs2: Put bitmap buffers in put_super

2 years agogfs2: Fix iomap buffer head reference counting bug
Andreas Gruenbacher [Sun, 11 Nov 2018 11:15:21 +0000 (11:15 +0000)]
gfs2: Fix iomap buffer head reference counting bug

GFS2 passes the inode buffer head (dibh) from gfs2_iomap_begin to
gfs2_iomap_end in iomap->private.  It sets that private pointer in
gfs2_iomap_get.  Users of gfs2_iomap_get other than gfs2_iomap_begin
would have to release iomap->private, but this isn't done correctly,
leading to a leak of buffer head references.

To fix this, move the code for setting iomap->private from
gfs2_iomap_get to gfs2_iomap_begin.

Fixes: 64bc06bb32 ("gfs2: iomap buffered write support")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Fri, 16 Nov 2018 16:37:27 +0000 (10:37 -0600)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This fixes the following issues:

   - Potential memory overwrite in simd

   - Kernel info leaks in crypto_user

   - NULL dereference and use-after-free in hisilicon"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: user - Zeroize whole structure given to user space
  crypto: user - fix leaking uninitialized memory to userspace
  crypto: simd - correctly take reqsize of wrapped skcipher into account
  crypto: hisilicon - Fix reference after free of memories on error path
  crypto: hisilicon - Fix NULL dereference for same dst and src

2 years agoMerge tag 'drm-fixes-2018-11-16' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 16 Nov 2018 16:17:29 +0000 (10:17 -0600)]
Merge tag 'drm-fixes-2018-11-16' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Live from Vancouver, SoC maintainer talk, this weeks drm fixes pull
  for rc3:

  omapdrm:
   - regression fixes for the reordering bridge stuff that went into rc1

  i915:
   - incorrect EU count fix
   - HPD storm fix
   - MST fix
   - relocation fix for gen4/5

  amdgpu:
   - huge page handling fix
   - IH ring setup
   - XGMI aperture setup
   - watermark setup fix

  misc:
   - docs and MST fix"

* tag 'drm-fixes-2018-11-16' of git://anongit.freedesktop.org/drm/drm: (23 commits)
  drm/i915: Account for scale factor when calculating initial phase
  drm/i915: Clean up skl_program_scaler()
  drm/i915: Move programming plane scaler to its own function.
  drm/i915/icl: Drop spurious register read from icl_dbuf_slices_update
  drm/i915: fix broadwell EU computation
  drm/amdgpu: fix huge page handling on Vega10
  drm/amd/pp: Fix truncated clock value when set watermark
  drm/amdgpu: fix bug with IH ring setup
  drm/meson: venc: dmt mode must use encp
  drm/amdgpu: set system aperture to cover whole FB region
  drm/i915: Fix hpd handling for pins with two encoders
  drm/i915/execlists: Force write serialisation into context image vs execution
  drm/i915/icl: Fix power well 2 wrt. DC-off toggling order
  drm/i915: Fix NULL deref when re-enabling HPD IRQs on systems with MST
  drm/i915: Fix possible race in intel_dp_add_mst_connector()
  drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5
  drm/omap: dsi: Fix missing of_platform_depopulate()
  drm/omap: Move DISPC runtime PM handling to omapdrm
  drm/omap: dsi: Ensure the device is active during probe
  drm/omap: hdmi4: Ensure the device is active during bind
  ...

2 years agoMerge tag 'powerpc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 16 Nov 2018 16:14:54 +0000 (10:14 -0600)]
Merge tag 'powerpc-4.20-3' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Two weeks worth of fixes since rc1.

   - I broke 16-byte alignment of the stack when we moved PPR into
     pt_regs. Despite being required by the ABI this broke almost
     nothing, we eventually hit it in code where GCC does arithmetic on
     the stack pointer assuming the bottom 4 bits are clear. Fix it by
     padding the in-kernel pt_regs by 8 bytes.

   - A couple of commits fixing minor bugs in the recent SLB rewrite.

   - A build fix related to tracepoints in KVM in some configurations.

   - Our old "IO workarounds" code written for Cell couldn't coexist in
     a kernel that runs on Power9 with the Radix MMU, fix that.

   - Remove the NPU DMA ops, these just printed a warning and should
     never have been called.

   - Suppress an overly chatty message triggered by CPU hotplug in some
     configs.

   - Two small selftest fixes.

  Thanks to: Alistair Popple, Gustavo Romero, Nicholas Piggin, Satheesh
  Rajendran, Scott Wood"

* tag 'powerpc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  selftests/powerpc: Adjust wild_bctr to build with old binutils
  powerpc/64: Fix kernel stack 16-byte alignment
  powerpc/numa: Suppress "VPHN is not supported" messages
  selftests/powerpc: Fix wild_bctr test to work on ppc64
  powerpc/io: Fix the IO workarounds code to work with Radix
  powerpc/mm/64s: Fix preempt warning in slb_allocate_kernel()
  KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE
  powerpc/mm/64s: Only use slbfee on CPUs that support it
  powerpc/mm/64s: Use PPC_SLBFEE macro
  powerpc/mm/64s: Consolidate SLB assertions
  powerpc/powernv/npu: Remove NPU DMA ops

2 years agoMerge tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensa
Linus Torvalds [Fri, 16 Nov 2018 16:10:27 +0000 (10:10 -0600)]
Merge tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensa

Pull Xtensa fixes from Max Filippov:

 - fix stack alignment for bFLT binaries.

 - fix physical-to-virtual address translation for boot parameters in
   MMUv3 256+256 and 512+512 virtual memory layouts.

* tag 'xtensa-20181115' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: fix boot parameters address translation
  xtensa: make sure bFLT stack is 16 byte aligned

2 years agoMerge tag 'for-linus-20181115' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 16 Nov 2018 15:31:59 +0000 (09:31 -0600)]
Merge tag 'for-linus-20181115' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Discard loop fix, caused by integer overflow (Dave)

 - Blacklist of Samsung drive that hangs with power management (Diego)

 - Copy bio priority when cloning it (Hannes)

 - Fix race condition exposed in floppy (me)

 - Fix SCSI queue cleanup regression. While elusive, it caused oopses in
   queue running (Ming)

 - Fix bad string copy in kyber tracing (Omar)

* tag 'for-linus-20181115' of git://git.kernel.dk/linux-block:
  SCSI: fix queue cleanup race before queue initialization is done
  block: fix 32 bit overflow in __blkdev_issue_discard()
  libata: blacklist SAMSUNG MZ7TD256HAFV-000L9 SSD
  block: copy ioprio in __bio_clone_fast() and bounce
  kyber: fix wrong strlcpy() size in trace_kyber_latency()
  floppy: fix race condition in __floppy_read_block_0()

2 years agoMerge tag 'fuse-fixes-4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 16 Nov 2018 15:30:13 +0000 (09:30 -0600)]
Merge tag 'fuse-fixes-4.20-rc3' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse fixes from Miklos Szeredi:
 "A couple of fixes, all bound for -stable (i.e. not regressions in this
  cycle)"

* tag 'fuse-fixes-4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix use-after-free in fuse_direct_IO()
  fuse: fix possibly missed wake-up after abort
  fuse: fix leaked notify reply

2 years agoMerge tag 'drm-intel-fixes-2018-11-15' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Thu, 15 Nov 2018 22:52:14 +0000 (08:52 +1000)]
Merge tag 'drm-intel-fixes-2018-11-15' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix Bugzilla #108712: Fix incorrect EU count report from kernel
- Fix to account for scale factor when calculating initial phase on scaled output
- Avoid too trigger-happy HPD storm detection and fix a race and an OOPS for MST systems.
- Relocation race fix for Gen4/5
- A couple ICL fixes and dependencies for above Fixes:.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181115164709.GA13430@jlahtine-desk.ger.corp.intel.com
2 years agoMerge tag 'selinux-pr-20181115' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 15 Nov 2018 17:26:09 +0000 (11:26 -0600)]
Merge tag 'selinux-pr-20181115' of git://git./linux/kernel/git/pcmoore/selinux

Pull SELinux fixes from Paul Moore:
 "Two small SELinux fixes for v4.20.

  Ondrej's patch adds a check on user input, and my patch ensures we
  don't look past the end of a buffer.

  Both patches are quite small and pass the selinux-testsuite"

* tag 'selinux-pr-20181115' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: fix non-MLS handling in mls_context_to_sid()
  selinux: check length properly in SCTP bind hook

2 years agoMerge tag 'pinctrl-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Thu, 15 Nov 2018 17:20:06 +0000 (11:20 -0600)]
Merge tag 'pinctrl-v4.20-2' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:

 - A bunch of fixes for the Allwinner meson platform

 - Establish a git repo for Intel pin control in MAINTAINERS

* tag 'pinctrl-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  MAINTAINERS: Add tree link for Intel pin control driver
  pinctrl: meson: fix meson8b ao pull register bits
  pinctrl: meson: fix meson8 ao pull register bits
  pinctrl: meson: fix gxl ao pull register bits
  pinctrl: meson: fix gxbb ao pull register bits
  pinctrl: meson: fix pinconf bias disable

2 years agoMerge tag 'nfs-for-4.20-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Thu, 15 Nov 2018 16:59:37 +0000 (10:59 -0600)]
Merge tag 'nfs-for-4.20-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

 Stable fixes:

   - Don't exit the NFSv4 state manager without clearing
     NFS4CLNT_MANAGER_RUNNING

  Bugfixes:

   - Fix an Oops when destroying the RPCSEC_GSS credential cache

   - Fix an Oops during delegation callbacks

   - Ensure that the NFSv4 state manager exits the loop on SIGKILL

   - Fix a bogus get/put in generic_key_to_expire()"

* tag 'nfs-for-4.20-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4: Fix an Oops during delegation callbacks
  SUNRPC: Fix a bogus get/put in generic_key_to_expire()
  SUNRPC: Fix a Oops when destroying the RPCSEC_GSS credential cache
  NFSv4: Ensure that the state manager exits the loop on SIGKILL
  NFSv4: Don't exit the state manager without clearing NFS4CLNT_MANAGER_RUNNING

2 years agoMerge branch 'drm-fixes-4.20' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 15 Nov 2018 16:14:42 +0000 (02:14 +1000)]
Merge branch 'drm-fixes-4.20' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

Fixes for 4.20:
- Fix for huge page handling that caused a GPUVM fault in some cases
- Fix IH ring setup
- Fix for xgmi aperture setup
- Fix for watermark setup for SMU

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181114171853.2866-1-alexander.deucher@amd.com
2 years agoMerge tag 'drm-misc-fixes-2018-11-14' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Thu, 15 Nov 2018 16:12:27 +0000 (02:12 +1000)]
Merge tag 'drm-misc-fixes-2018-11-14' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Cross-subsystem:
- omap: Instantiate dss children in omapdss instead of mach (Laurent)

Other:
- htmldocs build warning (Sean)
- MST NULL deref fix (Stanislav)
- omap: Various runtime ref gets on probe/bind (Laurent)
- omap: Fix to the above dss children patch (Tony)

Cc: Sean Paul <sean@poorly.run>
Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20181114204542.GA52569@art_vandelay
2 years agoselftests/powerpc: Adjust wild_bctr to build with old binutils
Gustavo Romero [Thu, 15 Nov 2018 02:33:30 +0000 (21:33 -0500)]
selftests/powerpc: Adjust wild_bctr to build with old binutils

Currently the selftest wild_bctr can fail to build when an old gcc is
used, notably on gcc using a binutils version <= 2.27, because the
assembler does not support the integer suffix UL.

This patch adjusts the wild_bctr test so the REG_POISON value is still
treated as an unsigned long for the shifts on compilation but the UL
suffix is absent on the stringification, so the inline asm code
generated has no UL suffixes.

Signed-off-by: Gustavo Romero <gromero@linux.vnet.ibm.com>
[mpe: Wrap long line]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2 years agodrm/i915: Account for scale factor when calculating initial phase
Ville Syrjälä [Wed, 14 Nov 2018 13:32:55 +0000 (15:32 +0200)]
drm/i915: Account for scale factor when calculating initial phase

To get the initial phase correct we need to account for the scale
factor as well. I forgot this initially and was mostly looking at
heavily upscaled content where the minor difference between -0.5
and the proper initial phase was not readily apparent.

And let's toss in a comment that tries to explain the formula
a little bit.

v2: The initial phase upper limit is 1.5, not 24.0!

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 0a59952b24e2 ("drm/i915: Configure SKL+ scaler initial phase correctly")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181029181820.21956-1-ville.syrjala@linux.intel.com
Tested-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Tested-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> #irc
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> #irc
(cherry picked from commit e7a278a329dd8aa2c70c564849f164cb5673689c)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915: Clean up skl_program_scaler()
Ville Syrjälä [Wed, 14 Nov 2018 11:49:24 +0000 (13:49 +0200)]
drm/i915: Clean up skl_program_scaler()

Remove the "sizes are 0 based" stuff that is not even true for the
scaler.

v2: Rebase

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181101151736.20522-1-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit d0105af939769393d6447a04cee2d1ae12e3f09a)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915: Move programming plane scaler to its own function.
Maarten Lankhorst [Wed, 14 Nov 2018 11:49:23 +0000 (13:49 +0200)]
drm/i915: Move programming plane scaler to its own function.

This cleans the code up slightly, and will make other changes easier.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180920102711.4184-8-maarten.lankhorst@linux.intel.com
(cherry picked from commit ab5c60bf76755d24ae8de5c1c6ac594934656ace)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agoefi: Permit calling efi_mem_reserve_persistent() from atomic context
Ard Biesheuvel [Wed, 14 Nov 2018 17:55:44 +0000 (09:55 -0800)]
efi: Permit calling efi_mem_reserve_persistent() from atomic context

Currently, efi_mem_reserve_persistent() may not be called from atomic
context, since both the kmalloc() call and the memremap() call may
sleep.

The kmalloc() call is easy enough to fix, but the memremap() call
needs to be moved into an init hook since we cannot control the
memory allocation behavior of memremap() at the call site.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20181114175544.12860-6-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agoefi/arm: Defer persistent reservations until after paging_init()
Ard Biesheuvel [Wed, 14 Nov 2018 17:55:43 +0000 (09:55 -0800)]
efi/arm: Defer persistent reservations until after paging_init()

The new memory EFI reservation feature we introduced to allow memory
reservations to persist across kexec may trigger an unbounded number
of calls to memblock_reserve(). The memblock subsystem can deal with
this fine, but not before memblock resizing is enabled, which we can
only do after paging_init(), when the memory we reallocate the array
into is actually mapped.

So break out the memreserve table processing into a separate routine
and call it after paging_init() on arm64. On ARM, because of limited
reviewing bandwidth of the maintainer, we cannot currently fix this,
so instead, disable the EFI persistent memreserve entirely on ARM so
we can fix it later.

Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20181114175544.12860-5-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agoefi/arm/libstub: Pack FDT after populating it
Ard Biesheuvel [Wed, 14 Nov 2018 17:55:42 +0000 (09:55 -0800)]
efi/arm/libstub: Pack FDT after populating it

Commit:

  24d7c494ce46 ("efi/arm-stub: Round up FDT allocation to mapping size")

increased the allocation size for the FDT image created by the stub to a
fixed value of 2 MB, to simplify the former code that made several
attempts with increasing values for the size. This is reasonable
given that the allocation is of type EFI_LOADER_DATA, which is released
to the kernel unless it is explicitly memblock_reserve()d by the early
boot code.

However, this allocation size leaked into the 'size' field of the FDT
header metadata, and so the entire allocation remains occupied by the
device tree binary, even if most of it is not used to store device tree
information.

So call fdt_pack() to shrink the FDT data structure to its minimum size
after populating all the fields, so that the remaining memory is no
longer wasted.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: <stable@vger.kernel.org> # v4.12+
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Fixes: 24d7c494ce46 ("efi/arm-stub: Round up FDT allocation to mapping size")
Link: http://lkml.kernel.org/r/20181114175544.12860-4-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agoefi/arm: Revert deferred unmap of early memmap mapping
Ard Biesheuvel [Wed, 14 Nov 2018 17:55:41 +0000 (09:55 -0800)]
efi/arm: Revert deferred unmap of early memmap mapping

Commit:

  3ea86495aef2 ("efi/arm: preserve early mapping of UEFI memory map longer for BGRT")

deferred the unmap of the early mapping of the UEFI memory map to
accommodate the ACPI BGRT code, which looks up the memory type that
backs the BGRT table to validate it against the requirements of the UEFI spec.

Unfortunately, this causes problems on ARM, which does not permit
early mappings to persist after paging_init() is called, resulting
in a WARN() splat. Since we don't support the BGRT table on ARM anway,
let's revert ARM to the old behaviour, which is to take down the
early mapping at the end of efi_init().

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Fixes: 3ea86495aef2 ("efi/arm: preserve early mapping of UEFI memory ...")
Link: http://lkml.kernel.org/r/20181114175544.12860-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agoefi: Fix debugobjects warning on 'efi_rts_work'
Waiman Long [Wed, 14 Nov 2018 17:55:40 +0000 (09:55 -0800)]
efi: Fix debugobjects warning on 'efi_rts_work'

The following commit:

  9dbbedaa6171 ("efi: Make efi_rts_work accessible to efi page fault handler")

converted 'efi_rts_work' from an auto variable to a global variable.
However, when submitting the work, INIT_WORK_ONSTACK() was still used,
causing the following complaint from debugobjects:

  ODEBUG: object 00000000ed27b500 is NOT on stack 00000000c7d38760, but annotated.

Change the macro to just INIT_WORK() to eliminate the warning.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Fixes: 9dbbedaa6171 ("efi: Make efi_rts_work accessible to efi page fault handler")
Link: http://lkml.kernel.org/r/20181114175544.12860-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2 years agopowerpc/64: Fix kernel stack 16-byte alignment
Nicholas Piggin [Thu, 15 Nov 2018 02:34:27 +0000 (12:34 +1000)]
powerpc/64: Fix kernel stack 16-byte alignment

Commit 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather
than thread_struct") changed sizeof(struct pt_regs) % 16 from 0 to 8,
which causes the interrupt frame allocation on kernel entry to put the
kernel stack out of alignment.

Quadword (16-byte) alignment for the stack is required by both the
64-bit v1 ABI (v1.9 § 3.2.2) and the 64-bit v2 ABI (v1.1 § 2.2.2.1).

Add a pad field to fix alignment, and add a BUILD_BUG_ON to catch this
in future.

Fixes: 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2 years agoMerge tag 'riscv-for-linus-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 14 Nov 2018 23:14:40 +0000 (17:14 -0600)]
Merge tag 'riscv-for-linus-4.20-rc2' of git://git./linux/kernel/git/palmer/riscv-linux

Pull RISC-V fixes from Palmer Dabbelt:
 "This contains a few patches that fix various issues in the RISC-V
  port:

   - enable printk timestamps in the RISC-V defconfig.

   - a whitespace fix to "struct pt_regs".

   - add a "vdso_install" target for RISC-V.

   - a pair of build fixes: one to fix a typo in our makefile, and one
     to clean up some warnings.

  There will probably be more patches from us for 4.20, but I don't have
  anything that's ready to go right now so I'm going to hold off a bit.

  Right now the only concrete thing I know I want to make sure gets
  sorted out is our 32-bit stat interface, which I don't want sitting in
  limbo for another cycle as we have to get RV32I glibc sone"

* tag 'riscv-for-linus-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
  RISC-V: Silence some module warnings on 32-bit
  RISC-V: lib: Fix build error for 64-bit
  riscv: add missing vdso_install target
  riscv: fix spacing in struct pt_regs
  RISC-V: defconfig: Enable printk timestamps

2 years agoMerge tag 'kgdb-fixes-4.20-rc3' of https://git.linaro.org/people/daniel.thompson...
Linus Torvalds [Wed, 14 Nov 2018 23:07:01 +0000 (17:07 -0600)]
Merge tag 'kgdb-fixes-4.20-rc3' of https://git.linaro.org/people/daniel.thompson/linux

Pull kgdb fixes from Daniel Thompson:
 "The most important changes here are two fixes for kdb regressions
  causes by the hashing of %p pointers together with a fix for a
  potential overflow in kdb tab completion handling (and warning fix).

  Also included are a set of changes in preparation to (eventually)
  enable -Wimplicit-fallthrough"

* tag 'kgdb-fixes-4.20-rc3' of https://git.linaro.org/people/daniel.thompson/linux:
  kdb: kdb_support: mark expected switch fall-throughs
  kdb: kdb_keyboard: mark expected switch fall-throughs
  kdb: kdb_main: refactor code in kdb_md_line
  kdb: Use strscpy with destination buffer size
  kdb: print real address of pointers instead of hashed addresses
  kdb: use correct pointer when 'btc' calls 'btt'

2 years agoMerge branch 'fixes-v4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorr...
Linus Torvalds [Wed, 14 Nov 2018 23:03:24 +0000 (17:03 -0600)]
Merge branch 'fixes-v4.20-rc3' of git://git./linux/kernel/git/jmorris/linux-security

Pull integrity fix from James Morris:
 "Fix a bug introduced with in this merge window in 82f94f24475c ("KEYS:
  Provide software public key query function [ver #2]")"

* 'fixes-v4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  integrity: support new struct public_key_signature encoding field

2 years agoMerge tag 'acpi-4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Wed, 14 Nov 2018 21:36:45 +0000 (15:36 -0600)]
Merge tag 'acpi-4.20-rc3' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fix from Rafael Wysocki:
 "Fix a recently introduced build issue in the xpower PMIC driver (Arnd
  Bergmann)"

* tag 'acpi-4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / PMIC: xpower: fix IOSF_MBI dependency

2 years agoMerge tag 'pm-4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Wed, 14 Nov 2018 21:33:45 +0000 (15:33 -0600)]
Merge tag 'pm-4.20-rc3' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These remove a stale DT entry left behind after recent removal of a
  cpufreq driver without users, fix up error handling in the imx6q
  cpufreq driver, fix two issues in the cpufreq documentation, and
  update the ARM cpufreq driver.

  Specifics:

   - Drop stale DT binding for the arm_big_little_dt driver removed
     recently (Sudeep Holla).

   - Fix up error handling in the imx6q cpufreq driver to make it report
     voltage scaling failures (Anson Huang).

   - Fix two issues in the cpufreq documentation (Viresh Kumar, Zhao Wei
     Liew).

   - Fix ARM cpuidle driver initialization regression from the 4.19 time
     frame and rework the driver registration part of it to simplify
     code (Ulf Hansson)"

* tag 'pm-4.20-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ARM: cpuidle: Convert to use cpuidle_register|unregister()
  ARM: cpuidle: Don't register the driver when back-end init returns -ENXIO
  dt-bindings: cpufreq: remove stale arm_big_little_dt entry
  Documentation: cpufreq: Correct a typo
  cpufreq: imx6q: add return value check for voltage scale
  Documentation: cpu-freq: Frequencies aren't always sorted

2 years agoMerge tag 'nfsd-4.20-1' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Wed, 14 Nov 2018 21:31:15 +0000 (15:31 -0600)]
Merge tag 'nfsd-4.20-1' of git://linux-nfs.org/~bfields/linux

Pull nfsd fixes from Bruce Fields:
 "Three nfsd bugfixes.

  None are new bugs, but they all take a little effort to hit, which
  might explain why they weren't found sooner"

* tag 'nfsd-4.20-1' of git://linux-nfs.org/~bfields/linux:
  SUNRPC: drop pointless static qualifier in xdr_get_next_encode_buffer()
  nfsd: COPY and CLONE operations require the saved filehandle to be set
  sunrpc: correct the computation for page_ptr when truncating

2 years agoMerge tag 'pci-v4.20-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Wed, 14 Nov 2018 19:51:47 +0000 (13:51 -0600)]
Merge tag 'pci-v4.20-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Revert a _PXM change that causes silent early boot failure on some AMD
  ThreadRipper systems"

* tag 'pci-v4.20-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  Revert "ACPI/PCI: Pay attention to device-specific _PXM node values"

2 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Wed, 14 Nov 2018 19:49:29 +0000 (13:49 -0600)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is mostly a set of minor and obvious fixes (three in one of the
  new drivers).

  The only substantial change is to move the ufs to the blk-mq now that
  the merge window fixed the suspend/resume issues with blk-mq"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: qla2xxx: Initialize port speed to avoid setting lower speed
  Revert "scsi: ufs: Disable blk-mq for now"
  scsi: NCR5380: Return false instead of NULL
  scsi: qla2xxx: Fix a typo in MODULE_PARM_DESC
  scsi: hisi_sas: Remove set but not used variable 'dq_list'
  scsi: myrs: only build on little-endian platforms
  scsi: myrs: avoid stack overflow warning
  scsi: lpfc: fix remoteport access
  scsi: myrb: fix sprintf buffer overflow warning
  scsi: target/core: Avoid that a kernel oops is triggered when COMPARE AND WRITE fails

2 years agoMerge tag 'rtc-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni...
Linus Torvalds [Wed, 14 Nov 2018 19:47:15 +0000 (13:47 -0600)]
Merge tag 'rtc-4.20-2' of git://git./linux/kernel/git/abelloni/linux

Pull RTC driver fixes from Alexandre Belloni:

 - cmos: stop exporting alarms when not supported

 - hctosys: correctly report range error

 - pcf2127: fix a memory leak

* tag 'rtc-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: pcf2127: fix a kmemleak caused in pcf2127_i2c_gather_write
  rtc: hctosys: Add missing range error reporting
  rtc: cmos: Do not export alarm rtc_ops when we do not support alarms

2 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
Linus Torvalds [Wed, 14 Nov 2018 19:44:52 +0000 (13:44 -0600)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull namespace fix from Eric Biederman:
 "Benjamin Coddington noticed an unkillable busy loop in the kernel that
  anyone who is sufficiently motivated can trigger. This bug did not
  exist in earlier kernels making this bug a regression.

  I have tested the change personally and confirmed that the bug exists
  and that the fix works. This fix has been picked up by linux-next and
  hopefully the automated testing bots and no problems have been
  reported from those sources.

  Ordinarily I would let something like this sit a little longer but I
  am going to be away at Linux Plumbers the rest of this week and I am
  afraid if I don't send the pull request now this fix will get lost"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  mnt: fix __detach_mounts infinite loop

2 years agoMerge branch 'parisc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Wed, 14 Nov 2018 19:42:41 +0000 (13:42 -0600)]
Merge branch 'parisc-4.20-3' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fix from Helge Deller:
 "Revert one patch which changed how spinlocks get released. It breaks
  the rwlock implementation in glibc"

* 'parisc-4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Revert "Release spinlocks using ordered store"

2 years agoMerge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Wed, 14 Nov 2018 19:40:22 +0000 (13:40 -0600)]
Merge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fix from Russell King:
 "It was noticed that one of Julien's patches contained an error, this
  fixes that up"

* 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8810/1: vfp: Fix wrong assignement to ufp_exc

2 years agoSCSI: fix queue cleanup race before queue initialization is done
Ming Lei [Wed, 14 Nov 2018 08:25:51 +0000 (16:25 +0800)]
SCSI: fix queue cleanup race before queue initialization is done

c2856ae2f315d ("blk-mq: quiesce queue before freeing queue") has
already fixed this race, however the implied synchronize_rcu()
in blk_mq_quiesce_queue() can slow down LUN probe a lot, so caused
performance regression.

Then 1311326cf4755c7 ("blk-mq: avoid to synchronize rcu inside blk_cleanup_queue()")
tried to quiesce queue for avoiding unnecessary synchronize_rcu()
only when queue initialization is done, because it is usual to see
lots of inexistent LUNs which need to be probed.

However, turns out it isn't safe to quiesce queue only when queue
initialization is done. Because when one SCSI command is completed,
the user of sending command can be waken up immediately, then the
scsi device may be removed, meantime the run queue in scsi_end_request()
is still in-progress, so kernel panic can be caused.

In Red Hat QE lab, there are several reports about this kind of kernel
panic triggered during kernel booting.

This patch tries to address the issue by grabing one queue usage
counter during freeing one request and the following run queue.

Fixes: 1311326cf4755c7 ("blk-mq: avoid to synchronize rcu inside blk_cleanup_queue()")
Cc: Andrew Jones <drjones@redhat.com>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: linux-scsi@vger.kernel.org
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: stable <stable@vger.kernel.org>
Cc: jianchao.wang <jianchao.w.wang@oracle.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: fix 32 bit overflow in __blkdev_issue_discard()
Dave Chinner [Wed, 14 Nov 2018 15:17:18 +0000 (08:17 -0700)]
block: fix 32 bit overflow in __blkdev_issue_discard()

A discard cleanup merged into 4.20-rc2 causes fstests xfs/259 to
fall into an endless loop in the discard code. The test is creating
a device that is exactly 2^32 sectors in size to test mkfs boundary
conditions around the 32 bit sector overflow region.

mkfs issues a discard for the entire device size by default, and
hence this throws a sector count of 2^32 into
blkdev_issue_discard(). It takes the number of sectors to discard as
a sector_t - a 64 bit value.

The commit ba5d73851e71 ("block: cleanup __blkdev_issue_discard")
takes this sector count and casts it to a 32 bit value before
comapring it against the maximum allowed discard size the device
has. This truncates away the upper 32 bits, and so if the lower 32
bits of the sector count is zero, it starts issuing discards of
length 0. This causes the code to fall into an endless loop, issuing
a zero length discards over and over again on the same sector.

Fixes: ba5d73851e71 ("block: cleanup __blkdev_issue_discard")
Tested-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Killed pointless WARN_ON().

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agodrm/i915/icl: Drop spurious register read from icl_dbuf_slices_update
Mika Kuoppala [Fri, 9 Nov 2018 14:09:23 +0000 (16:09 +0200)]
drm/i915/icl: Drop spurious register read from icl_dbuf_slices_update

Register DBUF_CTL_S2 is read and it's value is not used. As
there is no explanation why we should prime the hardware with
read, remove it as spurious.

Fixes: aa9664ffe863 ("drm/i915/icl: Enable 2nd DBuf slice only when needed")
Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181109140924.2663-1-mika.kuoppala@linux.intel.com
(cherry picked from commit 8577c319b6511fbc391f3775225fecd8b979bc26)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915: fix broadwell EU computation
Lionel Landwerlin [Mon, 12 Nov 2018 12:39:31 +0000 (12:39 +0000)]
drm/i915: fix broadwell EU computation

subslice_mask is an array indexed by slice, not subslice.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 8cc7669355136f ("drm/i915: store all subslice masks")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108712
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181112123931.2815-1-lionel.g.landwerlin@intel.com
(cherry picked from commit 63ac3328f0d1d37f286e397b14d9596ed09d7ca5)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agoxtensa: fix boot parameters address translation
Max Filippov [Wed, 14 Nov 2018 07:46:42 +0000 (23:46 -0800)]
xtensa: fix boot parameters address translation

The bootloader may pass physical address of the boot parameters structure
to the MMUv3 kernel in the register a2. Code in the _SetupMMU block in
the arch/xtensa/kernel/head.S is supposed to map that physical address to
the virtual address in the configured virtual memory layout.

This code haven't been updated when additional 256+256 and 512+512
memory layouts were introduced and it may produce wrong addresses when
used with these layouts.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2 years agopowerpc/numa: Suppress "VPHN is not supported" messages
Satheesh Rajendran [Thu, 8 Nov 2018 05:17:56 +0000 (10:47 +0530)]
powerpc/numa: Suppress "VPHN is not supported" messages

When VPHN function is not supported and during cpu hotplug event,
kernel prints message 'VPHN function not supported. Disabling
polling...'. Currently it prints on every hotplug event, it floods
dmesg when a KVM guest tries to hotplug huge number of vcpus, let's
just print once and suppress further kernel prints.

Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2 years agoselinux: fix non-MLS handling in mls_context_to_sid()
Paul Moore [Wed, 14 Nov 2018 02:44:33 +0000 (21:44 -0500)]
selinux: fix non-MLS handling in mls_context_to_sid()

Commit 95ffe194204a ("selinux: refactor mls_context_to_sid() and make
it stricter") inadvertently changed how we handle labels that did not
contain MLS information.  This patch restores the proper behavior in
mls_context_to_sid() and adds a comment explaining the proper
behavior to help ensure this doesn't happen again.

Fixes: 95ffe194204a ("selinux: refactor mls_context_to_sid() and make it stricter")
Reported-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
2 years agoNFSv4: Fix an Oops during delegation callbacks
Trond Myklebust [Tue, 13 Nov 2018 21:37:54 +0000 (16:37 -0500)]
NFSv4: Fix an Oops during delegation callbacks

If the server sends a CB_GETATTR or a CB_RECALL while the filesystem is
being unmounted, then we can Oops when releasing the inode in
nfs4_callback_getattr() and nfs4_callback_recall().

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2 years agointegrity: support new struct public_key_signature encoding field
Mimi Zohar [Fri, 9 Nov 2018 05:53:40 +0000 (00:53 -0500)]
integrity: support new struct public_key_signature encoding field

On systems with IMA-appraisal enabled with a policy requiring file
signatures, the "good" signature values are stored on the filesystem as
extended attributes (security.ima).  Signature verification failure
would normally be limited to just a particular file (eg. executable),
but during boot signature verification failure could result in a system
hang.

Defining and requiring a new public_key_signature field requires all
callers of asymmetric signature verification to be updated to reflect
the change.  This patch updates the integrity asymmetric_verify()
caller.

Fixes: 82f94f24475c ("KEYS: Provide software public key query function [ver #2]")
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
2 years agokdb: kdb_support: mark expected switch fall-throughs
Gustavo A. R. Silva [Sun, 5 Aug 2018 02:48:44 +0000 (21:48 -0500)]
kdb: kdb_support: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I replaced the code comments with
a proper "fall through" annotation, which is what GCC is expecting
to find.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2 years agokdb: kdb_keyboard: mark expected switch fall-throughs
Gustavo A. R. Silva [Sun, 5 Aug 2018 04:18:25 +0000 (23:18 -0500)]
kdb: kdb_keyboard: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I replaced the code comments with
a proper "fall through" annotation, which is what GCC is expecting
to find.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2 years agokdb: kdb_main: refactor code in kdb_md_line
Gustavo A. R. Silva [Thu, 16 Aug 2018 14:01:41 +0000 (09:01 -0500)]
kdb: kdb_main: refactor code in kdb_md_line

Replace the whole switch statement with a for loop.  This makes the
code clearer and easy to read.

This also addresses the following Coverity warnings:

Addresses-Coverity-ID: 115090 ("Missing break in switch")
Addresses-Coverity-ID: 115091 ("Missing break in switch")
Addresses-Coverity-ID: 114700 ("Missing break in switch")

Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
[daniel.thompson@linaro.org: Tiny grammar change in description]
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2 years agokdb: Use strscpy with destination buffer size
Prarit Bhargava [Thu, 20 Sep 2018 12:59:14 +0000 (08:59 -0400)]
kdb: Use strscpy with destination buffer size

gcc 8.1.0 warns with:

kernel/debug/kdb/kdb_support.c: In function ‘kallsyms_symbol_next’:
kernel/debug/kdb/kdb_support.c:239:4: warning: ‘strncpy’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
     strncpy(prefix_name, name, strlen(name)+1);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/debug/kdb/kdb_support.c:239:31: note: length computed here

Use strscpy() with the destination buffer size, and use ellipses when
displaying truncated symbols.

v2: Use strscpy()

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Jonathan Toppins <jtoppins@redhat.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: kgdb-bugreport@lists.sourceforge.net
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2 years agokdb: print real address of pointers instead of hashed addresses
Christophe Leroy [Thu, 27 Sep 2018 17:17:57 +0000 (17:17 +0000)]
kdb: print real address of pointers instead of hashed addresses

Since commit ad67b74d2469 ("printk: hash addresses printed with %p"),
all pointers printed with %p are printed with hashed addresses
instead of real addresses in order to avoid leaking addresses in
dmesg and syslog. But this applies to kdb too, with is unfortunate:

    Entering kdb (current=0x(ptrval), pid 329) due to Keyboard Entry
    kdb> ps
    15 sleeping system daemon (state M) processes suppressed,
    use 'ps A' to see all.
    Task Addr       Pid   Parent [*] cpu State Thread     Command
    0x(ptrval)      329      328  1    0   R  0x(ptrval) *sh

    0x(ptrval)        1        0  0    0   S  0x(ptrval)  init
    0x(ptrval)        3        2  0    0   D  0x(ptrval)  rcu_gp
    0x(ptrval)        4        2  0    0   D  0x(ptrval)  rcu_par_gp
    0x(ptrval)        5        2  0    0   D  0x(ptrval)  kworker/0:0
    0x(ptrval)        6        2  0    0   D  0x(ptrval)  kworker/0:0H
    0x(ptrval)        7        2  0    0   D  0x(ptrval)  kworker/u2:0
    0x(ptrval)        8        2  0    0   D  0x(ptrval)  mm_percpu_wq
    0x(ptrval)       10        2  0    0   D  0x(ptrval)  rcu_preempt

The whole purpose of kdb is to debug, and for debugging real addresses
need to be known. In addition, data displayed by kdb doesn't go into
dmesg.

This patch replaces all %p by %px in kdb in order to display real
addresses.

Fixes: ad67b74d2469 ("printk: hash addresses printed with %p")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2 years agokdb: use correct pointer when 'btc' calls 'btt'
Christophe Leroy [Thu, 27 Sep 2018 17:17:49 +0000 (17:17 +0000)]
kdb: use correct pointer when 'btc' calls 'btt'

On a powerpc 8xx, 'btc' fails as follows:

Entering kdb (current=0x(ptrval), pid 282) due to Keyboard Entry
kdb> btc
btc: cpu status: Currently on cpu 0
Available cpus: 0
kdb_getarea: Bad address 0x0

when booting the kernel with 'debug_boot_weak_hash', it fails as well

Entering kdb (current=0xba99ad80, pid 284) due to Keyboard Entry
kdb> btc
btc: cpu status: Currently on cpu 0
Available cpus: 0
kdb_getarea: Bad address 0xba99ad80

On other platforms, Oopses have been observed too, see
https://github.com/linuxppc/linux/issues/139

This is due to btc calling 'btt' with %p pointer as an argument.

This patch replaces %p by %px to get the real pointer value as
expected by 'btt'

Fixes: ad67b74d2469 ("printk: hash addresses printed with %p")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
2 years agoselinux: check length properly in SCTP bind hook
Ondrej Mosnacek [Tue, 13 Nov 2018 15:16:08 +0000 (16:16 +0100)]
selinux: check length properly in SCTP bind hook

selinux_sctp_bind_connect() must verify if the address buffer has
sufficient length before accessing the 'sa_family' field. See
__sctp_connect() for a similar check.

The length of the whole address ('len') is already checked in the
callees.

Reported-by: Qian Cai <cai@gmx.us>
Fixes: d452930fd3b9 ("selinux: Add SCTP support")
Cc: <stable@vger.kernel.org> # 4.17+
Cc: Richard Haines <richard_c_haines@btinternet.com>
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Tested-by: Qian Cai <cai@gmx.us>
Signed-off-by: Paul Moore <paul@paul-moore.com>
2 years agodrm/amdgpu: fix huge page handling on Vega10
Christian König [Mon, 12 Nov 2018 17:08:31 +0000 (18:08 +0100)]
drm/amdgpu: fix huge page handling on Vega10

We accidentially set the huge flag on the parent instead of the childs.
This caused some VM faults under memory pressure.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2 years agodrm/amd/pp: Fix truncated clock value when set watermark
Rex Zhu [Tue, 13 Nov 2018 03:15:56 +0000 (11:15 +0800)]
drm/amd/pp: Fix truncated clock value when set watermark

the clk value should be tranferred to MHz first and
then transfer to uint16. otherwise, the clock value
will be truncated.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reported-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2 years agodrm/amdgpu: fix bug with IH ring setup
Philip Yang [Mon, 12 Nov 2018 19:00:45 +0000 (14:00 -0500)]
drm/amdgpu: fix bug with IH ring setup

The bug limits the IH ring wptr address to 40bit. When the system memory
is bigger than 1TB, the bus address is more than 40bit, this causes the
interrupt cannot be handled and cleared correctly.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2 years agoRevert "ACPI/PCI: Pay attention to device-specific _PXM node values"
Bjorn Helgaas [Tue, 13 Nov 2018 14:38:17 +0000 (08:38 -0600)]
Revert "ACPI/PCI: Pay attention to device-specific _PXM node values"

This reverts commit bad7dcd94f3956bcfc0a69ef71fdf0fcca3de4a8.

bad7dcd94f39 ("ACPI/PCI: Pay attention to device-specific _PXM node
values") caused boot failures (no console output at all) for Martin [1]
and Ingo [2] on AMD ThreadRipper systems.

Revert the commit until we figure out how to safely use these
device-specific _PXM values.

[1] https://lore.kernel.org/linux-pci/20180912152140.3676-2-Jonathan.Cameron@huawei.com
[2] https://lore.kernel.org/linux-pci/20181113071712.GA2353@gmail.com
Fixes: bad7dcd94f39 ("ACPI/PCI: Pay attention to device-specific _PXM node values")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2 years agodrm/meson: venc: dmt mode must use encp
Jorge Ramirez-Ortiz [Mon, 12 Nov 2018 18:41:09 +0000 (19:41 +0100)]
drm/meson: venc: dmt mode must use encp

The video mode for DMT is only populated to support encp.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@gmail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1542048069-22603-1-git-send-email-jramirez@baylibre.com
2 years agoRISC-V: Silence some module warnings on 32-bit
Olof Johansson [Wed, 31 Oct 2018 06:47:09 +0000 (23:47 -0700)]
RISC-V: Silence some module warnings on 32-bit

Fixes:

arch/riscv/kernel/module.c: In function 'apply_r_riscv_32_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:23:27: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_pcrel_hi20_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:104:23: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_hi20_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:146:23: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_got_hi20_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:190:60: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_call_plt_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:214:24: note: format string is defined here
arch/riscv/kernel/module.c: In function 'apply_r_riscv_call_rela':
./include/linux/kern_levels.h:5:18: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 3 has type 'Elf32_Addr' {aka 'unsigned int'} [-Wformat=]
arch/riscv/kernel/module.c:236:23: note: format string is defined here

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2 years agoRISC-V: lib: Fix build error for 64-bit
Olof Johansson [Wed, 31 Oct 2018 06:47:07 +0000 (23:47 -0700)]
RISC-V: lib: Fix build error for 64-bit

Fixes the following build error from tinyconfig:

riscv64-unknown-linux-gnu-ld: kernel/sched/fair.o: in function `.L8':
fair.c:(.text+0x70): undefined reference to `__lshrti3'
riscv64-unknown-linux-gnu-ld: kernel/time/clocksource.o: in function `.L0 ':
clocksource.c:(.text+0x334): undefined reference to `__lshrti3'

Fixes: 7f47c73b355f ("RISC-V: Build tishift only on 64-bit")
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2 years agoriscv: add missing vdso_install target
David Abdurachmanov [Mon, 5 Nov 2018 14:35:37 +0000 (15:35 +0100)]
riscv: add missing vdso_install target

Building kernel 4.20 for Fedora as RPM fails, because riscv is missing
vdso_install target in arch/riscv/Makefile.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2 years agoriscv: fix spacing in struct pt_regs
David Abdurachmanov [Mon, 5 Nov 2018 14:40:04 +0000 (15:40 +0100)]
riscv: fix spacing in struct pt_regs

Replace 8 spaces with tab to match styling.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2 years agoRISC-V: defconfig: Enable printk timestamps
Anup Patel [Thu, 1 Nov 2018 05:10:33 +0000 (10:40 +0530)]
RISC-V: defconfig: Enable printk timestamps

The printk timestamps are very useful information to visually see
where kernel is spending time during boot. It also helps us see
the timing of hotplug events at runtime.

This patch enables printk timestamps in RISC-V defconfig so that
we have it enabled by default (similar to other architectures
such as x86_64, arm64, etc).

Signed-off-by: Anup Patel <anup@brainfault.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2 years agoSUNRPC: Fix a bogus get/put in generic_key_to_expire()
Trond Myklebust [Mon, 12 Nov 2018 21:06:51 +0000 (16:06 -0500)]
SUNRPC: Fix a bogus get/put in generic_key_to_expire()

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2 years agoSUNRPC: Fix a Oops when destroying the RPCSEC_GSS credential cache
Trond Myklebust [Mon, 12 Nov 2018 20:30:52 +0000 (15:30 -0500)]
SUNRPC: Fix a Oops when destroying the RPCSEC_GSS credential cache

Commit 07d02a67b7fa causes a use-after free in the RPCSEC_GSS credential
destroy code, because the call to get_rpccred() in gss_destroying_context()
will now always fail to increment the refcount.

While we could just replace the get_rpccred() with a refcount_set(), that
would have the unfortunate consequence of resurrecting a credential in
the credential cache for which we are in the process of destroying the
RPCSEC_GSS context. Rather than do this, we choose to make a copy that
is never added to the cache and use that to destroy the context.

Fixes: 07d02a67b7fa ("SUNRPC: Simplify lookup code")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2 years agoNFSv4: Ensure that the state manager exits the loop on SIGKILL
Trond Myklebust [Mon, 5 Nov 2018 17:17:01 +0000 (12:17 -0500)]
NFSv4: Ensure that the state manager exits the loop on SIGKILL

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2 years agoNFSv4: Don't exit the state manager without clearing NFS4CLNT_MANAGER_RUNNING
Trond Myklebust [Mon, 5 Nov 2018 16:10:50 +0000 (11:10 -0500)]
NFSv4: Don't exit the state manager without clearing NFS4CLNT_MANAGER_RUNNING

If we exit the NFSv4 state manager due to a umount, then we can end up
leaving the NFS4CLNT_MANAGER_RUNNING flag set. If another mount causes
the nfs4_client to be rereferenced before it is destroyed, then we end
up never being able to recover state.

Fixes: 47c2199b6eb5 ("NFSv4.1: Ensure state manager thread dies on last ...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.15+
2 years agodrm/amdgpu: set system aperture to cover whole FB region
shaoyunl [Mon, 12 Nov 2018 16:19:24 +0000 (11:19 -0500)]
drm/amdgpu: set system aperture to cover whole FB region

In XGMI configuration, the FB region covers vram region from peer
device, adjust system aperture to cover all of them

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2 years agolibata: blacklist SAMSUNG MZ7TD256HAFV-000L9 SSD
Diego Viola [Mon, 12 Nov 2018 19:22:52 +0000 (17:22 -0200)]
libata: blacklist SAMSUNG MZ7TD256HAFV-000L9 SSD

med_power_with_dipm still causes freezes after updating the firmware to
the latest version (DXT04L5Q).

Set model_rev to NULL and blacklist the device.

Cc: stable@vger.kernel.org
Signed-off-by: Diego Viola <diego.viola@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoblock: copy ioprio in __bio_clone_fast() and bounce
Hannes Reinecke [Mon, 12 Nov 2018 17:35:25 +0000 (10:35 -0700)]
block: copy ioprio in __bio_clone_fast() and bounce

We need to copy the io priority, too; otherwise the clone will run
with a different priority than the original one.

Fixes: 43b62ce3ff0a ("block: move bio io prio to a new field")
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Fixed up subject, and ordered stores.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agokyber: fix wrong strlcpy() size in trace_kyber_latency()
Omar Sandoval [Mon, 12 Nov 2018 08:08:46 +0000 (00:08 -0800)]
kyber: fix wrong strlcpy() size in trace_kyber_latency()

When copying to the latency type, we should be passing LATENCY_TYPE_LEN,
not DOMAIN_LEN (this isn't a problem in practice because we only pass
"total" or "I/O"). Fix it by changing all of the strlcpy() calls to use
sizeof().

Fixes: 6c3b7af1c975 ("kyber: add tracepoints")
Reported-by: Jordan Glover <Golden_Miller83@protonmail.ch>
Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agodrm/i915: Fix hpd handling for pins with two encoders
Ville Syrjälä [Mon, 12 Nov 2018 13:36:16 +0000 (15:36 +0200)]
drm/i915: Fix hpd handling for pins with two encoders

In my haste to remove irq_port[] I accidentally changed the
way we deal with hpd pins that are shared by multiple encoders
(DP and HDMI for pre-DDI platforms). Previously we would only
handle such pins via ->hpd_pulse(), but now we queue up the
hotplug work for the HDMI encoder directly. Worse yet, we now
count each hpd twice and this increment the hpd storm count
twice as fast. This can lead to spurious storms being detected.

Go back to the old way of doing things, ie. delegate to
->hpd_pulse() for any pin which has an encoder with that hook
implemented. I don't really like the idea of adding irq_port[]
back so let's loop through the encoders first to check if we
have an encoder with ->hpd_pulse() for the pin, and then go
through all the pins and decided on the correct course of action
based on the earlier findings.

I have occasionally toyed with the idea of unifying the pre-DDI
HDMI and DP encoders into a single encoder as well. Besides the
hotplug processing it would have the other benefit of preventing
userspace from trying to enable both encoders at the same time.
That is simply illegal as they share the same clock/data pins.
We have some testcases that will attempt that and thus fail on
many older machines. But for now let's stick to fixing just the
hotplug code.

Cc: stable@vger.kernel.org # 4.19+
Cc: Lyude Paul <lyude@redhat.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Fixes: b6ca3eee18ba ("drm/i915: Nuke dev_priv->irq_port[]")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181108200424.28371-1-ville.syrjala@linux.intel.com
Reviewed-by: Lyude Paul <lyude@redhat.com>
(cherry picked from commit 5a3aeca97af1b6b3498d59a7fd4e8bb95814c108)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915/execlists: Force write serialisation into context image vs execution
Chris Wilson [Thu, 8 Nov 2018 08:17:38 +0000 (08:17 +0000)]
drm/i915/execlists: Force write serialisation into context image vs execution

Ensure that the writes into the context image are completed prior to the
register mmio to trigger execution. Although previously we were assured
by the SDM that all writes are flushed before an uncached memory
transaction (our mmio write to submit the context to HW for execution),
we have empirical evidence to believe that this is not actually the
case.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108656
References: https://bugs.freedesktop.org/show_bug.cgi?id=108315
References: https://bugs.freedesktop.org/show_bug.cgi?id=106887
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181108081740.25615-1-chris@chris-wilson.co.uk
Cc: stable@vger.kernel.org
(cherry picked from commit 987abd5c62f92ee4970b45aa077f47949974e615)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915/icl: Fix power well 2 wrt. DC-off toggling order
Imre Deak [Fri, 2 Nov 2018 18:22:00 +0000 (20:22 +0200)]
drm/i915/icl: Fix power well 2 wrt. DC-off toggling order

To enable DC5/6 power well 2 has to be disabled as for previous
platforms, so fix things up.

Bspec: 4234
Fixes: 67ca07e7ac10 ("drm/i915/icl: Add power well support")
Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181102182200.17219-1-imre.deak@intel.com
(cherry picked from commit a33e1ece777996ddddb1f23a30f8c66422ed0b68)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915: Fix NULL deref when re-enabling HPD IRQs on systems with MST
Lyude Paul [Tue, 6 Nov 2018 21:30:13 +0000 (16:30 -0500)]
drm/i915: Fix NULL deref when re-enabling HPD IRQs on systems with MST

Turns out that if you trigger an HPD storm on a system that has an MST
topology connected to it, you'll end up causing the kernel to eventually
hit a NULL deref:

[  332.339041] BUG: unable to handle kernel NULL pointer dereference at 00000000000000ec
[  332.340906] PGD 0 P4D 0
[  332.342750] Oops: 0000 [#1] SMP PTI
[  332.344579] CPU: 2 PID: 25 Comm: kworker/2:0 Kdump: loaded Tainted: G           O      4.18.0-rc3short-hpd-storm+ #2
[  332.346453] Hardware name: LENOVO 20BWS1KY00/20BWS1KY00, BIOS JBET71WW (1.35 ) 09/14/2018
[  332.348361] Workqueue: events intel_hpd_irq_storm_reenable_work [i915]
[  332.350301] RIP: 0010:intel_hpd_irq_storm_reenable_work.cold.3+0x2f/0x86 [i915]
[  332.352213] Code: 00 00 ba e8 00 00 00 48 c7 c6 c0 aa 5f a0 48 c7 c7 d0 73 62 a0 4c 89 c1 4c 89 04 24 e8 7f f5 af e0 4c 8b 04 24 44 89 f8 29 e8 <41> 39 80 ec 00 00 00 0f 85 43 13 fc ff 41 0f b6 86 b8 04 00 00 41
[  332.354286] RSP: 0018:ffffc90000147e48 EFLAGS: 00010006
[  332.356344] RAX: 0000000000000005 RBX: ffff8802c226c9d4 RCX: 0000000000000006
[  332.358404] RDX: 0000000000000000 RSI: 0000000000000082 RDI: ffff88032dc95570
[  332.360466] RBP: 0000000000000005 R08: 0000000000000000 R09: ffff88031b3dc840
[  332.362528] R10: 0000000000000000 R11: 000000031a069602 R12: ffff8802c226ca20
[  332.364575] R13: ffff8802c2268000 R14: ffff880310661000 R15: 000000000000000a
[  332.366615] FS:  0000000000000000(0000) GS:ffff88032dc80000(0000) knlGS:0000000000000000
[  332.368658] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  332.370690] CR2: 00000000000000ec CR3: 000000000200a003 CR4: 00000000003606e0
[  332.372724] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  332.374773] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  332.376798] Call Trace:
[  332.378809]  process_one_work+0x1a1/0x350
[  332.380806]  worker_thread+0x30/0x380
[  332.382777]  ? wq_update_unbound_numa+0x10/0x10
[  332.384772]  kthread+0x112/0x130
[  332.386740]  ? kthread_create_worker_on_cpu+0x70/0x70
[  332.388706]  ret_from_fork+0x35/0x40
[  332.390651] Modules linked in: i915(O) vfat fat joydev btusb btrtl btbcm btintel bluetooth ecdh_generic iTCO_wdt wmi_bmof i2c_algo_bit drm_kms_helper intel_rapl syscopyarea sysfillrect x86_pkg_temp_thermal sysimgblt coretemp fb_sys_fops crc32_pclmul drm psmouse pcspkr mei_me mei i2c_i801 lpc_ich mfd_core i2c_core tpm_tis tpm_tis_core thinkpad_acpi wmi tpm rfkill video crc32c_intel serio_raw ehci_pci xhci_pci ehci_hcd xhci_hcd [last unloaded: i915]
[  332.394963] CR2: 00000000000000ec

This appears to be due to the fact that with an MST topology, not all
intel_connector structs will have ->encoder set. So, fix this by
skipping connectors without encoders in
intel_hpd_irq_storm_reenable_work().

For those wondering, this bug was found on accident while simulating HPD
storms using a Chamelium connected to a ThinkPad T450s (Broadwell).

Changes since v1:
- Check intel_connector->mst_port instead of intel_connector->encoder

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181106213017.14563-3-lyude@redhat.com
(cherry picked from commit fee61deecb1d850bf34f682a6a452e5ee51b7572)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915: Fix possible race in intel_dp_add_mst_connector()
Lyude Paul [Tue, 6 Nov 2018 21:30:12 +0000 (16:30 -0500)]
drm/i915: Fix possible race in intel_dp_add_mst_connector()

This hasn't caused any issues yet that I'm aware of, but as Ville
Syrjälä pointed out - we need to make sure that
intel_connector->mst_port is set before initializing MST connectors,
since in theory we could potentially check intel_connector->mst_port in
i915_hpd_poll_init_work() after registering the connector but before
having written it's value.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20181106213017.14563-2-lyude@redhat.com
(cherry picked from commit 66a5ab1034be801630816d1fa6cfc30db1a2f0b0)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agodrm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5
Chris Wilson [Mon, 5 Nov 2018 09:43:05 +0000 (09:43 +0000)]
drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5

Exercising the gpu reloc path strenuously revealed an issue where the
updated relocations (from MI_STORE_DWORD_IMM) were not being observed
upon execution. After some experiments with adding pipecontrols (a lot
of pipecontrols (32) as gen4/5 do not have a bit to wait on earlier pipe
controls or even the current on), it was discovered that we merely
needed to delay the EMIT_INVALIDATE by several flushes. It is important
to note that it is the EMIT_INVALIDATE as opposed to the EMIT_FLUSH that
needs the delay as opposed to what one might first expect -- that the
delay is required for the TLB invalidation to take effect (one presumes
to purge any CS buffers) as opposed to a delay after flushing to ensure
the writes have landed before triggering invalidation.

Testcase: igt/gem_tiled_fence_blits
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181105094305.5767-1-chris@chris-wilson.co.uk
(cherry picked from commit 55f99bf2a9c331838c981694bc872cd1ec4070b2)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2 years agoARM: spectre-v2: per-CPU vtables to work around big.Little systems
Russell King [Thu, 19 Jul 2018 11:21:31 +0000 (12:21 +0100)]
ARM: spectre-v2: per-CPU vtables to work around big.Little systems

In big.Little systems, some CPUs require the Spectre workarounds in
paths such as the context switch, but other CPUs do not.  In order
to handle these differences, we need per-CPU vtables.

We are unable to use the kernel's per-CPU variables to support this
as per-CPU is not initialised at times when we need access to the
vtables, so we have to use an array indexed by logical CPU number.

We use an array-of-pointers to avoid having function pointers in
the kernel's read/write .data section.

Reviewed-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2 years agoARM: 8810/1: vfp: Fix wrong assignement to ufp_exc
Julien Thierry [Thu, 8 Nov 2018 16:25:28 +0000 (17:25 +0100)]
ARM: 8810/1: vfp: Fix wrong assignement to ufp_exc

In vfp_preserve_user_clear_hwstate, ufp_exc->fpinst2 gets assigned to
itself. It should actually be hwstate->fpinst2 that gets assigned to the
ufp_exc field.

Fixes commit 3aa2df6ec2ca6bc143a65351cca4266d03a8bc41 ("ARM: 8791/1:
vfp: use __copy_to_user() when saving VFP state").

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>