firefly-linux-kernel-4.4.55.git
11 years agoperf kvm: Fix segfault with report and mixed guestmount use
David Ahern [Mon, 2 Jul 2012 15:12:57 +0000 (09:12 -0600)]
perf kvm: Fix segfault with report and mixed guestmount use

Using the guestmount option on record:
    $ perf kvm --guest --host --guestmount=/tmp/guest-mount record -ag

But not the subsequent report:
    $ perf kvm report

causes a SEGFAULT in the usual place:
(gdb) bt
0  0x0000000000470356 in machine__mmap_name (self=0x0, bf=0x7fffffffbdb0 " z\370\367\377\177", size=
    4096) at util/map.c:712
1  0x00000000004453e8 in perf_event__process_kernel_mmap (tool=0x7fffffffde10, event=0x7ffff7f87e38,
    machine=0x0) at util/event.c:550
2  0x00000000004458c9 in perf_event__process_mmap (tool=0x7fffffffde10, event=0x7ffff7f87e38, sample=
    0x7fffffffd2a0, machine=0x0) at util/event.c:656
3  0x00000000004733e0 in perf_session_deliver_event (session=0x91aca0, event=0x7ffff7f87e38, sample=
    0x7fffffffd2a0, tool=0x7fffffffde10, file_offset=7736) at util/session.c:979
...

The MMAP events in this case already contain the full path to the
module. No need to require it for the report path to.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1341241977-71535-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
11 years agoperf kvm: Fix regression with guest machine creation
David Ahern [Sun, 1 Jul 2012 22:11:37 +0000 (16:11 -0600)]
perf kvm: Fix regression with guest machine creation

Commit 743eb868657bdb1b26c7b24077ca21c67c82c777 reworked when the
machines were created. Prior to this commit guest machines could be
created in perf_event__process_kernel_mmap() while processing kernel
MMAP events. This commit assumes that the machines exist by the time
perf_session_deliver_event is called (e.g., during processing of build
id events) - which is not always correct.

One example is the use of default guest args (--guestkallsyms and
--guestmodules) for short times where no samples hit within a guest
module. For this case no build id is added to the file header. No build
id == no machine created. That leads to the next example -- the use of
no-buildid (-B) on the record for all perf-kvm invocations. In both
cases perf report dies with a SEGFAULT of the form:

(gdb) bt
0  0x000000000046dd7b in machine__mmap_name (self=0x0, bf=0x7fffffffbd20 "q\021", size=4096) at util/map.c:715
1  0x0000000000444161 in perf_event__process_kernel_mmap (tool=0x7fffffffdd80, event=0x7ffff7fb4120, machine=0x0) at util/event.c:562
2  0x0000000000444642 in perf_event__process_mmap (tool=0x7fffffffdd80, event=0x7ffff7fb4120, sample=0x7fffffffd210, machine=0x0)
    at util/event.c:668
3  0x0000000000470e0b in perf_session_deliver_event (session=0x915ca0, event=0x7ffff7fb4120, sample=0x7fffffffd210, tool=0x7fffffffdd80,
    file_offset=8480) at util/session.c:979
4  0x000000000047032e in flush_sample_queue (s=0x915ca0, tool=0x7fffffffdd80) at util/session.c:679
5  0x0000000000471c8d in __perf_session__process_events (session=0x915ca0, data_offset=400, data_size=150448, file_size=150848, tool=
    0x7fffffffdd80) at util/session.c:1363
6  0x0000000000471d42 in perf_session__process_events (self=0x915ca0, tool=0x7fffffffdd80) at util/session.c:1379
7  0x000000000042484a in __cmd_report (rep=0x7fffffffdd80) at builtin-report.c:368
8  0x0000000000425bf1 in cmd_report (argc=0, argv=0x915b00, prefix=0x0) at builtin-report.c:756
9  0x0000000000438505 in __cmd_report (argc=4, argv=0x7fffffffe260) at builtin-kvm.c:84
10 0x000000000043882a in cmd_kvm (argc=4, argv=0x7fffffffe260, prefix=0x0) at builtin-kvm.c:131
11 0x00000000004152cd in run_builtin (p=0x7a54e8, argc=9, argv=0x7fffffffe260) at perf.c:273
12 0x00000000004154c7 in handle_internal_command (argc=9, argv=0x7fffffffe260) at perf.c:345
13 0x0000000000415613 in run_argv (argcp=0x7fffffffe14c, argv=0x7fffffffe140) at perf.c:389
14 0x0000000000415899 in main (argc=9, argv=0x7fffffffe260) at perf.c:487

Fix by allowing the machine to be created in perf_session_deliver_event.

Tested with --guestmount option and default guest args, with and without
-B arg on record for both and for short (10 seconds) and long (10
minutes) windows.

Reported-by: Pradeep Kumar Surisetty <psuriset@linux.vnet.ibm.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Pradeep Kumar Surisetty <psuriset@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/1341180697-64515-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
11 years agoperf script: Fix format regression due to libtraceevent merge
David Ahern [Thu, 14 Jun 2012 18:36:17 +0000 (12:36 -0600)]
perf script: Fix format regression due to libtraceevent merge

Consider the commands:
    perf record -e sched:sched_switch -fo /tmp/perf.data  -a -- sleep 1
    perf script -i /tmp/perf.data

In v3.4 the output has the form (lines wrapped here)
    perf 29214 [005] 821043.582596: sched_switch:
prev_comm=perf prev_pid=29214 prev_prio=120
prev_state=S ==> next_comm=swapper/5 next_pid=0 next_prio=120

In 3.5 that same line has become:
    perf 29214 [005] 821043.582596: sched_switch:
<...>-29214 [005]     0.000000000: sched_switch:
prev_comm=perf prev_pid=29214 prev_prio=120
prev_state=S ==> next_comm=swapper/5 next_pid=0 next_prio=120

Note the duplicates in the output -- pid, cpu, event name. With
this patch the v3.4 output is restored:
    perf 29214 [005] 821043.582596: sched_switch:
prev_comm=perf prev_pid=29214 prev_prio=120
prev_state=S ==> next_comm=swapper/5 next_pid=0 next_prio=120

v3:
Remove that pesky newline too. Output now matches v3.4 (pre-libtracevent).

v2:
Change print_trace_event function local to perf per Steve's comments.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1339698977-68962-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
12 years agoMerge branch 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile...
Ingo Molnar [Sun, 24 Jun 2012 17:08:49 +0000 (19:08 +0200)]
Merge branch 'urgent' of git://git./linux/kernel/git/rric/oprofile into perf/urgent

Pull a oprofile fix from Robert Richter.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Sat, 23 Jun 2012 00:47:08 +0000 (17:47 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

Pull Ceph fixes from Sage Weil:
 "There are a couple of fixes from Yan for bad pointer dereferences in
  the messenger code and when fiddling with page->private after page
  migration, a fix from Alex for a use-after-free in the osd client
  code, and a couple fixes for the message refcounting and shutdown
  ordering."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  libceph: flush msgr queue during mon_client shutdown
  rbd: Clear ceph_msg->bio_iter for retransmitted message
  libceph: use con get/put ops from osd_client
  libceph: osd_client: don't drop reply reference too early
  ceph: check PG_Private flag before accessing page->private

12 years agoMerge tag 'for-linus-Jun-21-2012' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Fri, 22 Jun 2012 18:07:55 +0000 (11:07 -0700)]
Merge tag 'for-linus-Jun-21-2012' of git://oss.sgi.com/xfs/xfs

Pull XFS fixes from Ben Myers:
 - Fix stale data exposure with unwritten extents
 - Fix a warning in xfs_alloc_vextent with ODEBUG
 - Fix overallocation and alignment of pages for xfs_bufs
 - Fix a cursor leak
 - Fix a log hang
 - Fix a crash related to xfs_sync_worker
 - Rename xfs log structure from struct log to struct xlog so we can use
   crash dumps effectively

* tag 'for-linus-Jun-21-2012' of git://oss.sgi.com/xfs/xfs:
  xfs: rename log structure to xlog
  xfs: shutdown xfs_sync_worker before the log
  xfs: Fix overallocation in xfs_buf_allocate_memory()
  xfs: fix allocbt cursor leak in xfs_alloc_ag_vextent_near
  xfs: check for stale inode before acquiring iflock on push
  xfs: fix debug_object WARN at xfs_alloc_vextent()
  xfs: xfs_vm_writepage clear iomap_valid when !buffer_uptodate (REV2)

12 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 22 Jun 2012 17:58:57 +0000 (10:58 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf updates from Ingo Molnar.

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ftrace: Make all inline tags also include notrace
  perf: Use css_tryget() to avoid propping up css refcount
  perf tools: Fix synthesizing tracepoint names from the perf.data headers
  perf stat: Fix default output file
  perf tools: Fix endianity swapping for adds_features bitmask

12 years agoMerge tag 'nfs-for-3.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Thu, 21 Jun 2012 23:05:43 +0000 (16:05 -0700)]
Merge tag 'nfs-for-3.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 - Fix a write hang due to an uninitalised variable when
   !defined(CONFIG_NFS_V4)
 - Address upcall races in the legacy NFSv4 idmapper
 - Remove an O_DIRECT refcounting issue
 - Fix a pNFS refcounting bug when the file layout metadata server is
   also acting as a data server
 - Fix a pNFS module loading race.

* tag 'nfs-for-3.5-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: Force the legacy idmapper to be single threaded
  NFS: Initialise commit_info.rpc_out when !defined(CONFIG_NFS_V4)
  NFS: Fix a refcounting issue in O_DIRECT
  NFSv4.1: Fix a race in set_pnfs_layoutdriver
  NFSv4.1: Fix umount when filelayout DS is also the MDS

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Thu, 21 Jun 2012 20:41:07 +0000 (13:41 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "This is a small pull with btrfs fixes.  The biggest of the bunch is
  another fix for the new backref walking code.

  We're still hammering out one btrfs dio vs buffered reads problem, but
  that one will have to wait for the next rc."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: delay iput with async extents
  Btrfs: add a missing spin_lock
  Btrfs: don't assume to be on the correct extent in add_all_parents
  Btrfs: introduce btrfs_next_old_item

12 years agoMerge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck...
Linus Torvalds [Thu, 21 Jun 2012 20:40:40 +0000 (13:40 -0700)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
 "Two minor fixes in emc2103 and applesmc drivers."

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (emc2103) Fix use of an uninitilized variable in error case
  hwmon: (applesmc) Limit key length in warning messages

12 years agoxfs: rename log structure to xlog
Mark Tinguely [Thu, 14 Jun 2012 14:22:15 +0000 (09:22 -0500)]
xfs: rename log structure to xlog

Rename the XFS log structure to xlog to help crash distinquish it from the
other logs in Linux.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
12 years agoxfs: shutdown xfs_sync_worker before the log
Ben Myers [Fri, 25 May 2012 20:45:36 +0000 (15:45 -0500)]
xfs: shutdown xfs_sync_worker before the log

Revert commit 1307bbd, which uses the s_umount semaphore to provide
exclusion between xfs_sync_worker and unmount, in favor of shutting down
the sync worker before freeing the log in xfs_log_unmount.  This is a
cleaner way of resolving the race between xfs_sync_worker and unmount
than using s_umount.

Signed-off-by: Ben Myers <bpm@sgi.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
12 years agoxfs: Fix overallocation in xfs_buf_allocate_memory()
Jan Kara [Tue, 5 Jun 2012 22:32:26 +0000 (00:32 +0200)]
xfs: Fix overallocation in xfs_buf_allocate_memory()

Commit de1cbee which removed b_file_offset in favor of b_bn introduced a bug
causing xfs_buf_allocate_memory() to overestimate the number of necessary
pages. The problem is that xfs_buf_alloc() sets b_bn to -1 and thus effectively
every buffer is straddling a page boundary which causes
xfs_buf_allocate_memory() to allocate two pages and use vmalloc() for access
which is unnecessary.

Dave says xfs_buf_alloc() doesn't need to set b_bn to -1 anymore since the
buffer is inserted into the cache only after being fully initialized now.
So just make xfs_buf_alloc() fill in proper block number from the beginning.

CC: David Chinner <dchinner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
12 years agoxfs: fix allocbt cursor leak in xfs_alloc_ag_vextent_near
Dave Chinner [Tue, 12 Jun 2012 04:20:26 +0000 (14:20 +1000)]
xfs: fix allocbt cursor leak in xfs_alloc_ag_vextent_near

When we fail to find an matching extent near the requested extent
specification during a left-right distance search in
xfs_alloc_ag_vextent_near, we fail to free the original cursor that
we used to look up the XFS_BTNUM_CNT tree and hence leak it.

Reported-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
12 years agoxfs: check for stale inode before acquiring iflock on push
Brian Foster [Mon, 11 Jun 2012 14:39:43 +0000 (10:39 -0400)]
xfs: check for stale inode before acquiring iflock on push

An inode in the AIL can be flush locked and marked stale if
a cluster free transaction occurs at the right time. The
inode item is then marked as flushing, which causes xfsaild
to spin and leaves the filesystem stalled. This is
reproduced by running xfstests 273 in a loop for an
extended period of time.

Check for stale inodes before the flush lock. This marks
the inode as pinned, leads to a log flush and allows the
filesystem to proceed.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
12 years agooprofile: perf: use NR_CPUS instead or nr_cpumask_bits for static array
Will Deacon [Fri, 8 Jun 2012 15:16:04 +0000 (16:16 +0100)]
oprofile: perf: use NR_CPUS instead or nr_cpumask_bits for static array

The OProfile perf backend uses a static array to keep track of the
perf events on the system. When compiling with CONFIG_CPUMASK_OFFSTACK=y
&& SMP, nr_cpumask_bits is not a compile-time constant and the build
will fail with:

oprofile_perf.c:28: error: variably modified 'perf_events' at file scope

This patch uses NR_CPUs instead of nr_cpumask_bits for the array
initialisation. If this causes space problems in the future, we can
always move to dynamic allocation for the events array.

Cc: Matt Fleming <matt@console-pimps.org>
Reported-by: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org> # v2.6.37+
Signed-off-by: Robert Richter <robert.richter@amd.com>
12 years agoBtrfs: delay iput with async extents
Josef Bacik [Fri, 15 Jun 2012 18:19:48 +0000 (12:19 -0600)]
Btrfs: delay iput with async extents

There is some concern that these iput()'s could be the final iputs and could
induce lockups on people waiting on writeback.  This would happen in the
rare case that we don't create ordered extents because of an error, but it
is theoretically possible and we already have a mechanism to deal with this
so just make them delayed iputs to negate any worry.

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
12 years agoBtrfs: add a missing spin_lock
Josef Bacik [Mon, 18 Jun 2012 13:23:18 +0000 (07:23 -0600)]
Btrfs: add a missing spin_lock

When fixing up the locking in the delayed ref destruction work I accidently
broke the locking myself ;(.  Add back a spin_lock that should be there and
we are now all set.  Thanks,
Btrfs: add a missing spin_lock

When fixing up the locking in the delayed ref destruction work I accidently
broke the locking myself ;(.  Add back a spin_lock that should be there and
we are now all set.  Thanks,

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
12 years agoBtrfs: don't assume to be on the correct extent in add_all_parents
Alexander Block [Tue, 19 Jun 2012 13:42:26 +0000 (07:42 -0600)]
Btrfs: don't assume to be on the correct extent in add_all_parents

add_all_parents did assume that path is already at a correct extent data
item, which may not be true in case of data extents that were partly
rewritten and splitted.

We need to check if we're on a matching extent for every item and only
for the ones after the first. The loop is changed to do this now.

This patch also fixes a bug introduced with commit 3b127fd8 "Btrfs:
remove obsolete btrfs_next_leaf call from __resolve_indirect_ref".
The removal of next_leaf did sometimes result in slot==nritems when
the above described case happens, and thus resulting in invalid values
(e.g. wanted_obejctid) in add_all_parents (leading to missed backrefs
or even crashes).

Signed-off-by: Alexander Block <ablock84@googlemail.com>
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
12 years agoBtrfs: introduce btrfs_next_old_item
Alexander Block [Tue, 19 Jun 2012 13:42:25 +0000 (07:42 -0600)]
Btrfs: introduce btrfs_next_old_item

We introduce btrfs_next_old_item that uses btrfs_next_old_leaf instead
of btrfs_next_leaf.

btrfs_next_item is also changed to simply call btrfs_next_old_item with
time_seq being 0.

Signed-off-by: Alexander Block <ablock84@googlemail.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
12 years agoMerge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Thu, 21 Jun 2012 05:12:52 +0000 (22:12 -0700)]
Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma

Pull slave-dmaengine fixes from Vinod Koul:
 "A few fixes in pl330 and imx-sdma drivers."

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  DMA: PL330: Fix racy mutex unlock
  DMA: PL330: Add missing static storage class specifier
  dma: imx-sdma: buf_tail should be initialize in prepare function
  dmaengine: pl330: dont complete descriptor for cyclic dma

12 years agoMerge branch 'for-3.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Thu, 21 Jun 2012 05:11:04 +0000 (22:11 -0700)]
Merge branch 'for-3.5-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull two cgroup fixes from Tejun Heo:
 "This containes two patches fixing a refcnt race bug during css_put().
  Decrementing and checking the value weren't atomic and two tasks could
  think that they both pushed the counter to zero."

* 'for-3.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroups: Account for CSS_DEACT_BIAS in __css_put
  cgroup: make sure that decisions in __css_put are atomic

12 years agomm, mempolicy: fix mbind() to do synchronous migration
David Rientjes [Thu, 21 Jun 2012 01:00:12 +0000 (18:00 -0700)]
mm, mempolicy: fix mbind() to do synchronous migration

If the range passed to mbind() is not allocated on nodes set in the
nodemask, it migrates the pages to respect the constraint.

The final formal of migrate_pages() is a mode of type enum migrate_mode,
not a boolean.  do_mbind() is currently passing "true" which is the
equivalent of MIGRATE_SYNC_LIGHT.  This should instead be MIGRATE_SYNC
for synchronous page migration.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomedia: pms.c needs linux/slab.h
Randy Dunlap [Thu, 21 Jun 2012 01:30:30 +0000 (18:30 -0700)]
media: pms.c needs linux/slab.h

drivers/media/video/pms.c uses kzalloc() and kfree() so it should
include <linux/slab.h> to fix build errors and a warning.

  drivers/media/video/pms.c:1047:2: error: implicit declaration of function 'kzalloc'
  drivers/media/video/pms.c:1047:6: warning: assignment makes pointer from integer without a cast
  drivers/media/video/pms.c:1116:2: error: implicit declaration of function 'kfree'

Found in mmotm but applies to mainline.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge tag 'staging-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Wed, 20 Jun 2012 22:15:03 +0000 (15:15 -0700)]
Merge tag 'staging-3.5-rc4' of git://git./linux/kernel/git/gregkh/staging

Pull staging tree fixes from Greg Kroah-Hartman:
 "Here are a number of small fixes for the drivers/staging tree, as well
  as iio and pstore drivers (which came from the staging tree in the
  3.5-rc1 merge).  All of these are tiny, but resolve issues that people
  have been reporting.

  There's also a documentation update to reflect what the iio drivers
  really are doing, which is good to get straightened out.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'staging-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: r8712u: Add new USB IDs
  staging: gdm72xx: Release netlink socket properly
  iio: drop wrong reference from Kconfig
  pstore/inode: Make pstore_fill_super() static
  pstore/ram: Should zap persistent zone on unlink
  pstore/ram_core: Factor persistent_ram_zap() out of post_init()
  pstore/ram_core: Do not reset restored zone's position and size
  pstore/ram: Should update old dmesg buffer before reading
  staging:iio:ad7298: Fix linker error due to missing IIO kfifo buffer
  Revert "staging: usbip: bugfix for stack corruption on 64-bit architectures"
  staging: usbip: bugfix for stack corruption on 64-bit architectures
  staging/comedi: fix build for USB not enabled
  staging: omapdrm: fix crash when freeing bad fb
  staging:iio:ad7606: Re-add missing scale attribute
  iio: Fix potential use after free
  staging:iio: remove num_interrupt_lines from documentation
  iio: documentation: Add out_altvoltage and friends

12 years agoMerge tag 'driver-core-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 20 Jun 2012 22:14:28 +0000 (15:14 -0700)]
Merge tag 'driver-core-3.5-rc4' of git://git./linux/kernel/git/gregkh/driver-core

Pull driver core and printk fixes from Greg Kroah-Hartman:
 "Here are some fixes for 3.5-rc4 that resolve the kmsg problems that
  people have reported showing up after the printk and kmsg changes went
  into 3.5-rc1.  There are also a smattering of other tiny fixes for the
  extcon and hyper-v drivers that people have reported.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'driver-core-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  extcon: max8997: Add missing kfree for info->edev in max8997_muic_remove()
  extcon: Set platform drvdata in gpio_extcon_probe() and fix irq leak
  extcon: Fix wrong index in max8997_extcon_cable[]
  kmsg - kmsg_dump() fix CONFIG_PRINTK=n compilation
  printk: return -EINVAL if the message len is bigger than the buf size
  printk: use mutex lock to stop syslog_seq from going wild
  kmsg - kmsg_dump() use iterator to receive log buffer content
  vme: change maintainer e-mail address
  Extcon: Don't try to create duplicate link names
  driver core: fixup reversed deferred probe order
  printk: Fix alignment of buf causing crash on ARM EABI
  Tools: hv: verify origin of netlink connector message

12 years agoMerge tag 'char-misc-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Wed, 20 Jun 2012 22:13:56 +0000 (15:13 -0700)]
Merge tag 'char-misc-3.5-rc4' of git://git./linux/kernel/git/gregkh/char-misc

Pull misc tree updates from Greg Kroah-Hartman:
 "Here are some drivers/misc bugfixes (really just drivers/misc/mei/
  fixes) for a few problems that have been reported.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'char-misc-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  misc: mei: set WDIOF_ALARMONLY on mei watchdog
  misc: mei: Disable MSI when IRQ registration fails
  misc: mei: fix stalled read
  misc: mei: unregister misc device in pci_remove function
  misc: mei: set IRQF_ONESHOT for msi request_threaded_irq

12 years agoMerge tag 'tty-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Wed, 20 Jun 2012 22:13:13 +0000 (15:13 -0700)]
Merge tag 'tty-3.5-rc4' of git://git./linux/kernel/git/gregkh/tty

Pull serial driver fixes from Greg Kroah-Hartman:
 "Here are 3 patches resolving a boot regression (the mop500 fix), a
  build warning fix, and a kernel-doc fix.  All tiny, but should go into
  the final 3.5 release.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'tty-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial/amba-pl011: move custom pin control to driver
  serial: fix serial_txx9.c build warning/typo
  serial: fix kernel-doc warnings in 8250.c

12 years agoMerge branch 'akpm' (Andrew's patch-bomb)
Linus Torvalds [Wed, 20 Jun 2012 21:41:57 +0000 (14:41 -0700)]
Merge branch 'akpm' (Andrew's patch-bomb)

* emailed from Andrew Morton <akpm@linux-foundation.org>: (21 patches)
  mm/memblock: fix overlapping allocation when doubling reserved array
  c/r: prctl: Move PR_GET_TID_ADDRESS to a proper place
  pidns: find_new_reaper() can no longer switch to init_pid_ns.child_reaper
  pidns: guarantee that the pidns init will be the last pidns process reaped
  fault-inject: avoid call to random32() if fault injection is disabled
  Viresh has moved
  get_maintainer: Fix --help warning
  mm/memory.c: fix kernel-doc warnings
  mm: fix kernel-doc warnings
  mm: correctly synchronize rss-counters at exit/exec
  mm, thp: print useful information when mmap_sem is unlocked in zap_pmd_range
  h8300: use the declarations provided by <asm/sections.h>
  h8300: fix use of extinct _sbss and _ebss
  xtensa: use the declarations provided by <asm/sections.h>
  xtensa: use "test -e" instead of bashism "test -a"
  xtensa: replace xtensa-specific _f{data,text} by _s{data,text}
  memcg: fix use_hierarchy css_is_ancestor oops regression
  mm, oom: fix and cleanup oom score calculations
  nilfs2: ensure proper cache clearing for gc-inodes
  thp: avoid atomic64_read in pmd_read_atomic for 32bit PAE
  ...

12 years agomm/memblock: fix overlapping allocation when doubling reserved array
Greg Pearson [Wed, 20 Jun 2012 19:53:05 +0000 (12:53 -0700)]
mm/memblock: fix overlapping allocation when doubling reserved array

__alloc_memory_core_early() asks memblock for a range of memory then try
to reserve it.  If the reserved region array lacks space for the new
range, memblock_double_array() is called to allocate more space for the
array.  If memblock is used to allocate memory for the new array it can
end up using a range that overlaps with the range originally allocated in
__alloc_memory_core_early(), leading to possible data corruption.

With this patch memblock_double_array() now calls memblock_find_in_range()
with a narrowed candidate range (in cases where the reserved.regions array
is being doubled) so any memory allocated will not overlap with the
original range that was being reserved.  The range is narrowed by passing
in the starting address and size of the previously allocated range.  Then
the range above the ending address is searched and if a candidate is not
found, the range below the starting address is searched.

Signed-off-by: Greg Pearson <greg.pearson@hp.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoc/r: prctl: Move PR_GET_TID_ADDRESS to a proper place
Cyrill Gorcunov [Wed, 20 Jun 2012 19:53:04 +0000 (12:53 -0700)]
c/r: prctl: Move PR_GET_TID_ADDRESS to a proper place

During merging of PR_GET_TID_ADDRESS patch the code has been misplaced (it
happened to appear under PR_MCE_KILL) in result noone can use this option.

Fix it by moving code snippet to a proper place.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agopidns: find_new_reaper() can no longer switch to init_pid_ns.child_reaper
Oleg Nesterov [Wed, 20 Jun 2012 19:53:04 +0000 (12:53 -0700)]
pidns: find_new_reaper() can no longer switch to init_pid_ns.child_reaper

find_new_reaper() changes pid_ns->child_reaper, see add0d4df ("pid_ns:
zap_pid_ns_processes: fix the ->child_reaper changing").

The original reason has gone away after the previous patch, ->children
list must be empty after zap_pid_ns_processes().

However now we can not switch to init_pid_ns.child_reaper.
__unhash_process() relies on the "->child_reaper == parent" check, but
this check does not work if the last exiting task is also the child
reaper.

As Eric sugested, we can change __unhash_process() to use the parent's
pid_ns and remove this code.

Also, with this change we can move detach_pid(PIDTYPE_PID) back, where it
was before the previous fix.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Louis Rilling <louis.rilling@kerlabs.com>
Cc: Mike Galbraith <efault@gmx.de>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Tested-by: Andrew Wagin <avagin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agopidns: guarantee that the pidns init will be the last pidns process reaped
Eric W. Biederman [Wed, 20 Jun 2012 19:53:03 +0000 (12:53 -0700)]
pidns: guarantee that the pidns init will be the last pidns process reaped

Today we have a twofold bug.  Sometimes release_task on pid == 1 in a pid
namespace can run before other processes in a pid namespace have had
release task called.  With the result that pid_ns_release_proc can be
called before the last proc_flus_task() is done using upid->ns->proc_mnt,
resulting in the use of a stale pointer.  This same set of circumstances
can lead to waitpid(...) returning for a processes started with
clone(CLONE_NEWPID) before the every process in the pid namespace has
actually exited.

To fix this modify zap_pid_ns_processess wait until all other processes in
the pid namespace have exited, even EXIT_DEAD zombies.

The delay_group_leader and related tests ensure that the thread gruop
leader will be the last thread of a process group to be reaped, or to
become EXIT_DEAD and self reap.  With the change to zap_pid_ns_processes
we get the guarantee that pid == 1 in a pid namespace will be the last
task that release_task is called on.

With pid == 1 being the last task to pass through release_task
pid_ns_release_proc can no longer be called too early nor can wait return
before all of the EXIT_DEAD tasks in a pid namespace have exited.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Louis Rilling <louis.rilling@kerlabs.com>
Cc: Mike Galbraith <efault@gmx.de>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Tested-by: Andrew Wagin <avagin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agofault-inject: avoid call to random32() if fault injection is disabled
Anton Blanchard [Wed, 20 Jun 2012 19:53:03 +0000 (12:53 -0700)]
fault-inject: avoid call to random32() if fault injection is disabled

After enabling CONFIG_FAILSLAB I noticed random32 in profiles even if slub
fault injection wasn't enabled at runtime.

should_fail forces a comparison against random32() even if probability is
0:

        if (attr->probability <= random32() % 100)
                return false;

Add a check up front for probability == 0 and avoid all of the more
complicated checks.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoViresh has moved
Viresh Kumar [Wed, 20 Jun 2012 19:53:02 +0000 (12:53 -0700)]
Viresh has moved

viresh.kumar@st.com email-id doesn't exist anymore as I have left the
company.  Replace ST's id with viresh.linux@gmail.com.

It also updates .mailmap file to fix address for 'git shortlog'

Signed-off-by: Viresh Kumar <viresh.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoget_maintainer: Fix --help warning
Joe Perches [Wed, 20 Jun 2012 19:53:02 +0000 (12:53 -0700)]
get_maintainer: Fix --help warning

Using --help emits a concatenation error.  Fix it.

Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Paul Bolle <pebolle@tiscali.nl>
Tested-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm/memory.c: fix kernel-doc warnings
Randy Dunlap [Wed, 20 Jun 2012 19:53:02 +0000 (12:53 -0700)]
mm/memory.c: fix kernel-doc warnings

Fix kernel-doc warnings in mm/memory.c:

  Warning(mm/memory.c:1377): No description found for parameter 'start'
  Warning(mm/memory.c:1377): Excess function parameter 'address' description in 'zap_page_range'

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm: fix kernel-doc warnings
Wanpeng Li [Wed, 20 Jun 2012 19:53:01 +0000 (12:53 -0700)]
mm: fix kernel-doc warnings

Fix kernel-doc warnings such as

  Warning(../mm/page_cgroup.c:432): No description found for parameter 'id'
  Warning(../mm/page_cgroup.c:432): Excess function parameter 'mem' description in 'swap_cgroup_record'

Signed-off-by: Wanpeng Li <liwp@linux.vnet.ibm.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm: correctly synchronize rss-counters at exit/exec
Konstantin Khlebnikov [Wed, 20 Jun 2012 19:53:01 +0000 (12:53 -0700)]
mm: correctly synchronize rss-counters at exit/exec

do_exit() and exec_mmap() call sync_mm_rss() before mm_release() does
put_user(clear_child_tid) which can update task->rss_stat and thus make
mm->rss_stat inconsistent.  This triggers the "BUG:" printk in check_mm().

Let's fix this bug in the safest way, and optimize/cleanup this later.

Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm, thp: print useful information when mmap_sem is unlocked in zap_pmd_range
David Rientjes [Wed, 20 Jun 2012 19:53:00 +0000 (12:53 -0700)]
mm, thp: print useful information when mmap_sem is unlocked in zap_pmd_range

Andrea asked for addr, end, vma->vm_start, and vma->vm_end to be emitted
when !rwsem_is_locked(&tlb->mm->mmap_sem).  Otherwise, debugging the
underlying issue is more difficult.

Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoh8300: use the declarations provided by <asm/sections.h>
Geert Uytterhoeven [Wed, 20 Jun 2012 19:53:00 +0000 (12:53 -0700)]
h8300: use the declarations provided by <asm/sections.h>

Cleanups:
  - Include <asm/sections.h>,
  - Remove the (different) extern declarations,
  - Remove the no longer needed address-of ('&') operators,
  - Remove the superfluous casts, use proper printk formatting instead.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoh8300: fix use of extinct _sbss and _ebss
Geert Uytterhoeven [Wed, 20 Jun 2012 19:53:00 +0000 (12:53 -0700)]
h8300: fix use of extinct _sbss and _ebss

Nowadays it should use __bss_start and __bss_stop

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoxtensa: use the declarations provided by <asm/sections.h>
Geert Uytterhoeven [Wed, 20 Jun 2012 19:52:59 +0000 (12:52 -0700)]
xtensa: use the declarations provided by <asm/sections.h>

Cleanups:
  - Include <asm/sections.h>,
  - Remove the (different) extern declarations,
  - Remove the no longer needed address-of ('&') operators,
  - Use %p to format pointer differences.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoxtensa: use "test -e" instead of bashism "test -a"
Geert Uytterhoeven [Wed, 20 Jun 2012 19:52:59 +0000 (12:52 -0700)]
xtensa: use "test -e" instead of bashism "test -a"

On Ubuntu, /bin/sh is a symlink to dash, which does not support "test -a".
This causes messages like

    test: 1: -a: unexpected operator
    test: 1: -a: unexpected operator

and link failures like

    (.init.text+0x132): undefined reference to `platform_init'

due to the appropriate platform code not being compiled.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoxtensa: replace xtensa-specific _f{data,text} by _s{data,text}
Geert Uytterhoeven [Wed, 20 Jun 2012 19:52:58 +0000 (12:52 -0700)]
xtensa: replace xtensa-specific _f{data,text} by _s{data,text}

commit a2d063ac216c161 ("extable, core_kernel_data(): Make sure all archs
define _sdata") missed xtensa.  Xtensa does have a start of data marker,
but calls it _fdata, causing

    kernel/built-in.o:(.text+0x964): undefined reference to `_sdata'

_stext was already defined, but it was duplicated by _fdata.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: fix use_hierarchy css_is_ancestor oops regression
Hugh Dickins [Wed, 20 Jun 2012 19:52:58 +0000 (12:52 -0700)]
memcg: fix use_hierarchy css_is_ancestor oops regression

If use_hierarchy is set, reclaim testing soon oopses in css_is_ancestor()
called from __mem_cgroup_same_or_subtree() called from page_referenced():
when processes are exiting, it's easy for mm_match_cgroup() to pass along
a NULL memcg coming from a NULL mm->owner.

Check for that in __mem_cgroup_same_or_subtree().  Return true or false?
False because we cannot know if it was in the hierarchy, but also false
because it's better not to count a reference from an exiting process.

Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm, oom: fix and cleanup oom score calculations
David Rientjes [Wed, 20 Jun 2012 19:52:58 +0000 (12:52 -0700)]
mm, oom: fix and cleanup oom score calculations

The divide in p->signal->oom_score_adj * totalpages / 1000 within
oom_badness() was causing an overflow of the signed long data type.

This adds both the root bias and p->signal->oom_score_adj before doing the
normalization which fixes the issue and also cleans up the calculation.

Tested-by: Dave Jones <davej@redhat.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agonilfs2: ensure proper cache clearing for gc-inodes
Ryusuke Konishi [Wed, 20 Jun 2012 19:52:57 +0000 (12:52 -0700)]
nilfs2: ensure proper cache clearing for gc-inodes

A gc-inode is a pseudo inode used to buffer the blocks to be moved by
garbage collection.

Block caches of gc-inodes must be cleared every time a garbage collection
function (nilfs_clean_segments) completes.  Otherwise, stale blocks
buffered in the caches may be wrongly reused in successive calls of the GC
function.

For user files, this is not a problem because their gc-inodes are
distinguished by a checkpoint number as well as an inode number.  They
never buffer different blocks if either an inode number, a checkpoint
number, or a block offset differs.

However, gc-inodes of sufile, cpfile and DAT file can store different data
for the same block offset.  Thus, the nilfs_clean_segments function can
move incorrect block for these meta-data files if an old block is cached.
I found this is really causing meta-data corruption in nilfs.

This fixes the issue by ensuring cache clear of gc-inodes and resolves
reported GC problems including checkpoint file corruption, b-tree
corruption, and the following warning during GC.

  nilfs_palloc_freev: entry number 307234 already freed.
  ...

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Tested-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: <stable@vger.kernel.org> [2.6.37+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agothp: avoid atomic64_read in pmd_read_atomic for 32bit PAE
Andrea Arcangeli [Wed, 20 Jun 2012 19:52:57 +0000 (12:52 -0700)]
thp: avoid atomic64_read in pmd_read_atomic for 32bit PAE

In the x86 32bit PAE CONFIG_TRANSPARENT_HUGEPAGE=y case while holding the
mmap_sem for reading, cmpxchg8b cannot be used to read pmd contents under
Xen.

So instead of dealing only with "consistent" pmdvals in
pmd_none_or_trans_huge_or_clear_bad() (which would be conceptually
simpler) we let pmd_none_or_trans_huge_or_clear_bad() deal with pmdvals
where the low 32bit and high 32bit could be inconsistent (to avoid having
to use cmpxchg8b).

The only guarantee we get from pmd_read_atomic is that if the low part of
the pmd was found null, the high part will be null too (so the pmd will be
considered unstable).  And if the low part of the pmd is found "stable"
later, then it means the whole pmd was read atomically (because after a
pmd is stable, neither MADV_DONTNEED nor page faults can alter it anymore,
and we read the high part after the low part).

In the 32bit PAE x86 case, it is enough to read the low part of the pmdval
atomically to declare the pmd as "stable" and that's true for THP and no
THP, furthermore in the THP case we also have a barrier() that will
prevent any inconsistent pmdvals to be cached by a later re-read of the
*pmd.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Jonathan Nieder <jrnieder@gmail.com>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Petr Matousek <pmatouse@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm: fix slab->page _count corruption when using slub
Pravin B Shelar [Wed, 20 Jun 2012 19:52:56 +0000 (12:52 -0700)]
mm: fix slab->page _count corruption when using slub

On arches that do not support this_cpu_cmpxchg_double() slab_lock is used
to do atomic cmpxchg() on double word which contains page->_count.  The
page count can be changed from get_page() or put_page() without taking
slab_lock.  That corrupts page counter.

Fix it by moving page->_count out of cmpxchg_double data.  So that slub
does no change it while updating slub meta-data in struct page.

[akpm@linux-foundation.org: use standard comment layout, tweak comment text]
Reported-by: Amey Bhide <abhide@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoxfs: fix debug_object WARN at xfs_alloc_vextent()
Jeff Liu [Thu, 7 Jun 2012 07:44:32 +0000 (15:44 +0800)]
xfs: fix debug_object WARN at xfs_alloc_vextent()

Fengguang reports:

[  780.529603] XFS (vdd): Ending clean mount
[  781.454590] ODEBUG: object is on stack, but not annotated
[  781.455433] ------------[ cut here ]------------
[  781.455433] WARNING: at /c/kernel-tests/sound/lib/debugobjects.c:301 __debug_object_init+0x173/0x1f1()
[  781.455433] Hardware name: Bochs
[  781.455433] Modules linked in:
[  781.455433] Pid: 26910, comm: kworker/0:2 Not tainted 3.4.0+ #51
[  781.455433] Call Trace:
[  781.455433]  [<ffffffff8106bc84>] warn_slowpath_common+0x83/0x9b
[  781.455433]  [<ffffffff8106bcb6>] warn_slowpath_null+0x1a/0x1c
[  781.455433]  [<ffffffff814919a5>] __debug_object_init+0x173/0x1f1
[  781.455433]  [<ffffffff81491c65>] debug_object_init+0x14/0x16
[  781.455433]  [<ffffffff8108842a>] __init_work+0x20/0x22
[  781.455433]  [<ffffffff8134ea56>] xfs_alloc_vextent+0x6c/0xd5

Use INIT_WORK_ONSTACK in xfs_alloc_vextent instead of INIT_WORK.

Reported-by: Wu Fengguang <wfg@linux.intel.com>
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
12 years agoxfs: xfs_vm_writepage clear iomap_valid when !buffer_uptodate (REV2)
Alain Renaud [Fri, 8 Jun 2012 19:34:46 +0000 (15:34 -0400)]
xfs: xfs_vm_writepage clear iomap_valid when !buffer_uptodate (REV2)

On filesytems with a block size smaller than PAGE_SIZE we currently have
a problem with unwritten extents.  If a we have multi-block page for
which an unwritten extent has been allocated, and only some of the
buffers have been written to, and they are not contiguous, we can expose
stale data from disk in the blocks between the writes after extent
conversion.

Example of a page with unwritten and real data.
buffer  content
0       empty  b_state = 0
1       DATA   b_state = 0x1023 Uptodate,Dirty,Mapped,Unwritten
2       DATA   b_state = 0x1023 Uptodate,Dirty,Mapped,Unwritten
3       empty  b_state = 0
4       empty  b_state = 0
5       DATA   b_state = 0x1023 Uptodate,Dirty,Mapped,Unwritten
6       DATA   b_state = 0x1023 Uptodate,Dirty,Mapped,Unwritten
7       empty  b_state = 0

Buffers 1, 2, 5, and 6 have been written to, leaving 0, 3, 4, and 7
empty.  Currently buffers 1, 2, 5, and 6 are added to a single ioend,
and when IO has completed, extent conversion creates a real extent from
block 1 through block 6, leaving 0 and 7 unwritten.  However buffers 3
and 4 were not written to disk, so stale data is exposed from those
blocks on a subsequent read.

Fix this by setting iomap_valid = 0 when we find a buffer that is not
Uptodate.  This ensures that buffers 5 and 6 are not added to the same
ioend as buffers 1 and 2.  Later these blocks will be converted into two
separate real extents, leaving the blocks in between unwritten.

Signed-off-by: Alain Renaud <arenaud@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
12 years agoNFS: Force the legacy idmapper to be single threaded
Bryan Schumaker [Wed, 20 Jun 2012 18:35:28 +0000 (14:35 -0400)]
NFS: Force the legacy idmapper to be single threaded

It was initially coded under the assumption that there would only be one
request at a time, so use a lock to enforce this requirement..

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
CC: stable@vger.kernel.org [3.4+]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoMerge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Linus Torvalds [Wed, 20 Jun 2012 16:42:09 +0000 (09:42 -0700)]
Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM fixes from Russell King:
 "This includes three MMCI changes - one to fix up the wrong version of
  the DT support patch which was merged, and two to make deferred
  probing work.  It also includes a fix to the OMAP SPI driver which is
  causing a boot time warning.

  The remainder are very minor ARM fixes."

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  SPI: fix over-eager devm_xxx() conversion
  ARM: 7427/1: mmc: mmci: Defer probe() in case of yet uninitialized GPIOs
  ARM: 7426/1: mmc: mmci: Remove wrong error handling of gpio 0
  ARM: 7425/1: extable: ensure fixup entries are 4-byte aligned
  ARM: 7421/1: bpf_jit: BPF_S_ANC_ALU_XOR_X support
  ARM: 7423/1: kprobes: run t32_simulate_ldr_literal() without insn slot
  ARM: 7422/1: mmc: mmci: Allocate platform memory during Device Tree boot

12 years agoMerge tag 'pinctrl-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Wed, 20 Jun 2012 16:41:21 +0000 (09:41 -0700)]
Merge tag 'pinctrl-fixes' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull two pinctrl fixes from Linus Walleij:
 - Fixed a 2-line compile error for MXS
 - A pure documentation fix for Nomadik

* tag 'pinctrl-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl/nomadik: document Alt-C glitch
  pinctrl: mxs: Use kfree to fix build error

12 years agolibceph: flush msgr queue during mon_client shutdown
Sage Weil [Mon, 11 Jun 2012 03:43:56 +0000 (20:43 -0700)]
libceph: flush msgr queue during mon_client shutdown

We need to flush the msgr workqueue during mon_client shutdown to
ensure that any work affecting our embedded ceph_connection is
finished so that we can be safely destroyed.

Previously, we were flushing the work queue after osd_client
shutdown and before mon_client shutdown to ensure that any osd
connection refs to authorizers are flushed.  Remove the redundant
flush, and document in the comment that the mon_client flush is
needed to cover that case as well.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
(cherry picked from commit f3dea7edd3d449fe7a6d402c1ce56a294b985261)

12 years agorbd: Clear ceph_msg->bio_iter for retransmitted message
Yan, Zheng [Thu, 7 Jun 2012 00:35:55 +0000 (19:35 -0500)]
rbd: Clear ceph_msg->bio_iter for retransmitted message

The bug can cause NULL pointer dereference in write_partial_msg_pages

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Reviewed-by: Alex Elder <elder@inktank.com>
(cherry picked from commit 43643528cce60ca184fe8197efa8e8da7c89a037)

12 years agolibceph: use con get/put ops from osd_client
Sage Weil [Fri, 1 Jun 2012 03:22:18 +0000 (20:22 -0700)]
libceph: use con get/put ops from osd_client

There were a few direct calls to ceph_con_{get,put}() instead of the con
ops from osd_client.c.  This is a bug since those ops aren't defined to
be ceph_con_get/put.

This breaks refcounting on the ceph_osd structs that contain the
ceph_connections, and could lead to all manner of strangeness.

The purpose of the ->get and ->put methods in a ceph connection are
to allow the connection to indicate it has a reference to something
external to the messaging system, *not* to indicate something
external has a reference to the connection.

[elder@inktank.com: added that last sentence]

Signed-off-by: Sage Weil <sage@newdream.net>
Reviewed-by: Alex Elder <elder@inktank.com>
(cherry picked from commit 0d47766f14211a73eaf54cab234db134ece79f49)

12 years agolibceph: osd_client: don't drop reply reference too early
Alex Elder [Mon, 4 Jun 2012 19:43:32 +0000 (14:43 -0500)]
libceph: osd_client: don't drop reply reference too early

In ceph_osdc_release_request(), a reference to the r_reply message
is dropped.  But just after that, that same message is revoked if it
was in use to receive an incoming reply.  Reorder these so we are
sure we hold a reference until we're actually done with the message.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
(cherry picked from commit ab8cb34a4b2f60281a4b18b1f1ad23bc2313d91b)

12 years agoceph: check PG_Private flag before accessing page->private
Yan, Zheng [Mon, 28 May 2012 06:44:30 +0000 (14:44 +0800)]
ceph: check PG_Private flag before accessing page->private

I got lots of NULL pointer dereference Oops when compiling kernel on ceph.
The bug is because the kernel page migration routine replaces some pages
in the page cache with new pages, these new pages' private can be non-zero.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
(cherry picked from commit 28c0254ede13ab575d2df5c6585ed3d4817c3e6b)

12 years agoMerge branch 'tip/perf/urgent-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Wed, 20 Jun 2012 12:26:58 +0000 (14:26 +0200)]
Merge branch 'tip/perf/urgent-2' of git://git./linux/kernel/git/rostedt/linux-trace into perf/urgent

12 years agoMerge tag 'sound-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Wed, 20 Jun 2012 06:37:19 +0000 (23:37 -0700)]
Merge tag 'sound-3.5' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Most of changes are fairly small and driver-specific.

  A remaining regression fix for USB-audio sync pipe check, a fix for
  HD-audio power-up sequence, fixes for ASoC pxa-ssp compile issues, and
  bunch of ASoC codec and trivial fix patches."

* tag 'sound-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: 6fire: use NULL instead of 0 for pointer assignment
  ALSA: hda - Handle open while transitioning to D3.
  ALSA: snd-usb: make snd_usb_substream_capture_trigger static
  ALSA: snd-usb: fix sync pipe check
  ASoC: tegra+wm8903: turn of mic detect when card is removed
  ASoC: wm8996: Mark the CODEC as cache only when powering off on boot
  ASoC: wm8996: Move reset before the initial regulator disable
  ASoC: wm8996: Remove spurious regulator_bulk_free()
  ASoC: wm8904: Fix cache only management
  ASoC: wm8904: Fix GPIO and MICBIAS initialisation for regmap conversion
  ASoC: fix pxa-ssp compiling issue under mach-mmp
  ARM: MMP: add pxa910-ssp into ssp_id_table

12 years agoNFS: Initialise commit_info.rpc_out when !defined(CONFIG_NFS_V4)
Trond Myklebust [Tue, 19 Jun 2012 22:38:56 +0000 (18:38 -0400)]
NFS: Initialise commit_info.rpc_out when !defined(CONFIG_NFS_V4)

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Fix a refcounting issue in O_DIRECT
Trond Myklebust [Tue, 19 Jun 2012 17:39:14 +0000 (13:39 -0400)]
NFS: Fix a refcounting issue in O_DIRECT

In nfs_direct_write_reschedule(), the requests from nfs_scan_commit_list
have a refcount of 2, whereas the operations in
nfs_direct_write_completion_ops expect them to have a refcount of 1.

This patch adds a call to release the extra references.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoMerge tag 'regulator-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
Linus Torvalds [Tue, 19 Jun 2012 19:35:44 +0000 (12:35 -0700)]
Merge tag 'regulator-3.5' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "One small bug fix, plus a rename of all the ST Ericsson regulators in
  the device tree since all the device trees had been written with
  different names and some infelicities in the test proceedures meant
  that the device tree code had apparently never actually been run
  against the upstream device tree."

* tag 'regulator-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: Change db8500-prcmu match names to reflect Device Tree
  regulator: Change ab8500 match names to reflect Device Tree
  regulator: Fix the s5m8767a problem of the division by null

12 years agoNFSv4.1: Fix a race in set_pnfs_layoutdriver
Trond Myklebust [Fri, 15 Jun 2012 17:02:58 +0000 (13:02 -0400)]
NFSv4.1: Fix a race in set_pnfs_layoutdriver

The call to try_module_get() dereferences ld_type outside the
spin locks, which means that it may be pointing to garbage if
a module unload was in progress.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoextcon: max8997: Add missing kfree for info->edev in max8997_muic_remove()
Axel Lin [Sat, 16 Jun 2012 13:25:11 +0000 (21:25 +0800)]
extcon: max8997: Add missing kfree for info->edev in max8997_muic_remove()

extcon_dev_unregister(info->edev) doest not free info->edev, we need to call
kfree(info->edev) here.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
12 years agoextcon: Set platform drvdata in gpio_extcon_probe() and fix irq leak
Axel Lin [Sat, 16 Jun 2012 03:55:18 +0000 (11:55 +0800)]
extcon: Set platform drvdata in gpio_extcon_probe() and fix irq leak

Add missing platform_set_drvdata() in gpio_extcon_probe(), otherwise calling
platform_get_drvdata in gpio_extcon_remove() returns NULL.

Also add missing free_irq call in gpio_extcon_remove().

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
12 years agoextcon: Fix wrong index in max8997_extcon_cable[]
Axel Lin [Sat, 16 Jun 2012 03:36:08 +0000 (11:36 +0800)]
extcon: Fix wrong index in max8997_extcon_cable[]

Currently, the index of "Dock-desk" and "Dock-card" are the same.
Thus the latter one overrides the first one.
Then we have problem when calling extcon_find_cable_index() because
edev->supported_cable[7] only matches "Dock-card".

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
12 years agokmsg - kmsg_dump() fix CONFIG_PRINTK=n compilation
Kay Sievers [Mon, 18 Jun 2012 22:32:57 +0000 (00:32 +0200)]
kmsg - kmsg_dump() fix CONFIG_PRINTK=n compilation

Signed-off-by: Kay Sievers <kay@vrfy.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Reported-by: Fengguang Wu <wfg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
12 years agocgroups: Account for CSS_DEACT_BIAS in __css_put
Salman Qazi [Thu, 14 Jun 2012 21:55:30 +0000 (14:55 -0700)]
cgroups: Account for CSS_DEACT_BIAS in __css_put

When we fixed the race between atomic_dec and css_refcnt, we missed
the fact that css_refcnt internally subtracts CSS_DEACT_BIAS to get
the actual reference count.  This can potentially cause a refcount leak
if __css_put races with cgroup_clear_css_refs.

Signed-off-by: Salman Qazi <sqazi@google.com>
Acked-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac
Linus Torvalds [Mon, 18 Jun 2012 20:34:25 +0000 (13:34 -0700)]
Merge git://git./linux/kernel/git/mchehab/linux-edac

Pull EDAC fixes from Mauro Carvalho Chehab.

* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac:
  edac: Do alignment logic properly in edac_align_ptr()
  mpc85xx_edac: fix error: too few arguments to function 'edac_mc_alloc'
  edac: fix the error about memory type detection on SandyBridge
  edac: avoid mce decoding crash after edac driver unloaded

12 years agoMerge branch 'v9fs-devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh...
Linus Torvalds [Mon, 18 Jun 2012 19:21:25 +0000 (12:21 -0700)]
Merge branch 'v9fs-devel' of git://git./linux/kernel/git/ericvh/v9fs

Pull a 9p bugfix from Eric Van Hensbergen.

* 'v9fs-devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: BUG before corrupting memory

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Mon, 18 Jun 2012 19:20:36 +0000 (12:20 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

Pull a crypto fix from Herbert Xu:
 "This push fixes another bug in the atmel-rng that made it produce
  completely useless output."

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  hwrng: atmel-rng - fix data valid check

12 years agoMerge tag 'mmc-fixes-for-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 18 Jun 2012 18:53:34 +0000 (11:53 -0700)]
Merge tag 'mmc-fixes-for-3.5-rc4' of git://git./linux/kernel/git/cjb/mmc

Pull MMC fixes from Chris Ball:
 - atmel-mci: Fixes for NULL timer and DMA burst/chunk size
 - dw_mmc: Fix DMA ordering, clkdiv calculation, NULL host->data
 - mxs_mmc: Compile fix for CONFIG_OF=y && CONFIG_PM=n
 - omap: Fix NULL deref in mmc_omap_remove_slot(), reg_shift initialization
 - sdhci-s3c: Fix boot regression by adding IRQF_ONESHOT flag
 - Small fixes to core/sd, core/sdio, sdhci

* tag 'mmc-fixes-for-3.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
  mmc: mxs-mmc: Move of_match_table out of CONFIG_PM
  mmc: sdhci-s3c: pass IRQF ONESHOT to request threaded irq
  mmc: core: return an error on suspend if mmc_deselect_cards fails
  mmc: omap: Fix broken reg_shift initialization
  mmc: omap: Fix NULL pointer dereference if mmc_omap_new_slot() fails
  mmc: omap: Fix a section warning regression
  mmc: dw_mmc: correct the calculation for CLKDIV
  mmc: dw_mmc: fix incorrect setting of host->data of NULL
  mmc: dw_mmc: fix the IDMAC sw reset
  mmc: dw_mmc: fix the transmission handling in IDMAC
  mmc: sdio: fix setting card data bus width as 4-bit
  mmc: atmel-mci: fix burst/chunk size modification
  mmc: atmel-mci: fix data timeout issue
  mmc: sdhci: Use DBG() instead of pr_warning() on large timeout

12 years agoMerge tag 'rproc-fixes-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 18 Jun 2012 18:52:25 +0000 (11:52 -0700)]
Merge tag 'rproc-fixes-for-3.5' of git://git./linux/kernel/git/ohad/remoteproc

Pull remoteproc fixes from Ohad Ben-Cohen:
 "A few relatively-small remoteproc fixes for 3.5: two error path fixes,
  and one -Wformat warning fix."

* tag 'rproc-fixes-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
  remoteproc/omap: fix dev_err typo
  remoteproc: fix missing fault indication in error-path
  remoteproc: fix print format warnings

12 years agoMerge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelv...
Linus Torvalds [Mon, 18 Jun 2012 18:51:10 +0000 (11:51 -0700)]
Merge branch 'hwmon-for-linus' of git://git./linux/kernel/git/jdelvare/staging

Pull hwmon subsystem fixes from Jean Delvare.

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (coretemp) Drop needless initialization
  hwmon: (coretemp) Document TjMax for 3rd generation i5/i7 processors
  hwmon: (coretemp) Improve support for TjMax detection on Atom CPUs
  hwmon: (coretemp) Add support for Atom D2000 and N2000 series CPU models
  hwmon: (coretemp) Improve support of recent Atom CPU models

12 years agobug.h: Fix up powerpc build regression.
Paul Mundt [Mon, 18 Jun 2012 04:54:17 +0000 (13:54 +0900)]
bug.h: Fix up powerpc build regression.

The asm-generic/bug.h __ASSEMBLY__ guarding is completely bogus, which
tripped up the powerpc build when the kernel.h include was added:

In file included from include/asm-generic/bug.h:5:0,
 from arch/powerpc/include/asm/bug.h:127,
 from arch/powerpc/kernel/head_64.S:31:
include/linux/kernel.h:44:0: warning: "ALIGN" redefined [enabled by default]
include/linux/linkage.h:57:0: note: this is the location of the previous definition
include/linux/sysinfo.h: Assembler messages:
include/linux/sysinfo.h:7: Error: Unrecognized opcode: `struct'
include/linux/sysinfo.h:8: Error: Unrecognized opcode: `__kernel_long_t'

Moving the __ASSEMBLY__ guard up and stashing the kernel.h include under
it fixes this up, as well as covering the case the original fix was
attempting to handle.

Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMakefile: fix up CROSS_COMPILE and READABLE_ASM interaction.
Paul Mundt [Mon, 18 Jun 2012 04:48:08 +0000 (13:48 +0900)]
Makefile: fix up CROSS_COMPILE and READABLE_ASM interaction.

When the READABLE_ASM cc-option tests were added they were done so prior
to the arch Makefile include, resulting in cc-option being run on the
host cc instead of the factoring in the cross prefix set up by the
architecture.

This bumps the include back up so that cc-option actually runs on the
compiler that we're building with.

Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agohwmon: (emc2103) Fix use of an uninitilized variable in error case
Guenter Roeck [Sat, 2 Jun 2012 17:16:32 +0000 (10:16 -0700)]
hwmon: (emc2103) Fix use of an uninitilized variable in error case

Fix:

emc2103.c: In function set_pwm_enable:
emc2103.c:463:12: warning: conf_reg may be used uninitialized in this function

by checking the return value from read_u8_from_i2c(). This fixes a real problem,
as conf_reg is really uninitialized if read_u8_from_i2c returns an error.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
12 years agohwmon: (applesmc) Limit key length in warning messages
Henrik Rydberg [Thu, 7 Jun 2012 08:54:29 +0000 (04:54 -0400)]
hwmon: (applesmc) Limit key length in warning messages

Key lookups may call read_smc() with a fixed-length key string,
and if the lookup fails, trailing stack content may appear in the
kernel log. Fixed with this patch.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
12 years agoftrace: Make all inline tags also include notrace
Steven Rostedt [Thu, 14 Jun 2012 14:54:28 +0000 (10:54 -0400)]
ftrace: Make all inline tags also include notrace

Commit 5963e317b1e9d2a ("ftrace/x86: Do not change stacks in DEBUG when
calling lockdep") prevented lockdep calls from the int3 breakpoint handler
from reseting the stack if a function that was called was in the process
of being converted for tracing and had a breakpoint on it. The idea is,
before calling the lockdep code, do a load_idt() to the special IDT that
kept the breakpoint stack from reseting. This worked well as a quick fix
for this kernel release, until a certain config caused a lockup in the
function tracer start up tests.

Investigating it, I found that the load_idt that was used to prevent
the int3 from changing stacks was itself being traced!

Even though the config had CONFIG_OPTIMIZE_INLINING disabled, and
all 'inline' tags were set to always inline, there were still cases that
it did not inline! This was caused by CONFIG_PARAVIRT_GUEST, where it
would add a pointer to the native_load_idt() which made that function
to be traced.

Commit 45959ee7aa645815a ("ftrace: Do not function trace inlined functions")
only touched the 'inline' tags when CONFIG_OPMITIZE_INLINING was enabled.
PARAVIRT_GUEST shows that this was not enough and we need to also
mark always_inline with notrace as well.

Reported-by: Fengguang Wu <wfg@linux.intel.com>
Tested-by: Fengguang Wu <wfg@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
12 years agoNFSv4.1: Fix umount when filelayout DS is also the MDS
Trond Myklebust [Thu, 14 Jun 2012 17:08:38 +0000 (13:08 -0400)]
NFSv4.1: Fix umount when filelayout DS is also the MDS

Currently there is a 'chicken and egg' issue when the DS is also the mounted
MDS. The nfs_match_client() reference from nfs4_set_ds_client bumps the
cl_count, the nfs_client is not freed at umount, and nfs4_deviceid_purge_client
is not called to dereference the MDS usage of a deviceid which holds a
reference to the DS nfs_client.  The result is the umount program returns,
but the nfs_client is not freed, and the cl_session hearbeat continues.

The MDS (and all other nfs mounts) lose their last nfs_client reference in
nfs_free_server when the last nfs_server (fsid) is umounted.
The file layout DS lose their last nfs_client reference in destroy_ds
when the last deviceid referencing the data server is put and destroy_ds is
called. This is triggered by a call to nfs4_deviceid_purge_client which
removes references to a pNFS deviceid used by an MDS mount.

The fix is to track how many pnfs enabled filesystems are mounted from
this server, and then to purge the device id cache once that count reaches
zero.

Reported-by: Jorge Mora <Jorge.Mora@netapp.com>
Reported-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoSPI: fix over-eager devm_xxx() conversion
Russell King [Mon, 18 Jun 2012 10:27:04 +0000 (11:27 +0100)]
SPI: fix over-eager devm_xxx() conversion

1a77b127ae (OMAP : SPI : use devm_* functions) converted the SPI
device controller state to use devm_kzalloc().  Unfortunately, this
is used against an unbound struct device, which results in the
following when the device is bound to its driver:

------------[ cut here ]------------
WARNING: at /home/rmk/git/linux-rmk/drivers/base/dd.c:257 driver_probe_device+0x78/0x21c()
Modules linked in:
Backtrace:
[<c0017d0c>] (dump_backtrace+0x0/0x10c) from [<c033e208>] (dump_stack+0x18/0x1c) r7:00000000 r6:c01ff28c r5:c040050c r4:00000101
[<c033e1f0>] (dump_stack+0x0/0x1c) from [<c00337ec>] (warn_slowpath_common+0x58/0x70)
[<c0033794>] (warn_slowpath_common+0x0/0x70) from [<c0033828>] (warn_slowpath_null+0x24/0x2c)
[<c0033804>] (warn_slowpath_null+0x0/0x2c) from [<c01ff28c>] (driver_probe_device+0x78/0x21c)
[<c01ff214>] (driver_probe_device+0x0/0x21c) from [<c01ff49c>] (__driver_attach+0x6c/0x90)
[<c01ff430>] (__driver_attach+0x0/0x90) from [<c01fda70>] (bus_for_each_dev+0x58/0x98)
[<c01fda18>] (bus_for_each_dev+0x0/0x98) from [<c01ff0f4>] (driver_attach+0x20/0x28)
[<c01ff0d4>] (driver_attach+0x0/0x28) from [<c01fe2f4>] (bus_add_driver+0xb4/0x230)
[<c01fe240>] (bus_add_driver+0x0/0x230) from [<c01ffb24>] (driver_register+0xac/0x138)
[<c01ffa78>] (driver_register+0x0/0x138) from [<c0215d4c>] (spi_register_driver+0x4c/0x60)
[<c0215d00>] (spi_register_driver+0x0/0x60) from [<c045414c>] (ks8851_init+0x14/0x1c)
[<c0454138>] (ks8851_init+0x0/0x1c) from [<c0008770>] (do_one_initcall+0x9c/0x164)
[<c00086d4>] (do_one_initcall+0x0/0x164) from [<c0436410>] (kernel_init+0x128/0x210)
[<c04362e8>] (kernel_init+0x0/0x210) from [<c0038754>] (do_exit+0x0/0x72c)
---[ end trace 4dcda79f5e89dd84 ]---
ks8851 spi1.0: message enable is 0
ks8851 spi1.0: eth0: revision 0, MAC 08:00:28:01:4d:c6, IRQ 194, has EEPROM

Fix this by partially reverting the original commit.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
12 years agoperf: Use css_tryget() to avoid propping up css refcount
Salman Qazi [Thu, 14 Jun 2012 22:31:09 +0000 (15:31 -0700)]
perf: Use css_tryget() to avoid propping up css refcount

An rmdir pushes css's ref count to zero.  However, if the associated
directory is open at the time, the dentry ref count is non-zero.  If
the fd for this directory is then passed into perf_event_open, it
does a css_get().  This bounces the ref count back up from zero.  This
is a problem by itself.  But what makes it turn into a crash is the
fact that we end up doing an extra dput, since we perform a dput
when css_put sees the ref count go down to zero.

css_tryget() does not fall into that trap. So, we use that instead.

Reproduction test-case for the bug:

 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <linux/unistd.h>
 #include <linux/perf_event.h>
 #include <string.h>
 #include <errno.h>
 #include <stdio.h>

 #define PERF_FLAG_PID_CGROUP    (1U << 2)

 int perf_event_open(struct perf_event_attr *hw_event_uptr,
                     pid_t pid, int cpu, int group_fd, unsigned long flags) {
         return syscall(__NR_perf_event_open,hw_event_uptr, pid, cpu,
                 group_fd, flags);
 }

 /*
  * Directly poke at the perf_event bug, since it's proving hard to repro
  * depending on where in the kernel tree.  what moved?
  */
 int main(int argc, char **argv)
 {
        int fd;
        struct perf_event_attr attr;
        memset(&attr, 0, sizeof(attr));
        attr.exclude_kernel = 1;
        attr.size = sizeof(attr);
        mkdir("/dev/cgroup/perf_event/blah", 0777);
        fd = open("/dev/cgroup/perf_event/blah", O_RDONLY);
        perror("open");
        rmdir("/dev/cgroup/perf_event/blah");
        sleep(2);
        perf_event_open(&attr, fd, 0, -1,  PERF_FLAG_PID_CGROUP);
        perror("perf_event_open");
        close(fd);
        return 0;
 }

Signed-off-by: Salman Qazi <sqazi@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20120614223108.1025.2503.stgit@dungbeetle.mtv.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
12 years agoALSA: 6fire: use NULL instead of 0 for pointer assignment
Daniel Mack [Sat, 16 Jun 2012 14:58:36 +0000 (16:58 +0200)]
ALSA: 6fire: use NULL instead of 0 for pointer assignment

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoALSA: hda - Handle open while transitioning to D3.
Dylan Reid [Sat, 16 Jun 2012 02:36:23 +0000 (19:36 -0700)]
ALSA: hda - Handle open while transitioning to D3.

This addresses an issue encountered when a pcm is opened while
transitioning to low power state (codec->power_on == 1 &&
codec->power_transition == -1).  Add snd_pcm_power_up_d3wait to
hda_codec.  This function is used to power up from azx_open as opposed
to snd_hda_power_up used from codec_exec_verb. When powering up from
azx_open, wait for pending power downs to complete, avoiding the power
up continuing in parallel with the power down on the work queue.

The specific issue seen was with the CS4210 codec, it powers off the ADC
and DAC nid in its suspend handler.  If it is re-opened before the
~100ms power down process completes, the ADC and DAC nid are initialized
while powered down and audio is lost until another suspend/resume cycle.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoALSA: snd-usb: make snd_usb_substream_capture_trigger static
Daniel Mack [Sat, 16 Jun 2012 14:58:04 +0000 (16:58 +0200)]
ALSA: snd-usb: make snd_usb_substream_capture_trigger static

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoALSA: snd-usb: fix sync pipe check
Daniel Mack [Sun, 17 Jun 2012 11:44:27 +0000 (13:44 +0200)]
ALSA: snd-usb: fix sync pipe check

Fix a bogus sanity check for sync pipe in pcm.c. This flaw was
introduced during the streaming logic refactorization.

While at it, improve the error messages that are generated in such cases.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-and-tested-by: <ben@b1c1l1.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoMerge tag 'asoc-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound...
Takashi Iwai [Mon, 18 Jun 2012 06:36:00 +0000 (08:36 +0200)]
Merge tag 'asoc-3.5' of git://git./linux/kernel/git/broonie/sound into for-linus

ASoC: Updates for 3.5

All driver specific and fairly small.  The pxa-ssp changes are larger
than I'd like but they're build failures and are pretty clear to
inspection.

12 years agoMerge branch 'hfsplus'
Linus Torvalds [Sun, 17 Jun 2012 21:40:35 +0000 (14:40 -0700)]
Merge branch 'hfsplus'

Merge hfsplus fixes from Christoph Hellwig:
 "Two small hfsplus fixes:

   - a one liner regression fix for large volume handling from Janne
     Kalliomäki.
   - a fixup for the boot image blessing feature to make it work with
     the fake "hardlinks" in hfsplus from Matthew Garrett."

* branch 'hfsplus':
  hfsplus: fix bless ioctl when used with hardlinks
  hfsplus: fix overflow in sector calculations in hfsplus_submit_bio

12 years agohfsplus: fix bless ioctl when used with hardlinks
Matthew Garrett [Sun, 17 Jun 2012 21:05:25 +0000 (17:05 -0400)]
hfsplus: fix bless ioctl when used with hardlinks

HFS+ doesn't really implement hard links - instead, hardlinks are indicated
by a magic file type which refers to an indirect node in a hidden
directory. The spec indicates that stat() should return the inode number
of the indirect node, but it turns out that this doesn't satisfy the
firmware when it's looking for a bootloader - it wants the catalog ID of
the hardlink file instead. Fix up this case.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agohfsplus: fix overflow in sector calculations in hfsplus_submit_bio
Janne Kalliomäki [Sun, 17 Jun 2012 21:05:24 +0000 (17:05 -0400)]
hfsplus: fix overflow in sector calculations in hfsplus_submit_bio

The variable io_size was unsigned int, which caused the wrong sector number
to be calculated after aligning it. This then caused mount to fail with big
volumes, as backup volume header information was searched from a
wrong sector.

Signed-off-by: Janne Kalliomäki <janne@tuxera.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoARM: 7427/1: mmc: mmci: Defer probe() in case of yet uninitialized GPIOs
Roland Stigge [Sun, 17 Jun 2012 20:14:27 +0000 (21:14 +0100)]
ARM: 7427/1: mmc: mmci: Defer probe() in case of yet uninitialized GPIOs

If the GPIOs used by the MMCI driver are not registered yet when the driver is
probe()d, they can't be used. This happens if the mmci driver is probed before
the respective GPIO controller (e.g. on the LPC32xx EA3250 board, the PCA9532
GPIO controller would be initialized via DT after mmci). Therefore, we defer
mmci in this case.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
12 years agoARM: 7426/1: mmc: mmci: Remove wrong error handling of gpio 0
Roland Stigge [Sun, 17 Jun 2012 20:13:34 +0000 (21:13 +0100)]
ARM: 7426/1: mmc: mmci: Remove wrong error handling of gpio 0

Zero is a valid GPIO and shouldn't be handled as an error return code from
of_get_named_gpio(). It was a leftover from old code before getting
pdata->gpio_*() was modified.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
12 years agopinctrl/nomadik: document Alt-C glitch
Linus Walleij [Tue, 22 May 2012 09:46:45 +0000 (11:46 +0200)]
pinctrl/nomadik: document Alt-C glitch

This documentation comment existed in an earlier patch set for
GPIO consolidation, so I'm saving it for maintainability of the
code.

Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
12 years agopinctrl: mxs: Use kfree to fix build error
Fabio Estevam [Wed, 13 Jun 2012 17:06:07 +0000 (14:06 -0300)]
pinctrl: mxs: Use kfree to fix build error

commit 0bf7481 (pinctrl: pinctrl-mxs: Take care of frees if the kzalloc fails)
introduced the following build error:

drivers/pinctrl/pinctrl-mxs.c:140:3: error: implicit declaration of function 'free'

Use kfree function instead.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
12 years agoregulator: Change db8500-prcmu match names to reflect Device Tree
Lee Jones [Wed, 30 May 2012 04:47:27 +0000 (12:47 +0800)]
regulator: Change db8500-prcmu match names to reflect Device Tree

The 'name' field in 'struct of_regulator_match' expects to match with
its corresponding regulator device node in the Device Tree. This patch
renames each of the regulators in the db8500-prcum regulator driver so
this is true.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
12 years agoregulator: Change ab8500 match names to reflect Device Tree
Lee Jones [Wed, 30 May 2012 04:47:26 +0000 (12:47 +0800)]
regulator: Change ab8500 match names to reflect Device Tree

The 'name' field in 'struct of_regulator_match' expects to match with
its corresponding regulator device node in the Device Tree. This patch
renames each of the regulators in the ab8500 regulator driver so this
is true.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
12 years agoregulator: Fix the s5m8767a problem of the division by null
Sangbeom Kim [Wed, 13 Jun 2012 08:27:16 +0000 (17:27 +0900)]
regulator: Fix the s5m8767a problem of the division by null

If ramp_delay is 0, delay value can be divided by zero.
This patch can fix the problem.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>