deliverable/linux.git
8 years agomm, compaction: don't recheck watermarks after COMPACT_SUCCESS
Vlastimil Babka [Sat, 10 Sep 2016 10:34:04 +0000 (20:34 +1000)] 
mm, compaction: don't recheck watermarks after COMPACT_SUCCESS

Joonsoo has reminded me that in a later patch changing watermark checks
throughout compaction I forgot to update checks in
try_to_compact_pages() and compactd_do_work().  Closer inspection
however shows that they are redundant now in the success case, because
compact_zone() now reliably reports this with COMPACT_SUCCESS.  So
effectively the checks just repeat (a subset) of checks that have just
passed.  So instead of checking watermarks again, just test the return
value.

Note it's also possible that compaction would declare failure e.g.
because its find_suitable_fallback() is more strict than simple
watermark check, and then the watermark check we are removing would
then still succeed.  After this patch this is not possible and it's
arguably better, because for long-term fragmentation avoidance we
should rather try a different zone than allocate with the unsuitable
fallback.  If compaction of all zones fail and the allocation is
important enough, it will retry and succeed anyway.

Also remove the stray "bool success" variable from kcompactd_do_work().

Link: http://lkml.kernel.org/r/20160810091226.6709-5-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Hocko <mhocko@kernel.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm, compaction: rename COMPACT_PARTIAL to COMPACT_SUCCESS
Vlastimil Babka [Sat, 10 Sep 2016 10:34:04 +0000 (20:34 +1000)] 
mm, compaction: rename COMPACT_PARTIAL to COMPACT_SUCCESS

COMPACT_PARTIAL has historically meant that compaction returned after
doing some work without fully compacting a zone.  It however didn't
distinguish if compaction terminated because it succeeded in creating the
requested high-order page.  This has changed recently and now we only
return COMPACT_PARTIAL when compaction thinks it succeeded, or the
high-order watermark check in compaction_suitable() passes and no
compaction needs to be done.

So at this point we can make the return value clearer by renaming it to
COMPACT_SUCCESS.  The next patch will remove some redundant tests for
success where compaction just returned COMPACT_SUCCESS.

Link: http://lkml.kernel.org/r/20160810091226.6709-4-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm, compaction: cleanup unused functions
Vlastimil Babka [Sat, 10 Sep 2016 10:34:04 +0000 (20:34 +1000)] 
mm, compaction: cleanup unused functions

Since kswapd compaction moved to kcompactd, compact_pgdat() is not called
anymore, so we remove it.  The only caller of __compact_pgdat() is
compact_node(), so we merge them and remove code that was only reachable
from kswapd.

Link: http://lkml.kernel.org/r/20160810091226.6709-3-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm-compaction-make-whole_zone-flag-ignore-cached-scanner-positions-checkpatch-fixes
Andrew Morton [Sat, 10 Sep 2016 10:34:04 +0000 (20:34 +1000)] 
mm-compaction-make-whole_zone-flag-ignore-cached-scanner-positions-checkpatch-fixes

fix typo in comment

Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm, compaction: make whole_zone flag ignore cached scanner positions
Vlastimil Babka [Sat, 10 Sep 2016 10:34:04 +0000 (20:34 +1000)] 
mm, compaction: make whole_zone flag ignore cached scanner positions

Patch series "make direct compaction more deterministic")

This is mostly a followup to Michal's oom detection rework, which
highlighted the need for direct compaction to provide better feedback in
reclaim/compaction loop, so that it can reliably recognize when compaction
cannot make further progress, and allocation should invoke OOM killer or
fail.  We've discussed this at LSF/MM [1] where I proposed expanding the
async/sync migration mode used in compaction to more general "priorities".
This patchset adds one new priority that just overrides all the
heuristics and makes compaction fully scan all zones.  I don't currently
think that we need more fine-grained priorities, but we'll see.  Other
than that there's some smaller fixes and cleanups, mainly related to the
THP-specific hacks.

I've tested this with stress-highalloc in GFP_KERNEL order-4 and THP-like
order-9 scenarios.  There's some improvement for compaction stats for the
order-4, which is likely due to the better watermarks handling.  In the
previous version I reported mostly noise wrt compaction stats, and
decreased direct reclaim - now the reclaim is without difference.  I
believe this is due to the less aggressive compaction priority increase in
patch 6.

"before" is a mmotm tree prior to 4.7 release plus the first part of the
series that was sent and merged separately

                                    before        after
order-4:

Compaction stalls                    27216       30759
Compaction success                   19598       25475
Compaction failures                   7617        5283
Page migrate success                370510      464919
Page migrate failure                 25712       27987
Compaction pages isolated           849601     1041581
Compaction migrate scanned       143146541   101084990
Compaction free scanned          208355124   144863510
Compaction cost                       1403        1210

order-9:

Compaction stalls                     7311        7401
Compaction success                    1634        1683
Compaction failures                   5677        5718
Page migrate success                194657      183988
Page migrate failure                  4753        4170
Compaction pages isolated           498790      456130
Compaction migrate scanned          565371      524174
Compaction free scanned            4230296     4250744
Compaction cost                        215         203

[1] https://lwn.net/Articles/684611/

This patch (of 11):

A recent patch has added whole_zone flag that compaction sets when
scanning starts from the zone boundary, in order to report that zone has
been fully scanned in one attempt.  For allocations that want to try
really hard or cannot fail, we will want to introduce a mode where
scanning whole zone is guaranteed regardless of the cached positions.

This patch reuses the whole_zone flag in a way that if it's already passed
true to compaction, the cached scanner positions are ignored.  Employing
this flag during reclaim/compaction loop will be done in the next patch.
This patch however converts compaction invoked from userspace via procfs
to use this flag.  Before this patch, the cached positions were first
reset to zone boundaries and then read back from struct zone, so there was
a window where a parallel compaction could replace the reset values,
making the manual compaction less effective.  Using the flag instead of
performing reset is more robust.

Link: http://lkml.kernel.org/r/20160810091226.6709-2-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm/oom_kill.c: fix task_will_free_mem() comment
Michal Hocko [Sat, 10 Sep 2016 10:34:03 +0000 (20:34 +1000)] 
mm/oom_kill.c: fix task_will_free_mem() comment

Attempt to demystify the task_will_free_mem() loop.

Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm: memcontrol: add sanity checks for memcg->id.ref on get/put
Vladimir Davydov [Sat, 10 Sep 2016 10:34:03 +0000 (20:34 +1000)] 
mm: memcontrol: add sanity checks for memcg->id.ref on get/put

Link: http://lkml.kernel.org/r/1c5ddb1c171dbdfc3262252769d6138a29b35b70.1470219853.git.vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agobitops.h: move out get_count_order[_long]() from __KERNEL__ scope
zijun_hu [Sat, 10 Sep 2016 10:34:03 +0000 (20:34 +1000)] 
bitops.h: move out get_count_order[_long]() from __KERNEL__ scope

move out get_count_order[_long]() definitions from scope limited by macro
__KERNEL__

it not only make both functions available in wider region regardless of
whether __KERNEL__ is defined but also keep original region for
get_count_order() before the recent commit c513b4cd2fe9
("mm-vmalloc-fix-align-value-calculation-error-v2-fix-fix")

Link: http://lkml.kernel.org/r/57B2C4CE.80303@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm-vmalloc-fix-align-value-calculation-error-v2-fix-fix
Andrew Morton [Sat, 10 Sep 2016 10:34:03 +0000 (20:34 +1000)] 
mm-vmalloc-fix-align-value-calculation-error-v2-fix-fix

move get_count_order[_long] definitions to pick up fls_long()

Cc: zijun_hu <zijun_hu@htc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm-vmalloc-fix-align-value-calculation-error-v2-fix
Andrew Morton [Sat, 10 Sep 2016 10:34:03 +0000 (20:34 +1000)] 
mm-vmalloc-fix-align-value-calculation-error-v2-fix

locate get_count_order_long() next to get_count_order()

Cc: zijun_hu <zijun_hu@htc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm-vmalloc-fix-align-value-calculation-error-v2
zijun_hu [Sat, 10 Sep 2016 10:34:03 +0000 (20:34 +1000)] 
mm-vmalloc-fix-align-value-calculation-error-v2

i provide another patch called v2 based on your suggestion as shown below
it have following correction against original patch v1
1) use name get_count_order_long() instead of get_order_long()
2) return -1 if @l == 0 to consist with get_order_long()
3) cast type to int before returning from get_count_order_long()
4) move up function parameter checking for __get_vm_area_node()
5) more commit message is offered to make issue and approach clear
any comments about new patch is welcome

Link: http://lkml.kernel.org/r/57AABC8B.1040409@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm-vmalloc-fix-align-value-calculation-error-fix
Andrew Morton [Sat, 10 Sep 2016 10:34:02 +0000 (20:34 +1000)] 
mm-vmalloc-fix-align-value-calculation-error-fix

s/get_order_long()/get_count_order_long()/ to match get_count_order()

Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: zijun_hu <zijun_hu@htc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm/vmalloc.c: fix align value calculation error
zijun_hu [Sat, 10 Sep 2016 10:34:02 +0000 (20:34 +1000)] 
mm/vmalloc.c: fix align value calculation error

It causes double align requirement for __get_vm_area_node() if parameter
size is power of 2 and VM_IOREMAP is set in parameter flags, for example
size=0x10000 -> fls_long(0x10000)=17 -> align=0x20000

get_count_order_long() is implemented and used instead of fls_long() for
fixing the bug, for example
size=0x10000 -> get_count_order_long(0x10000)=16 -> align=0x10000

Link: http://lkml.kernel.org/r/fc045ecf-20fa-0722-b3ac-9a6140488fad@zoho.com
Signed-off-by: zijun_hu <zijun_hu@htc.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm/zsmalloc: add per-class compact trace event
Ganesh Mahendran [Sat, 10 Sep 2016 10:34:02 +0000 (20:34 +1000)] 
mm/zsmalloc: add per-class compact trace event

add per-class compact trace event to get number of migrated objects
and number of freed pages.

trace log is like below:

            bash-3863  [001] ....   141.791366: zs_compact_start: pool zram0
            bash-3863  [001] ....   141.791372: zs_compact: class 254: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791375: zs_compact: class 202: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791385: zs_compact: class 190: 1 objects migrated, 3 pages freed
            bash-3863  [001] ....   141.791393: zs_compact: class 168: 2 objects migrated, 2 pages freed
            bash-3863  [001] ....   141.791396: zs_compact: class 151: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791407: zs_compact: class 144: 5 objects migrated, 4 pages freed
            bash-3863  [001] ....   141.791427: zs_compact: class 126: 8 objects migrated, 8 pages freed
            bash-3863  [001] ....   141.791433: zs_compact: class 111: 1 objects migrated, 4 pages freed
            bash-3863  [001] ....   141.791459: zs_compact: class 107: 18 objects migrated, 12 pages freed
            bash-3863  [001] ....   141.791487: zs_compact: class 100: 18 objects migrated, 16 pages freed
            bash-3863  [001] ....   141.791509: zs_compact: class  94: 18 objects migrated, 9 pages freed
            bash-3863  [001] ....   141.791560: zs_compact: class  91: 44 objects migrated, 24 pages freed
            bash-3863  [001] ....   141.791605: zs_compact: class  83: 35 objects migrated, 20 pages freed
            bash-3863  [001] ....   141.791616: zs_compact: class  76: 8 objects migrated, 4 pages freed
            bash-3863  [001] ....   141.791644: zs_compact: class  74: 21 objects migrated, 9 pages freed
            bash-3863  [001] ....   141.791665: zs_compact: class  71: 18 objects migrated, 10 pages freed
            bash-3863  [001] ....   141.791736: zs_compact: class  67: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791763: zs_compact: class  66: 22 objects migrated, 8 pages freed
            bash-3863  [001] ....   141.791820: zs_compact: class  62: 18 objects migrated, 6 pages freed
            bash-3863  [001] ....   141.791826: zs_compact: class  58: 1 objects migrated, 4 pages freed
            bash-3863  [001] ....   141.791829: zs_compact: class  57: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791834: zs_compact: class  54: 2 objects migrated, 2 pages freed
...
            bash-3863  [001] ....   141.791952: zs_compact: class   4: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791964: zs_compact: class   3: 14 objects migrated, 1 pages freed
            bash-3863  [001] ....   141.791966: zs_compact: class   2: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791968: zs_compact: class   1: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791971: zs_compact: class   0: 0 objects migrated, 0 pages freed
            bash-3863  [001] ....   141.791973: zs_compact_end: pool zram0: 155 pages compacted

Also this patch changes trace_zsmalloc_compact_start[end] to
trace_zs_compact_start[end] to keep function naming consistent with others
in zsmalloc.

Link: http://lkml.kernel.org/r/1467882338-4300-8-git-send-email-opensource.ganesh@gmail.com
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm/zsmalloc: add trace events for zs_compact
Ganesh Mahendran [Sat, 10 Sep 2016 10:34:02 +0000 (20:34 +1000)] 
mm/zsmalloc: add trace events for zs_compact

Currently zsmalloc is widely used in android device.  Sometimes, we want
to see how frequently zs_compact is triggered or how may pages freed by
zs_compact(), or which zsmalloc pool is compacted.

We have backported the zs_compact() to our product(kernel 3.18).  It is
usefull for a longtime running device.  But there is not a convenient
way to get the detailed information of zs_comapct() which is usefull
for performance optimization.  Information about how much time
zs_compact used, which pool is compacted, how many page freed, etc.
With these information, we will know what is going on in zs_comapct.
And draw the relation between free mem and zs_comapct.

Most of the time, user can get the brief information from
trace_mm_shrink_slab_[start | end], but in some senario, they do not use
zsmalloc shrinker, but trigger compaction manually.  So add some trace
events in zs_compact is convenient.  Also we can add some zsmalloc
specific information(pool name, total compact pages, etc) in zsmalloc
trace.

This patch add two trace events for zs_compact(), below the trace log:
-----------------------------
root@land:/ # cat /d/tracing/trace
         kswapd0-125   [007] ...1   174.176979: zsmalloc_compact_start: pool zram0
         kswapd0-125   [007] ...1   174.181967: zsmalloc_compact_end: pool zram0: 608 pages compacted(total 1794)
         kswapd0-125   [000] ...1   184.134475: zsmalloc_compact_start: pool zram0
         kswapd0-125   [000] ...1   184.135010: zsmalloc_compact_end: pool zram0: 62 pages compacted(total 1856)
         kswapd0-125   [003] ...1   226.927221: zsmalloc_compact_start: pool zram0
         kswapd0-125   [003] ...1   226.928575: zsmalloc_compact_end: pool zram0: 250 pages compacted(total 2106)
-----------------------------

Link: http://lkml.kernel.org/r/1465289804-4913-1-git-send-email-opensource.ganesh@gmail.com
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm: oom: deduplicate victim selection code for memcg and global oom
Vladimir Davydov [Sat, 10 Sep 2016 10:34:02 +0000 (20:34 +1000)] 
mm: oom: deduplicate victim selection code for memcg and global oom

When selecting an oom victim, we use the same heuristic for both memory
cgroup and global oom.  The only difference is the scope of tasks to
select the victim from.  So we could just export an iterator over all
memcg tasks and keep all oom related logic in oom_kill.c, but instead we
duplicate pieces of it in memcontrol.c reusing some initially private
functions of oom_kill.c in order to not duplicate all of it.  That looks
ugly and error prone, because any modification of select_bad_process
should also be propagated to mem_cgroup_out_of_memory.

Let's rework this as follows: keep all oom heuristic related code private
to oom_kill.c and make oom_kill.c use exported memcg functions when it's
really necessary (like in case of iterating over memcg tasks).

Link: http://lkml.kernel.org/r/1470056933-7505-1-git-send-email-vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agokernel/watchdog: use nmi registers snapshot in hardlockup handler
Konstantin Khlebnikov [Sat, 10 Sep 2016 10:34:02 +0000 (20:34 +1000)] 
kernel/watchdog: use nmi registers snapshot in hardlockup handler

NMI handler doesn't call set_irq_regs(), it's set only by normal IRQ.
Thus get_irq_regs() returns NULL or stale registers snapshot with IP/SP
pointing to the code interrupted by IRQ which was interrupted by NMI.
NULL isn't a problem: in this case watchdog calls dump_stack() and
prints full stack trace including NMI.  But if we're stuck in IRQ
handler then NMI watchlog will print stack trace without IRQ part at
all.

This patch uses registers snapshot passed into NMI handler as
arguments: these registers points exactly to the instruction
interrupted by NMI.

Fixes: 55537871ef66 ("kernel/watchdog.c: perform all-CPU backtrace in case of hard lockup")
Link: http://lkml.kernel.org/r/146771764784.86724.6006627197118544150.stgit@buzz
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: <stable@vger.kernel.org> [4.4+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agoblock: restore /proc/partitions to not display non-partitionable removable devices
Josh Hunt [Sat, 10 Sep 2016 10:34:01 +0000 (20:34 +1000)] 
block: restore /proc/partitions to not display non-partitionable removable devices

We found with newer kernels we started seeing the cdrom device showing
up in /proc/partitions, but it was not there before.

Looking into this I found that commit d27769ec ("block: add
GENHD_FL_NO_PART_SCAN") introduces this change in behavior.  It's not
clear to me from the commit's changelog if this change was intentional or
not.  This comment still remains: /* Don't show non-partitionable
removeable devices or empty devices */ so I've decided to send a patch to
restore the behavior of not printing unpartitionable removable devices.

Signed-off-by: Josh Hunt <johunt@akamai.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agofs/ocfs2/dlm: remove deprecated create_singlethread_workqueue()
Bhaktipriya Shridhar [Sat, 10 Sep 2016 10:34:01 +0000 (20:34 +1000)] 
fs/ocfs2/dlm: remove deprecated create_singlethread_workqueue()

The workqueue "dlm_worker" queues a single work item &dlm->dispatched_work
and thus it doesn't require execution ordering.  Hence, alloc_workqueue
has been used to replace the deprecated create_singlethread_workqueue
instance.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure.

Since there are fixed number of work items, explicit concurrency
limit is unnecessary here.

Link: http://lkml.kernel.org/r/2b5ad8d6688effe1a9ddb2bc2082d26fbbe00302.1472590094.git.bhaktipriya96@gmail.com
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agofs/ocfs2/super: remove deprecated create_singlethread_workqueue()
Bhaktipriya Shridhar [Sat, 10 Sep 2016 10:34:01 +0000 (20:34 +1000)] 
fs/ocfs2/super: remove deprecated create_singlethread_workqueue()

The workqueue "ocfs2_wq" queues multiple work items viz
&osb->la_enable_wq, &journal->j_recovery_work, &os->os_orphan_scan_work,
&osb->osb_truncate_log_wq which require strict execution ordering.  Hence,
an ordered dedicated workqueue has been used.

WQ_MEM_RECLAIM has been set to ensure forward progress under memory
pressure because the workqueue is being used on a memory reclaim path.

Link: http://lkml.kernel.org/r/66279de510a7f4cfc6e386d99b7e04b3f65fb11b.1472590094.git.bhaktipriya96@gmail.com
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agofs/ocfs2/cluster: remove deprecated create_singlethread_workqueue()
Bhaktipriya Shridhar [Sat, 10 Sep 2016 10:34:01 +0000 (20:34 +1000)] 
fs/ocfs2/cluster: remove deprecated create_singlethread_workqueue()

The workqueue "o2net_wq" queues multiple work items viz
&old_sc->sc_shutdown_work, &sc->sc_rx_work, &sc->sc_connect_work which
require strict execution ordering. Hence, an ordered dedicated workqueue
has been used.

WQ_MEM_RECLAIM has been set to ensure forward progress under memory
pressure.

Link: http://lkml.kernel.org/r/ddc12e5766c79ba26f8a00d98049107f8a1d4866.1472590094.git.bhaktipriya96@gmail.com
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agofs/ocfs2/dlmfs: remove deprecated create_singlethread_workqueue()
Bhaktipriya Shridhar [Sat, 10 Sep 2016 10:34:01 +0000 (20:34 +1000)] 
fs/ocfs2/dlmfs: remove deprecated create_singlethread_workqueue()

The workqueue "user_dlm_worker" queues a single work item &lockres->l_work
per user_lock_res instance and hence it doesn't require execution
ordering.  Hence, alloc_workqueue has been used to replace the deprecated
create_singlethread_workqueue instance.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure.

Since there are fixed number of work items, explicit concurrency
limit is unnecessary here.

Link: http://lkml.kernel.org/r/9748136d3a3b18138ad1d6ba708367aa1fe9f98c.1472590094.git.bhaktipriya96@gmail.com
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agokbuild: simpler generation of assembly constants
Alexey Dobriyan [Sat, 10 Sep 2016 10:34:00 +0000 (20:34 +1000)] 
kbuild: simpler generation of assembly constants

gcc doesn't really look inside "asm" statements and more or less
directly emits it into assembly. So pretend "#define" is CPU
instruction.

C++ comment can't be used because sparc assembler doesn't understand it.

Link: http://lkml.kernel.org/r/20160713173646.GA1910@p183.telecom.by
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agoarm: arch/arm/include/asm/page.h needs personality.h
Andrew Morton [Sat, 10 Sep 2016 10:34:00 +0000 (20:34 +1000)] 
arm: arch/arm/include/asm/page.h needs personality.h

VM_DATA_DEFAULT_FLAGS uses READ_IMPLIES_EXEC, so page.h should include
personality.h to provide this.

This fixes no known bugs and can be safely ignored ;)

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agoMAINTAINERS: update email for VLYNQ bus entry
Florian Fainelli [Sat, 10 Sep 2016 10:34:00 +0000 (20:34 +1000)] 
MAINTAINERS: update email for VLYNQ bus entry

Link: http://lkml.kernel.org/r/1473218738-21836-1-git-send-email-f.fainelli@gmail.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm: avoid endless recursion in dump_page()
Kirill A. Shutemov [Sat, 10 Sep 2016 10:34:00 +0000 (20:34 +1000)] 
mm: avoid endless recursion in dump_page()

dump_page() uses page_mapcount() to get mapcount of the page.
page_mapcount() has VM_BUG_ON_PAGE(PageSlab(page)) as mapcount doesn't
make sense for slab pages and the field in struct page used for other
information.

It leads to recursion if dump_page() called for slub page and DEBUG_VM
is enabled:

dump_page() -> page_mapcount() -> VM_BUG_ON_PAGE() -> dump_page -> ...

Let's avoid calling page_mapcount() for slab pages in dump_page().

Link: http://lkml.kernel.org/r/20160908082137.131076-1-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm, thp: fix leaking mapped pte in __collapse_huge_page_swapin()
Ebru Akagunduz [Sat, 10 Sep 2016 10:34:00 +0000 (20:34 +1000)] 
mm, thp: fix leaking mapped pte in __collapse_huge_page_swapin()

Currently, khugepaged does not permit swapin if there are enough young
pages in a THP.  The problem is when a THP does not have enough young
pages, khugepaged leaks mapped ptes.

This patch prohibits leaking mapped ptes.

Link: http://lkml.kernel.org/r/1472820276-7831-1-git-send-email-ebru.akagunduz@gmail.com
Signed-off-by: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agostackdepot: fix mempolicy use-after-free
Vegard Nossum [Sat, 10 Sep 2016 10:33:59 +0000 (20:33 +1000)] 
stackdepot: fix mempolicy use-after-free

This patch fixes the following:

    BUG: KASAN: use-after-free in alloc_pages_current+0x363/0x370 at addr ffff88010b48102c
    Read of size 2 by task trinity-c2/15425
    CPU: 0 PID: 15425 Comm: trinity-c2 Not tainted 4.8.0-rc2+ #140
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.3-0-ge2fc41e-prebuilt.qemu-proje
    ct.org 04/01/2014
     ffff88010b481040 ffff88010b557650 ffffffff81f08d11 ffff88011a40d380
     ffff88010b481028 ffff88010b557678 ffffffff815dac7c ffff88010b557708
     ffff88010b481028 ffff88011a40d380 ffff88010b5576f8 ffffffff815daf15
    Call Trace:
     [<ffffffff81f08d11>] dump_stack+0x65/0x84
     [<ffffffff815dac7c>] kasan_object_err+0x1c/0x70
     [<ffffffff815daf15>] kasan_report_error+0x1f5/0x4c0
     [<ffffffff815db2fe>] __asan_report_load2_noabort+0x3e/0x40
     [<ffffffff815cb903>] alloc_pages_current+0x363/0x370    <---- use-after-free
     [<ffffffff81fa9954>] depot_save_stack+0x3f4/0x490
     [<ffffffff815d9bb5>] save_stack+0xb5/0xd0
     [<ffffffff815da211>] kasan_slab_free+0x71/0xb0
     [<ffffffff815d6643>] kmem_cache_free+0xa3/0x290
     [<ffffffff815c8149>] __mpol_put+0x19/0x20               <---- free
     [<ffffffff81260635>] do_exit+0x1515/0x2b70
     [<ffffffff81261dc4>] do_group_exit+0xf4/0x2f0
     [<ffffffff81281c5d>] get_signal+0x53d/0x1120
     [<ffffffff8119e993>] do_signal+0x83/0x1e20
     [<ffffffff810027af>] exit_to_usermode_loop+0xaf/0x140
     [<ffffffff810051e4>] syscall_return_slowpath+0x144/0x170
     [<ffffffff83ae406f>] ret_from_fork+0x2f/0x40
    Read of size 2 by task trinity-c2/15425

The problem is that we may be calling alloc_pages() in a code path where
current->mempolicy has already been freed.

By passing __GFP_THISNODE we will always use default_mempolicy (which
cannot be freed).

Link: https://lkml.org/lkml/2016/7/29/277
Link: https://github.com/google/kasan/issues/35
Link: http://lkml.kernel.org/r/1471603265-31804-1-git-send-email-vegard.nossum@oracle.com
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm/page_alloc.c: replace set_dma_reserve to set_memory_reserve
Srikar Dronamraju [Sat, 10 Sep 2016 10:33:59 +0000 (20:33 +1000)] 
mm/page_alloc.c: replace set_dma_reserve to set_memory_reserve

Expand the scope of the existing dma_reserve to accommodate other memory
reserves too.  Accordingly rename variable dma_reserve to
nr_memory_reserve.

set_memory_reserve() also takes a new parameter that helps to identify if
the current value needs to be incremented.

Link: http://lkml.kernel.org/r/1470330729-6273-1-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Suggested-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomm/slab: improve performance of gathering slabinfo stats
Aruna Ramakrishna [Sat, 10 Sep 2016 10:33:59 +0000 (20:33 +1000)] 
mm/slab: improve performance of gathering slabinfo stats

On large systems, when some slab caches grow to millions of objects (and
many gigabytes), running 'cat /proc/slabinfo' can take up to 1-2 seconds.
During this time, interrupts are disabled while walking the slab lists
(slabs_full, slabs_partial, and slabs_free) for each node, and this
sometimes causes timeouts in other drivers (for instance, Infiniband).

This patch optimizes 'cat /proc/slabinfo' by maintaining a counter for
total number of allocated slabs per node, per cache.  This counter is
updated when a slab is created or destroyed.  This enables us to skip
traversing the slabs_full list while gathering slabinfo statistics, and
since slabs_full tends to be the biggest list when the cache is large, it
results in a dramatic performance improvement.  Getting slabinfo
statistics now only requires walking the slabs_free and slabs_partial
lists, and those lists are usually much smaller than slabs_full.  We
tested this after growing the dentry cache to 70GB, and the performance
improved from 2s to 5ms.

Link: http://lkml.kernel.org/r/1472517876-26814-1-git-send-email-aruna.ramakrishna@oracle.com
Signed-off-by: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agokhugepaged: fix use-after-free in collapse_huge_page()
Kirill A. Shutemov [Sat, 10 Sep 2016 10:33:59 +0000 (20:33 +1000)] 
khugepaged: fix use-after-free in collapse_huge_page()

hugepage_vma_revalidate() tries to re-check if we still should try to
collapse small pages into huge one after the re-acquiring mmap_sem.

The problem Dmitry Vyukov reported[1] is that the vma found by
hugepage_vma_revalidate() can be suitable for huge pages, but not the same
vma we had before dropping mmap_sem.  And dereferencing original vma can
lead to fun results..

Let's use vma hugepage_vma_revalidate() found instead of assuming it's the
same as what we had before the lock was dropped.  [1]
http://lkml.kernel.org/r/CACT4Y+Z3gigBvhca9kRJFcjX0G70V_nRhbwKBU+yGoESBDKi9Q@mail.gmail.com

Link: http://lkml.kernel.org/r/20160907122559.GA6542@black.fi.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: syzkaller <syzkaller@googlegroups.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agoMAINTAINERS: Maik has moved
Sudip Mukherjee [Sat, 10 Sep 2016 10:33:59 +0000 (20:33 +1000)] 
MAINTAINERS: Maik has moved

Maik is no longer using the plusserver.de email, update with his
current email.

Link: http://lkml.kernel.org/r/1473007794-27960-1-git-send-email-sudipm.mukherjee@gmail.com
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Cc: Maik Broemme <mbroemme@libmpq.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agoocfs2/dlm: fix race between convert and migration
Joseph Qi [Sat, 10 Sep 2016 10:33:58 +0000 (20:33 +1000)] 
ocfs2/dlm: fix race between convert and migration

Commit ac7cf246dfdb ("ocfs2/dlm: fix race between convert and recovery")
checks if lockres master has changed to identify whether new master has
finished recovery or not.  This will introduce a race that right after old
master does umount ( means master will change), a new convert request
comes.

In this case, it will reset lockres state to DLM_RECOVERING and then retry
convert, and then fail with lockres->l_action being set to
OCFS2_AST_INVALID, which will cause inconsistent lock level between ocfs2
and dlm, and then finally BUG.

Since dlm recovery will clear lock->convert_pending in
dlm_move_lockres_to_recovery_list, we can use it to correctly identify the
race case between convert and recovery.  So fix it.

Fixes: ac7cf246dfdb ("ocfs2/dlm: fix race between convert and recovery")
Link: http://lkml.kernel.org/r/57CE1569.8010704@huawei.com
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Jun Piao <piaojun@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agomem-hotplug: Don't clear the only node in new_node_page()
Li Zhong [Sat, 10 Sep 2016 10:33:58 +0000 (20:33 +1000)] 
mem-hotplug: Don't clear the only node in new_node_page()

394e31d2c ("mem-hotplug: alloc new page from a nearest neighbor node when
mem-offline") introduced new_node_page() for memory hotplug.

In new_node_page(), the nid is cleared before calling
__alloc_pages_nodemask().  But if it is the only node of the system, and
the first round allocation fails, it will not be able to get memory from
an empty nodemask, and will trigger oom.

The patch checks whether it is the last node on the system, and if it is, then
don't clear the nid in the nodemask.

Fixes: 394e31d2ceb4 ("mem-hotplug: alloc new page from a nearest neighbor node when mem-offline")
Link: http://lkml.kernel.org/r/1473044391.4250.19.camel@TP420
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Reported-by: John Allen <jallen@linux.vnet.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
8 years agoMerge tag 'ceph-for-4.8-rc6' of git://github.com/ceph/ceph-client
Linus Torvalds [Thu, 8 Sep 2016 19:23:13 +0000 (12:23 -0700)] 
Merge tag 'ceph-for-4.8-rc6' of git://github.com/ceph/ceph-client

Pull ceph fix from Ilya Dryomov:
 "A fix for a 4.7 performance regression, caused by a typo in an if
  condition"

* tag 'ceph-for-4.8-rc6' of git://github.com/ceph/ceph-client:
  ceph: do not modify fi->frag in need_reset_readdir()

8 years agoMerge branch 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
Linus Torvalds [Thu, 8 Sep 2016 19:19:24 +0000 (12:19 -0700)] 
Merge branch 'dmi-for-linus' of git://git./linux/kernel/git/jdelvare/staging

Pull dmi fix from Jean Delvare.

* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  dmi-id: don't free dev structure after calling device_register

8 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Thu, 8 Sep 2016 19:05:15 +0000 (12:05 -0700)] 
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "This is a slightly larger batch of fixes that we've been sitting on a
  few -rcs.  Most of them are simple oneliners, but there are two sets
  that are slightly larger and worth pointing out:

   - A set of patches to OMAP to deal with hwmod for RTC on am33xx
     (beaglebone SoC, among others).  It's the only clock that ever has
     a valid offset of 0, so a new flag needed introduction once this
     problem was discovered.

   - A collection of CCI fixes for performance counters discovered once
     people started using it on X-Gene CPUs"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (37 commits)
  arm-cci: pmu: Fix typo in event name
  Revert "ARM: tegra: fix erroneous address in dts"
  ARM: dts: imx6qdl: Fix SPDIF regression
  ARM: imx6: add missing BM_CLPCR_BYPASS_PMIC_READY setting for imx6sx
  ARM: dts: imx7d-sdb: fix ti,x-plate-ohms property name
  ARM: dts: kirkwood: Fix PCIe label on OpenRD
  ARM: kirkwood: ib62x0: fix size of u-boot environment partition
  bus: arm-ccn: make event groups reliable
  bus: arm-ccn: fix hrtimer registration
  bus: arm-ccn: fix PMU interrupt flags
  ARM: tegra: Correct polarity for Tegra114 PMIC interrupt
  MAINTAINERS: add tree entry for ARM/UniPhier architecture
  ARM: sun5i: Fix typo in trip point temperature
  MAINTAINERS: Switch to kernel.org account for Krzysztof Kozlowski
  ARM: imx6ul: populates platform device at .init_machine
  bus: arm-ccn: Add missing event attribute exclusions for host/guest
  bus: arm-ccn: Correct required arguments for XP PMU events
  bus: arm-ccn: Fix XP watchpoint settings bitmask
  bus: arm-ccn: Do not attempt to configure XPs for cycle counter
  bus: arm-ccn: Fix PMU handling of MN
  ...

8 years agodmi-id: don't free dev structure after calling device_register
Allen Hung [Fri, 15 Jul 2016 09:42:22 +0000 (17:42 +0800)] 
dmi-id: don't free dev structure after calling device_register

dmi_dev is freed in error exit code but, according to the document
of device_register, it should never directly free device structure
after calling this function, even if it returned an error! Use
put_device() instead.

Signed-off-by: Allen Hung <allen_hung@dell.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
8 years agoMerge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Linus Torvalds [Thu, 8 Sep 2016 04:28:26 +0000 (21:28 -0700)] 
Merge branch 'for-rc' of git://git./linux/kernel/git/rzhang/linux

Pull thermal fix from Zhang Rui:
 "Only one patch this time, which fixes a crash in rcar_thermal driver.
  From Dirk Behme"

* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  thermal: rcar_thermal: Fix priv->zone error handling

8 years agoMerge tag 'sunxi-fixes-for-4.8' of https://git.kernel.org/pub/scm/linux/kernel/git...
Olof Johansson [Thu, 8 Sep 2016 04:25:08 +0000 (21:25 -0700)] 
Merge tag 'sunxi-fixes-for-4.8' of https://git./linux/kernel/git/mripard/linux into fixes

Allwinner fixes for 4.8

A single patch fixing a typo in the temperature trip points in the A13
DTSI.

* tag 'sunxi-fixes-for-4.8' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  ARM: sun5i: Fix typo in trip point temperature

Signed-off-by: Olof Johansson <olof@lixom.net>
8 years agoarm-cci: pmu: Fix typo in event name
Suzuki K Poulose [Mon, 5 Sep 2016 15:27:53 +0000 (16:27 +0100)] 
arm-cci: pmu: Fix typo in event name

For one of the CCI events exposed under sysfs, "snoop" was typo'd as
"snopp". Correct this such that users see the expected event name when
enumerating events via sysfs.

Cc: arm@kernel.org
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
8 years agoMerge tag 'imx-fixes-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...
Olof Johansson [Thu, 8 Sep 2016 04:24:22 +0000 (21:24 -0700)] 
Merge tag 'imx-fixes-4.8-2' of git://git./linux/kernel/git/shawnguo/linux into fixes

i.MX fixes for 4.8, 2nd round:
 - Fix misspelled "ti,x-plate-ohms" property name of touchscreen
   controller for imx7d-sdb DTS.
 - Add missing BM_CLPCR_BYPASS_PMIC_READY setting for i.MX6SX to get
   suspend/resume work properly.
 - Fix SPDIF regression on imx6qdl which caused by a clock update on
   spdif device node.

* tag 'imx-fixes-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: dts: imx6qdl: Fix SPDIF regression
  ARM: imx6: add missing BM_CLPCR_BYPASS_PMIC_READY setting for imx6sx
  ARM: dts: imx7d-sdb: fix ti,x-plate-ohms property name

Signed-off-by: Olof Johansson <olof@lixom.net>
8 years agoRevert "ARM: tegra: fix erroneous address in dts"
Olof Johansson [Thu, 8 Sep 2016 04:16:40 +0000 (21:16 -0700)] 
Revert "ARM: tegra: fix erroneous address in dts"

This reverts commit b5c86b7496d74f6e454bcab5166efa023e1f0459.

This is no longer needed due to other changes going into 4.8 to rename
the unit addresses on a large number of device nodes. So it was picked up
for v4.8-rc1 in error.

Reported-by: Ralf Ramsauer <ralf@ramses-pyramidenbau.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
8 years agoMerge tag 'usercopy-v4.8-rc6-part2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 7 Sep 2016 21:03:49 +0000 (14:03 -0700)] 
Merge tag 'usercopy-v4.8-rc6-part2' of git://git./linux/kernel/git/kees/linux

Pull more hardened usercopyfixes from Kees Cook:

 - force check_object_size() to be inline too

 - move page-spanning check behind a CONFIG since it's triggering false
   positives

[ Changed the page-spanning config option to depend on EXPERT in the
  merge.  That way it still gets build testing, and you can enable it if
  you want to, but is never enabled for "normal" configurations ]

* tag 'usercopy-v4.8-rc6-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  usercopy: remove page-spanning test for now
  usercopy: force check_object_size() inline

8 years agousercopy: remove page-spanning test for now
Kees Cook [Wed, 7 Sep 2016 16:54:34 +0000 (09:54 -0700)] 
usercopy: remove page-spanning test for now

A custom allocator without __GFP_COMP that copies to userspace has been
found in vmw_execbuf_process[1], so this disables the page-span checker
by placing it behind a CONFIG for future work where such things can be
tracked down later.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1373326

Reported-by: Vinson Lee <vlee@freedesktop.org>
Fixes: f5509cc18daa ("mm: Hardened usercopy")
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agousercopy: force check_object_size() inline
Kees Cook [Wed, 7 Sep 2016 16:39:32 +0000 (09:39 -0700)] 
usercopy: force check_object_size() inline

Just for good measure, make sure that check_object_size() is always
inlined too, as already done for copy_*_user() and __copy_*_user().

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoMerge tag 'seccomp-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees...
Linus Torvalds [Wed, 7 Sep 2016 17:46:06 +0000 (10:46 -0700)] 
Merge tag 'seccomp-v4.8-rc6' of git://git./linux/kernel/git/kees/linux

Pull seccomp fixes from Kees Cook:
 "Fix UM seccomp vs ptrace, after reordering landed"

* tag 'seccomp-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  seccomp: Remove 2-phase API documentation
  um/ptrace: Fix the syscall number update after a ptrace
  um/ptrace: Fix the syscall_trace_leave call

8 years agoMerge tag 'usercopy-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees...
Linus Torvalds [Wed, 7 Sep 2016 16:29:36 +0000 (09:29 -0700)] 
Merge tag 'usercopy-v4.8-rc6' of git://git./linux/kernel/git/kees/linux

Pull hardened usercopy fixes from Kees Cook:

 - inline copy_*_user() for correct use of __builtin_const_p() for
   hardened usercopy and the recent compile-time checks.

 - switch hardened usercopy to only check non-const size arguments to
   avoid meaningless checks on likely-sane const values.

 - update lkdtm usercopy tests to compenstate for the const checking.

* tag 'usercopy-v4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  lkdtm: adjust usercopy tests to bypass const checks
  usercopy: fold builtin_const check into inline function
  x86/uaccess: force copy_*_user() to be inlined

8 years agoseccomp: Remove 2-phase API documentation
Mickaël Salaün [Mon, 1 Aug 2016 21:01:57 +0000 (23:01 +0200)] 
seccomp: Remove 2-phase API documentation

Fixes: 8112c4f140fa ("seccomp: remove 2-phase API")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoum/ptrace: Fix the syscall number update after a ptrace
Mickaël Salaün [Mon, 1 Aug 2016 21:01:56 +0000 (23:01 +0200)] 
um/ptrace: Fix the syscall number update after a ptrace

Update the syscall number after each PTRACE_SETREGS on ORIG_*AX.

This is needed to get the potentially altered syscall number in the
seccomp filters after RET_TRACE.

This fix four seccomp_bpf tests:
> [ RUN      ] TRACE_syscall.skip_after_RET_TRACE
> seccomp_bpf.c:1560:TRACE_syscall.skip_after_RET_TRACE:Expected -1 (18446744073709551615) == syscall(39) (26)
> seccomp_bpf.c:1561:TRACE_syscall.skip_after_RET_TRACE:Expected 1 (1) == (*__errno_location ()) (22)
> [     FAIL ] TRACE_syscall.skip_after_RET_TRACE
> [ RUN      ] TRACE_syscall.kill_after_RET_TRACE
> TRACE_syscall.kill_after_RET_TRACE: Test exited normally instead of by signal (code: 1)
> [     FAIL ] TRACE_syscall.kill_after_RET_TRACE
> [ RUN      ] TRACE_syscall.skip_after_ptrace
> seccomp_bpf.c:1622:TRACE_syscall.skip_after_ptrace:Expected -1 (18446744073709551615) == syscall(39) (26)
> seccomp_bpf.c:1623:TRACE_syscall.skip_after_ptrace:Expected 1 (1) == (*__errno_location ()) (22)
> [     FAIL ] TRACE_syscall.skip_after_ptrace
> [ RUN      ] TRACE_syscall.kill_after_ptrace
> TRACE_syscall.kill_after_ptrace: Test exited normally instead of by signal (code: 1)
> [     FAIL ] TRACE_syscall.kill_after_ptrace

Fixes: 26703c636c1f ("um/ptrace: run seccomp after ptrace")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: James Morris <jmorris@namei.org>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoum/ptrace: Fix the syscall_trace_leave call
Mickaël Salaün [Mon, 1 Aug 2016 21:01:55 +0000 (23:01 +0200)] 
um/ptrace: Fix the syscall_trace_leave call

Keep the same semantic as before the commit 26703c636c1f: deallocate
audit context and fake a proper syscall exit.

This fix a kernel panic triggered by the seccomp_bpf test:
> [ RUN      ] global.ERRNO_valid
> BUG: failure at kernel/auditsc.c:1504/__audit_syscall_entry()!
> Kernel panic - not syncing: BUG!

Fixes: 26703c636c1f ("um/ptrace: run seccomp after ptrace")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: James Morris <jmorris@namei.org>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Tue, 6 Sep 2016 19:33:12 +0000 (12:33 -0700)] 
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "This is the second pull request for the rdma subsystem.  Most of the
  patches are small and obvious.  I took two patches in that are larger
  than I wanted this late in the cycle.

  The first is the hfi1 patch that implements a work queue to test the
  QSFP read state.  I originally rejected the first patch for this
  (which would have place up to 20 seconds worth of udelays in their
  probe routine).  They then rewrote it the way I wanted (use delayed
  work tasks to wait asynchronously up to 20 seconds for the QSFP to
  come alive), so I can't really complain about the size of getting what
  I asked for :-/.

  The second is large because it switches the rcu locking in the debugfs
  code.  Since a locking change like this is done all at once, the size
  it what it is.  It resolves a litany of debug messages from the
  kernel, so I pulled it in for -rc.

  The rest are all typical -rc worthy patches I think.

  There will still be a third -rc pull request from the rdma subsystem
  this release.  I hope to have that one ready to go by the end of this
  week or early next.

  Summary:

   - a smattering of small fixes across the core, ipoib, i40iw, isert,
     cxgb4, and mlx4

   - a slightly larger group of fixes to each of mlx5 and hfi1"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/hfi1: Rework debugfs to use SRCU
  IB/hfi1: Make n_krcvqs be an unsigned long integer
  IB/hfi1: Add QSFP sanity pre-check
  IB/hfi1: Fix AHG KDETH Intr shift
  IB/hfi1: Fix SGE length for misaligned PIO copy
  IB/mlx5: Don't return errors from poll_cq
  IB/mlx5: Use TIR number based on selector
  IB/mlx5: Simplify code by removing return variable
  IB/mlx5: Return EINVAL when caller specifies too many SGEs
  IB/mlx4: Don't return errors from poll_cq
  Revert "IB/mlx4: Return EAGAIN for any error in mlx4_ib_poll_one"
  IB/ipoib: Fix memory corruption in ipoib cm mode connect flow
  IB/core: Fix use after free in send_leave function
  IB/cxgb4: Make _free_qp static to silence build warning
  IB/isert: Properly release resources on DEVICE_REMOVAL
  IB/hfi1: Fix the size parameter to find_first_bit
  IB/mlx5: Fix the size parameter to find_first_bit
  IB/hfi1: Clean up type used and casting
  i40iw: Receive notification events correctly
  i40iw: Update hw_iwarp_state

8 years agolkdtm: adjust usercopy tests to bypass const checks
Kees Cook [Tue, 6 Sep 2016 18:26:12 +0000 (11:26 -0700)] 
lkdtm: adjust usercopy tests to bypass const checks

The hardened usercopy is now consistently avoiding checks against const
sizes, since we really only want to perform runtime bounds checking
on lengths that weren't known at build time. To test the hardened usercopy
code, we must force the length arguments to be seen as non-const.

Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agousercopy: fold builtin_const check into inline function
Kees Cook [Wed, 31 Aug 2016 23:04:21 +0000 (16:04 -0700)] 
usercopy: fold builtin_const check into inline function

Instead of having each caller of check_object_size() need to remember to
check for a const size parameter, move the check into check_object_size()
itself. This actually matches the original implementation in PaX, though
this commit cleans up the now-redundant builtin_const() calls in the
various architectures.

Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agox86/uaccess: force copy_*_user() to be inlined
Kees Cook [Tue, 6 Sep 2016 18:56:01 +0000 (11:56 -0700)] 
x86/uaccess: force copy_*_user() to be inlined

As already done with __copy_*_user(), mark copy_*_user() as __always_inline.
Without this, the checks for things like __builtin_const_p() won't work
consistently in either hardened usercopy nor the recent adjustments for
detecting usercopy overflows at compile time.

The change in kernel text size is detectable, but very small:

 text      data     bss     dec      hex     filename
12118735  5768608 14229504 32116847 1ea106f vmlinux.before
12120207  5768608 14229504 32118319 1ea162f vmlinux.after

Signed-off-by: Kees Cook <keescook@chromium.org>
8 years agoMerge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu...
Linus Torvalds [Tue, 6 Sep 2016 18:15:07 +0000 (11:15 -0700)] 
Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration

Pull mailbox fixes from Jassi Brar:
 "Misc fixes for BCM mailbox driver

   - Fix build warnings by making static functions used within the file.
   - Check for potential NULL before dereferencing
   - Fix link error by defining HAS_DMA dependency"

* 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  fix:mailbox:bcm-pdc-mailbox:mark symbols static where possible
  mailbox: bcm-pdc: potential NULL dereference in pdc_shutdown()
  mailbox: Add HAS_DMA Kconfig dependency to BCM_PDC_MBOX

8 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Tue, 6 Sep 2016 18:06:52 +0000 (11:06 -0700)] 
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is really three fixes, but the SES one comes in a bundle of three
  (making the replacement API available properly, using it and removing
  the non-working one).  The SES problem causes an oops on hpsa devices
  because they attach virtual disks to the host which aren't SAS
  attached (the replacement API ignores them).

  The other two fixes are fairly minor: the sense key one means we
  actually resolve a newly added sense key and the RDAC device
  blacklisting is needed to prevent us annoying the universal XPORT lun
  of various RDAC arrays"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sas: remove is_sas_attached()
  scsi: ses: use scsi_is_sas_rphy instead of is_sas_attached
  scsi: sas: provide stub implementation for scsi_is_sas_rphy
  scsi: blacklist all RDAC devices for BLIST_NO_ULD_ATTACH
  scsi: fix upper bounds check of sense key in scsi_sense_key_string()

8 years agoMerge tag 'regmap-fix-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 6 Sep 2016 18:02:36 +0000 (11:02 -0700)] 
Merge tag 'regmap-fix-v4.8-rc5' of git://git./linux/kernel/git/broonie/regmap

Pull regmap fixes from Mark Brown:
 "Several fixes here, the main one being the change from Lars-Peter
  which I'd been letting soak in -next since the merge window in case it
  uncovered further issues as it's a minimal fix rather than a change
  addressing the root cause of the problems (which would've been too
  invasive for -rc):

   - The biggest change is a fix from Lars-Peter to ensure that we don't
     create overlapping rbtree nodes which in turn avoids returning
     corrupt cache values to users, fixing some issues that were exposed
     by some recent optimisations with certain access patterns but had
     been present for a long time.

   - A fix from Elaine Zhang to stop us updating the cache if we get an
     I/O error when writing to the hardware.

   - A fix fromm Maarten ter Huurne to avoid uninitialized defaults in
     cases where we have non-readable registers but are initializing the
     cache by reading from the device"

* tag 'regmap-fix-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: drop cache if the bus transfer error
  regmap: rbtree: Avoid overlapping nodes
  regmap: cache: Fix num_reg_defaults computation from reg_defaults_raw

8 years agoMerge tag 'spi-fix-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Linus Torvalds [Tue, 6 Sep 2016 17:59:44 +0000 (10:59 -0700)] 
Merge tag 'spi-fix-v4.8-rc5' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "As well as the usual driver fixes there's a couple of non-trivial core
  fixes in here:

   - Fixes for issues reported by Julia Lawall in the changes that were
     sent last time to fix interaction between the bus lock and the
     locking done for the SPI thread.  I'd let this one cook for a while
     to make sure nothing else came up in testing.

   - A fix from Sien Wu for arithmetic overflows when calculating the
     timeout for larger transfers (espcially common with slow buses with
     flashes on them)"

* tag 'spi-fix-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: Prevent unexpected SPI time out due to arithmetic overflow
  spi: pxa2xx-pci: fix ACPI-based enumeration of SPI devices
  MAINTAINERS: add myself as Samsung SPI maintainer
  spi: Drop io_mutex in error paths
  spi: sh-msiof: Avoid invalid clock generator parameters
  spi: img-spfi: Remove spi_master_put in img_spfi_remove()
  spi: mediatek: remove spi_master_put in mtk_spi_remove()
  spi: qup: Remove spi_master_put in spi_qup_remove()

8 years agoMerge tag 'regulator-fix-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 6 Sep 2016 17:43:54 +0000 (10:43 -0700)] 
Merge tag 'regulator-fix-v4.8-rc5' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "Two things here, one an e-mail update for Krzysztof Kozlowski and the
  other a couple of fixes for issues with incorrectly described voltages
  in a couple of the Qualcomm regulator drivers that were breaking MMC
  on some platforms"

* tag 'regulator-fix-v4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: Change Krzysztof Kozlowski's email to kernel.org
  regulator: qcom_smd: Fix voltage ranges for pma8084 ftsmps and pldo
  regulator: qcom_smd: Fix voltage ranges for pm8x41

8 years agoMerge tag 'pinctrl-v4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Tue, 6 Sep 2016 17:36:12 +0000 (10:36 -0700)] 
Merge tag 'pinctrl-v4.8-3' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
 "Nothing special at all, just three SoC-specific driver fixes:

   - Fix routing problems in pistachio (Imagination) and sunxi
     (AllWinner)

   - Fix an interrupt problem in the Cherryview (Intel)"

* tag 'pinctrl-v4.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: sunxi: fix uart1 CTS/RTS pins at PG on A23/A33
  pinctrl: cherryview: Do not mask all interrupts in probe
  pinctrl: pistachio: fix mfio pll_lock pinmux

8 years agothermal: rcar_thermal: Fix priv->zone error handling
Dirk Behme [Thu, 21 Apr 2016 10:24:55 +0000 (12:24 +0200)] 
thermal: rcar_thermal: Fix priv->zone error handling

In case thermal_zone_xxx_register() returns an error, priv->zone
isn't NULL any more, but contains the error code.

This is passed to thermal_zone_device_unregister(), then. This checks
for priv->zone being NULL, but the error code is != NULL. So it works
with the error code as a pointer. Crashing immediately.

To fix this, reset priv->zone to NULL before entering
rcar_gen3_thermal_remove().

Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
8 years agoMerge remote-tracking branches 'spi/fix/lock', 'spi/fix/maintainers', 'spi/fix/put...
Mark Brown [Tue, 6 Sep 2016 11:32:09 +0000 (12:32 +0100)] 
Merge remote-tracking branches 'spi/fix/lock', 'spi/fix/maintainers', 'spi/fix/put', 'spi/fix/pxa2xx', 'spi/fix/sh-msiof' and 'spi/fix/timeout' into spi-linus

8 years agoMerge remote-tracking branches 'regulator/fix/email' and 'regulator/fix/qcom-smd...
Mark Brown [Tue, 6 Sep 2016 11:31:34 +0000 (12:31 +0100)] 
Merge remote-tracking branches 'regulator/fix/email' and 'regulator/fix/qcom-smd' into regulator-linus

8 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Mon, 5 Sep 2016 18:10:00 +0000 (11:10 -0700)] 
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This fixes a regression in the cryptd code that breaks certain
  accelerated AED algorithms as well as an older regression in the
  caam driver that breaks IPsec"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: caam - fix IV loading for authenc (giv)decryption
  crypto: cryptd - Use correct tfm object for AEAD tracking

8 years agoMerge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Mon, 5 Sep 2016 17:55:55 +0000 (10:55 -0700)] 
Merge branch 'rc-fixes' of git://git./linux/kernel/git/mmarek/kbuild

Pull kbuild fix from Michal Marek:
 "Fix for 'make deb-pkg'.  The bug got introduced in v4.8-rc1"

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  builddeb: Skip gcc-plugins when not configured

8 years agoceph: do not modify fi->frag in need_reset_readdir()
Nicolas Iooss [Sun, 28 Aug 2016 16:47:12 +0000 (18:47 +0200)] 
ceph: do not modify fi->frag in need_reset_readdir()

Commit f3c4ebe65ea1 ("ceph: using hash value to compose dentry offset")
modified "if (fpos_frag(new_pos) != fi->frag)" to "if (fi->frag |=
fpos_frag(new_pos))" in need_reset_readdir(), thus replacing a
comparison operator with an assignment one.

This looks like a typo which is reported by clang when building the
kernel with some warning flags:

    fs/ceph/dir.c:600:22: error: using the result of an assignment as a
    condition without parentheses [-Werror,-Wparentheses]
            } else if (fi->frag |= fpos_frag(new_pos)) {
                       ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
    fs/ceph/dir.c:600:22: note: place parentheses around the assignment
    to silence this warning
            } else if (fi->frag |= fpos_frag(new_pos)) {
                                ^
                       (                             )
    fs/ceph/dir.c:600:22: note: use '!=' to turn this compound
    assignment into an inequality comparison
            } else if (fi->frag |= fpos_frag(new_pos)) {
                                ^~
                                !=

Fixes: f3c4ebe65ea1 ("ceph: using hash value to compose dentry offset")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
8 years agoARM: dts: imx6qdl: Fix SPDIF regression
Fabio Estevam [Wed, 31 Aug 2016 13:56:48 +0000 (10:56 -0300)] 
ARM: dts: imx6qdl: Fix SPDIF regression

Commit 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
changed many more clocks than only the SPDIF core clock as stated in
the commit message.

The MLB clock has been added and this causes SPDIF regression as
reported by Xavi Drudis Ferran and also in this forum post:
https://forum.digikey.com/thread/34240

The MX6Q Reference Manual does not mention that MLB is a clock related
to SPDIF, so change it back to a dummy clock to restore SPDIF
functionality.

Thanks to Ambika for providing the fix at:
https://community.nxp.com/thread/387131

Fixes: 833f2cbf7091 ("ARM: dts: imx6: change the core clock of spdif")
Cc: <stable@vger.kernel.org> # 4.4.x
Reported-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
8 years agoLinux 4.8-rc5
Linus Torvalds [Sun, 4 Sep 2016 21:31:46 +0000 (14:31 -0700)] 
Linux 4.8-rc5

8 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Sep 2016 15:45:41 +0000 (08:45 -0700)] 
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fix from Thomas Gleixner:
 "A single fix for an AMD erratum so machines without a BIOS fix work"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/AMD: Apply erratum 665 on machines without a BIOS fix

8 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 4 Sep 2016 15:43:45 +0000 (08:43 -0700)] 
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "Two fixlet from the timers departement:

   - A fix for scheduler stalls in the tick idle code affecting
     NOHZ_FULL kernels

   - A trivial compile fix"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tick/nohz: Fix softlockup on scheduler stalls in kvm guest
  clocksource/drivers/atmel-pit: Fix compilation error

8 years agoMerge tag 'dm-4.8-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Sun, 4 Sep 2016 00:29:58 +0000 (17:29 -0700)] 
Merge tag 'dm-4.8-fixes-4' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - a stable fix in both DM crypt and DM log-writes for too large bios
   (as generated by bcache)

 - two other stable fixes for DM log-writes

 - a stable fix for a DM crypt bug that could result in freeing pointers
   from uninitialized memory in the tfm allocation error path

 - a DM bufio cleanup to discontinue using create_singlethread_workqueue()

* tag 'dm-4.8-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm bufio: remove use of deprecated create_singlethread_workqueue()
  dm crypt: fix free of bad values after tfm allocation failure
  dm crypt: fix error with too large bios
  dm log writes: fix check of kthread_run() return value
  dm log writes: fix bug with too large bios
  dm log writes: move IO accounting earlier to fix error path

8 years agoMerge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
Linus Torvalds [Sat, 3 Sep 2016 19:40:45 +0000 (12:40 -0700)] 
Merge branch 'for-linus-4.8' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "I'm still prepping a set of fixes for btrfs fsync, just nailing down a
  hard to trigger memory corruption.  For now, these are tested and ready."

* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs: fix one bug that process may endlessly wait for ticket in wait_reserve_ticket()
  Btrfs: fix endless loop in balancing block groups
  Btrfs: kill invalid ASSERT() in process_all_refs()

8 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 3 Sep 2016 19:31:37 +0000 (12:31 -0700)] 
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:
 "arm64 and arm/perf fixes:

   - arm64 fix: debug exception unmasking on the CPU resume path

   - ARM PMU fixes: memory leak on error path and NULL pointer
     dereference"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: kernel: Fix unmasked debug exceptions when restoring mdscr_el1
  drivers/perf: arm_pmu: Fix NULL pointer dereference during probe
  drivers/perf: arm_pmu: Fix leak in error path

8 years agoMerge tag 'char-misc-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 3 Sep 2016 18:38:43 +0000 (11:38 -0700)] 
Merge tag 'char-misc-4.8-rc5' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are a number of small driver fixes for 4.8-rc5.

  The largest thing here is deleting an obsolete driver,
  drivers/misc/bh1780gli.c, as the functionality of it was replaced by
  an iio driver a while ago.

  The other fixes are things that have been reported, or reverts of
  broken stuff (the binder change).  All of these changes have been in
  linux-next for a while with no reported issues"

* tag 'char-misc-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  thunderbolt: Don't declare Falcon Ridge unsupported
  thunderbolt: Add support for INTEL_FALCON_RIDGE_2C controller.
  thunderbolt: Fix resume quirk for Falcon Ridge 4C.
  lkdtm: Mark lkdtm_rodata_do_nothing() notrace
  mei: me: disable driver on SPT SPS firmware
  Revert "android: binder: fix dangling pointer comparison"
  drivers/iio/light/Kconfig: SENSORS_BH1780 cleanup
  android: binder: fix dangling pointer comparison
  misc: delete bh1780 driver

8 years agoMerge tag 'driver-core-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 3 Sep 2016 18:36:55 +0000 (11:36 -0700)] 
Merge tag 'driver-core-4.8-rc5' of git://git./linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are three small fixes for 4.8-rc5.

  One for sysfs, one for kernfs, and one documentation fix, all for
  reported issues.  All of these have been in linux-next for a while"

* tag 'driver-core-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  sysfs: correctly handle read offset on PREALLOC attrs
  documentation: drivers/core/of: fix name of of_node symlink
  kernfs: don't depend on d_find_any_alias() when generating notifications

8 years agoMerge tag 'staging-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 3 Sep 2016 18:33:33 +0000 (11:33 -0700)] 
Merge tag 'staging-4.8-rc5' of git://git./linux/kernel/git/gregkh/staging

Pull staging/IIO driver fixes from Greg KH:
 "Here are a number of small fixes for staging and IIO drivers that
  resolve reported problems.

  Full details are in the shortlog.  All of these have been in
  linux-next with no reported issues"

* tag 'staging-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (35 commits)
  arm: dts: rockchip: add reset node for the exist saradc SoCs
  arm64: dts: rockchip: add reset saradc node for rk3368 SoCs
  iio: adc: rockchip_saradc: reset saradc controller before programming it
  iio: accel: kxsd9: Fix raw read return
  iio: adc: ti_am335x_adc: Increase timeout value waiting for ADC sample
  iio: adc: ti_am335x_adc: Protect FIFO1 from concurrent access
  include/linux: fix excess fence.h kernel-doc notation
  staging: wilc1000: correctly check if associatedsta has not been found
  staging: wilc1000: NULL dereference on error
  staging: wilc1000: txq_event: Fix coding error
  MAINTAINERS: Add file patterns for ion device tree bindings
  MAINTAINERS: Update maintainer entry for wilc1000
  iio: chemical: atlas-ph-sensor: fix typo in val assignment
  iio: fix sched WARNING "do not call blocking ops when !TASK_RUNNING"
  staging: comedi: ni_mio_common: fix AO inttrig backwards compatibility
  staging: comedi: dt2811: fix a precedence bug
  staging: comedi: adv_pci1760: Do not return EINVAL for CMDF_ROUND_DOWN.
  staging: comedi: ni_mio_common: fix wrong insn_write handler
  staging: comedi: comedi_test: fix timer race conditions
  staging: comedi: daqboard2000: bug fix board type matching code
  ...

8 years agoMerge tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sat, 3 Sep 2016 18:29:31 +0000 (11:29 -0700)] 
Merge tag 'tty-4.8-rc5' of git://git./linux/kernel/git/gregkh/tty

Pull serial driver fixes from Greg KH:
 "Here are some small serial driver fixes for 4.8-rc5.  One fixes an
  oft-reported build issue with the fintek driver, another reverts a
  patch that was causing problems, one fixes a crash, and some new
  device ids were added.

  All of these have been in linux-next for a while"

* tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250: added acces i/o products quad and octal serial cards
  serial: 8250_mid: fix divide error bug if baud rate is 0
  Revert "tty/serial/8250: use mctrl_gpio helpers"
  8250/fintek: rename IRQ_MODE macro

8 years agoMerge tag 'usb-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 3 Sep 2016 18:24:23 +0000 (11:24 -0700)] 
Merge tag 'usb-4.8-rc5' of git://git./linux/kernel/git/gregkh/usb

Pull USB/PHY fixes from Greg KH:
 "Here are some USB and PHY driver fixes for 4.8-rc5

  Nothing major, lots of little fixes for reported bugs, and a build fix
  for a missing .h file that the phy drivers needed.  All of these have
  been in linux-next for a while with no reported issues"

* tag 'usb-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (24 commits)
  usb: musb: Fix locking errors for host only mode
  usb: dwc3: gadget: always decrement by 1
  usb: dwc3: debug: fix ep name on trace output
  usb: gadget: udc: core: don't starve DMA resources
  USB: serial: option: add WeTelecom 0x6802 and 0x6803 products
  USB: avoid left shift by -1
  USB: fix typo in wMaxPacketSize validation
  usb: gadget: Add the gserial port checking in gs_start_tx()
  usb: dwc3: gadget: don't rely on jiffies while holding spinlock
  usb: gadget: fsl_qe_udc: signedness bug in qe_get_frame()
  usb: gadget: function: f_rndis: socket buffer may be NULL
  usb: gadget: function: f_eem: socket buffer may be NULL
  usb: renesas_usbhs: gadget: fix return value check in usbhs_mod_gadget_probe()
  usb: dwc2: Add reset control to dwc2
  usb: dwc3: core: allow device to runtime_suspend several times
  usb: dwc3: pci: runtime_resume child device
  USB: serial: option: add WeTelecom WM-D200
  usb: chipidea: udc: don't touch DP when controller is in host mode
  USB: serial: mos7840: fix non-atomic allocation in write path
  USB: serial: mos7720: fix non-atomic allocation in write path
  ...

8 years agodevpts: return NULL pts 'priv' entry for non-devpts nodes
Linus Torvalds [Sat, 3 Sep 2016 18:02:50 +0000 (11:02 -0700)] 
devpts: return NULL pts 'priv' entry for non-devpts nodes

In commit 8ead9dd54716 ("devpts: more pty driver interface cleanups") I
made devpts_get_priv() just return the dentry->fs_data directly.  And
because I thought it wouldn't happen, I added a warning if you ever saw
a pts node that wasn't on devpts.

And no, that warning never triggered under any actual real use, but you
can trigger it by creating nonsensical pts nodes by hand.

So just revert the warning, and make devpts_get_priv() return NULL for
that case like it used to.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: stable@vger.kernel.org # 4.6+
Cc: Eric W Biederman" <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
8 years agoMerge remote-tracking branch 'regmap/fix/rbtree' into regmap-linus
Mark Brown [Sat, 3 Sep 2016 11:10:09 +0000 (12:10 +0100)] 
Merge remote-tracking branch 'regmap/fix/rbtree' into regmap-linus

8 years agoMerge remote-tracking branch 'regmap/fix/cache' into regmap-linus
Mark Brown [Sat, 3 Sep 2016 11:10:08 +0000 (12:10 +0100)] 
Merge remote-tracking branch 'regmap/fix/cache' into regmap-linus

8 years agospi: Prevent unexpected SPI time out due to arithmetic overflow
Sien Wu [Thu, 1 Sep 2016 23:24:29 +0000 (18:24 -0500)] 
spi: Prevent unexpected SPI time out due to arithmetic overflow

When reading SPI flash as MTD device, the transfer length is
directly passed to the spi driver. If the requested data size
exceeds 512KB, it will cause the time out calculation to
overflow since transfer length is 32-bit unsigned integer.
This issue is resolved by using 64-bit unsigned integer
to perform the arithmetic.

Signed-off-by: Sien Wu <sien.wu@ni.com>
Acked-by: Brad Keryan <brad.keryan@ni.com>
Acked-by: Gratian Crisan <gratian.crisan@ni.com>
Acked-by: Brad Mouring <brad.mouring@ni.com>
Natinst-ReviewBoard-ID 150232
Signed-off-by: Mark Brown <broonie@kernel.org>
8 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 3 Sep 2016 04:05:38 +0000 (21:05 -0700)] 
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A collection of fixes for the nvme over fabrics code"

* 'for-linus' of git://git.kernel.dk/linux-block:
  nvme-rdma: Get rid of redundant defines
  nvme-rdma: Get rid of duplicate variable
  nvme: fabrics drivers don't need the nvme-pci driver
  nvme-fabrics: get a reference when reusing a nvme_host structure
  nvme-fabrics: change NQN UUID to big-endian format
  nvme-loop: set sqsize to 0-based value, per spec
  nvme-rdma: fix sqsize/hsqsize per spec
  fabrics: define admin sqsize min default, per spec
  nvmet-rdma: +1 to *queue_size from hsqsize/hrqsize
  nvmet-rdma: Fix use after free
  nvme-rdma: initialize ret to zero to avoid returning garbage

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Fri, 2 Sep 2016 22:33:54 +0000 (15:33 -0700)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security

Pull TPM bugfix from James Morris.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  tpm: invalid self test error message

8 years agotpm: invalid self test error message
Jarkko Sakkinen [Thu, 1 Sep 2016 23:36:58 +0000 (02:36 +0300)] 
tpm: invalid self test error message

The driver emits invalid self test error message even though the init
succeeds.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Fixes: cae8b441fc20 ("tpm: Factor out common startup code")
Reviewed-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
8 years agoMerge tag 'acpi-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 2 Sep 2016 22:16:04 +0000 (15:16 -0700)] 
Merge tag 'acpi-4.8-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes ffrom Rafael Wysocki:
 "Two stable-candidate fixes for the ACPI early device probing code
  added during the 4.4 cycle, one fixing a typo in a stub macro used
  when CONFIG_ACPI is unset and one that prevents sleeping functions
  from being called under a spinlock (Lorenzo Pieralisi)"

* tag 'acpi-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / drivers: replace acpi_probe_lock spinlock with mutex
  ACPI / drivers: fix typo in ACPI_DECLARE_PROBE_ENTRY macro

8 years agoMerge tag 'pm-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 2 Sep 2016 22:07:41 +0000 (15:07 -0700)] 
Merge tag 'pm-4.8-rc5' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "This includes a stable-candidate cpufreq-dt driver problem fix and
  annotations of tracepoints in the runtime PM framework.

  Specifics:

   - Fix the definition of the cpufreq-dt driver's machines table
     introduced during the 4.7 cycle that should be NULL-terminated, but
     the termination entry is missing from it (Wei Yongjun).

   - Annotate tracepoints in the runtime PM framework's core so as to
     allow the functions containing them to be called from the idle code
     path without causing RCU to complain about illegal usage (Paul
     McKenney)"

* tag 'pm-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / runtime: Add _rcuidle suffix to allow rpm_idle() use from idle
  PM / runtime: Add _rcuidle suffix to allow rpm_resume() to be called from idle
  cpufreq: dt: Add terminate entry for of_device_id tables

8 years agoMerge branches 'pm-cpufreq-fixes' and 'pm-core-fixes'
Rafael J. Wysocki [Fri, 2 Sep 2016 20:38:30 +0000 (22:38 +0200)] 
Merge branches 'pm-cpufreq-fixes' and 'pm-core-fixes'

* pm-cpufreq-fixes:
  cpufreq: dt: Add terminate entry for of_device_id tables

* pm-core-fixes:
  PM / runtime: Add _rcuidle suffix to allow rpm_idle() use from idle
  PM / runtime: Add _rcuidle suffix to allow rpm_resume() to be called from idle

8 years agoACPI / drivers: replace acpi_probe_lock spinlock with mutex
Lorenzo Pieralisi [Tue, 16 Aug 2016 15:59:53 +0000 (16:59 +0100)] 
ACPI / drivers: replace acpi_probe_lock spinlock with mutex

Commit e647b532275b ("ACPI: Add early device probing infrastructure")
introduced code that allows inserting driver specific
struct acpi_probe_entry probe entries into ACPI linker sections
(one per-subsystem, eg irqchip, clocksource) that are then walked
to retrieve the data and function hooks required to probe the
respective kernel components.

Probing for all entries in a section is triggered through
the __acpi_probe_device_table() function, that in turn, according
to the table ID a given probe entry reports parses the table
with the function retrieved from the respective section structures
(ie struct acpi_probe_entry). Owing to the current ACPI table
parsing implementation, the __acpi_probe_device_table() function
has to share global variables with the acpi_match_madt() function, so
in order to guarantee mutual exclusion locking is required
between the two functions.

Current kernel code implements the locking through the acpi_probe_lock
spinlock; this has the side effect of requiring all code called
within the lock (ie struct acpi_probe_entry.probe_{table/subtbl} hooks)
not to sleep.

However, kernel subsystems that make use of the early probing
infrastructure are relying on kernel APIs that may sleep (eg
irq_domain_alloc_fwnode(), among others) in the function calls
pointed at by struct acpi_probe_entry.{probe_table/subtbl} entries
(eg gic_v2_acpi_init()), which is a bug.

Since __acpi_probe_device_table() is called from context
that is allowed to sleep the acpi_probe_lock spinlock can be replaced
with a mutex; this fixes the issue whilst still guaranteeing
mutual exclusion.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Fixes: e647b532275b (ACPI: Add early device probing infrastructure)
Cc: 4.4+ <stable@vger.kernel.org> # 4.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agoACPI / drivers: fix typo in ACPI_DECLARE_PROBE_ENTRY macro
Lorenzo Pieralisi [Tue, 16 Aug 2016 15:59:52 +0000 (16:59 +0100)] 
ACPI / drivers: fix typo in ACPI_DECLARE_PROBE_ENTRY macro

When the ACPI_DECLARE_PROBE_ENTRY macro was added in
commit e647b532275b ("ACPI: Add early device probing infrastructure"),
a stub macro adding an unused entry was added for the !CONFIG_ACPI
Kconfig option case to make sure kernel code making use of the
macro did not require to be guarded within CONFIG_ACPI in order to
be compiled.

The stub macro was never used since all kernel code that defines
ACPI_DECLARE_PROBE_ENTRY entries is currently guarded within
CONFIG_ACPI; it contains a typo that should be nonetheless fixed.

Fix the typo in the stub (ie !CONFIG_ACPI) ACPI_DECLARE_PROBE_ENTRY()
macro so that it can actually be used if needed.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Fixes: e647b532275b (ACPI: Add early device probing infrastructure)
Cc: 4.4+ <stable@vger.kernel.org> # 4.4+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
8 years agox86/AMD: Apply erratum 665 on machines without a BIOS fix
Emanuel Czirai [Fri, 2 Sep 2016 05:35:50 +0000 (07:35 +0200)] 
x86/AMD: Apply erratum 665 on machines without a BIOS fix

AMD F12h machines have an erratum which can cause DIV/IDIV to behave
unpredictably. The workaround is to set MSRC001_1029[31] but sometimes
there is no BIOS update containing that workaround so let's do it
ourselves unconditionally. It is simple enough.

[ Borislav: Wrote commit message. ]

Signed-off-by: Emanuel Czirai <icanrealizeum@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Yaowu Xu <yaowu@google.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20160902053550.18097-1-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
8 years agoIB/hfi1: Rework debugfs to use SRCU
Mike Marciniszyn [Wed, 31 Aug 2016 14:24:46 +0000 (07:24 -0700)] 
IB/hfi1: Rework debugfs to use SRCU

The debugfs RCU trips many debug kernel warnings because of potential
sleeps with an RCU read lock held. This includes both user copy calls
and slab allocations throughout the file.

This patch switches the RCU to use SRCU for file remove/access
race protection.

In one case, the SRCU is implicit in the use of the raw debugfs file
object and just works.

In the seq_file case, a wrapper around seq_read() and seq_lseek() is
used to enforce the SRCU using the debugfs supplied functions
debugfs_use_file_start() and debugfs_use_file_stop().

The sychronize_rcu() is deleted since the SRCU prevents the remove
access race.

The RCU locking is kept for qp_stats since the QP hash list is
protected using the non-sleepable RCU.

Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/hfi1: Make n_krcvqs be an unsigned long integer
Harish Chegondi [Wed, 31 Aug 2016 14:24:40 +0000 (07:24 -0700)] 
IB/hfi1: Make n_krcvqs be an unsigned long integer

The global variable n_krcvqs stores the sum of the number of kernel
receive queues of VLs 0-7 which the user can pass to the driver through
the module parameter array krcvqs which is of type unsigned integer. If
the user passes large value(s) into krcvqs parameter array, it can cause
an arithmetic overflow while calculating n_krcvqs which is also of type
unsigned int. The overflow results in an incorrect value of n_krcvqs
which can lead to kernel crash while loading the driver.

Fix by changing the data type of n_krcvqs to unsigned long. This patch
also changes the data type of other variables that get their values from
n_krcvqs.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/hfi1: Add QSFP sanity pre-check
Dean Luick [Wed, 31 Aug 2016 14:24:33 +0000 (07:24 -0700)] 
IB/hfi1: Add QSFP sanity pre-check

Sometimes a QSFP device does not respond in the expected time
after a power-on.  Add a read pre-check/retry when starting
the link on driver load.

Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/hfi1: Fix AHG KDETH Intr shift
Jubin John [Wed, 31 Aug 2016 14:24:27 +0000 (07:24 -0700)] 
IB/hfi1: Fix AHG KDETH Intr shift

In the set_txreq_header_ahg(), The KDETH Intr bit is obtained from the
header in the user sdma request using a KDETH_GET shift and mask macro.
This value is then futher right shifted by 16 causing us to lose the
value i.e it is shifted to zero, leading to the following
smatch warning:
drivers/infiniband/hw/hfi1/user_sdma.c:1482 set_txreq_header_ahg()
warn: mask and shift to zero

The Intr bit should be left shifted into its correct position in the
KDETH header before the AHG update.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com>
Reviewed-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/hfi1: Fix SGE length for misaligned PIO copy
Sebastian Sanchez [Wed, 31 Aug 2016 14:24:20 +0000 (07:24 -0700)] 
IB/hfi1: Fix SGE length for misaligned PIO copy

When trying to align the source pointer and there's a byte carry
in an SGE copy, bytes are borrowed from the next quad-word X to
complete the required quad-word copy. Then, the SGE length is
reduced by the number of borrowed bytes. After this, if the
remaining number of bytes from quad-word X (extra bytes) is
greater than the new SGE length, the number of extra bytes needs
to be updated to the new SGE length. Otherwise, when the
SGE length gets updated again after the extra bytes are read to
create the new byte carry, it goes negative, which then becomes
a very large number as the SGE length is an unsigned integer.
This causes SGE buffer to be over-read.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/mlx5: Don't return errors from poll_cq
Leon Romanovsky [Sun, 28 Aug 2016 07:58:38 +0000 (10:58 +0300)] 
IB/mlx5: Don't return errors from poll_cq

Remove returning errors from mlx5 poll_cq function. Polling CQ
operation in kernel never fails by Mellanox HCA architecture and
respective driver design.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/mlx5: Use TIR number based on selector
Yishai Hadas [Sun, 28 Aug 2016 07:58:37 +0000 (10:58 +0300)] 
IB/mlx5: Use TIR number based on selector

Use TIR number based on selector, it should be done to differentiate
between RSS QP to RAW one.

Reported-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Tested-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
8 years agoIB/mlx5: Simplify code by removing return variable
Leon Romanovsky [Sun, 28 Aug 2016 07:58:35 +0000 (10:58 +0300)] 
IB/mlx5: Simplify code by removing return variable

Return variable was set in a line before the
actual return was called in begin_wqe function.

This patch removes such variable and simplifies the code.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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