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Frederic Weisbecker [Tue, 24 Apr 2012 23:11:36 +0000 (01:11 +0200)]
res_counter: Account max_usage when calling res_counter_charge_nofail()
Updating max_usage is something one would expect when we reach
a new maximum usage value even when we do this by forcing through
the limit with res_counter_charge_nofail().
(Whether we want to account failcnt when we force through the limit
is another debate).
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Glauber Costa <glommer@parallels.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Li Zefan <lizefan@huawei.com>
Frederic Weisbecker [Tue, 24 Apr 2012 23:11:35 +0000 (01:11 +0200)]
res_counter: Merge res_counter_charge and res_counter_charge_nofail
These two functions do almost the same thing and duplicate some code.
Merge their implementation into a single common function.
res_counter_charge_locked() takes one more parameter but it doesn't seem
to be used outside res_counter.c yet anyway.
There is no (intended) change in the behaviour.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Glauber Costa <glommer@parallels.com>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Li Zefan <lizefan@huawei.com>
Mike Galbraith [Sat, 21 Apr 2012 07:13:46 +0000 (09:13 +0200)]
cgroups: disallow attaching kthreadd or PF_THREAD_BOUND threads
Allowing kthreadd to be moved to a non-root group makes no sense, it being
a global resource, and needlessly leads unsuspecting users toward trouble.
1. An RT workqueue worker thread spawned in a task group with no rt_runtime
allocated is not schedulable. Simple user error, but harmful to the box.
2. A worker thread which acquires PF_THREAD_BOUND can never leave a cpuset,
rendering the cpuset immortal.
Save the user some unexpected trouble, just say no.
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Tejun Heo [Tue, 10 Apr 2012 17:16:36 +0000 (10:16 -0700)]
cgroup: remove cgroup_subsys->populate()
With memcg converted, cgroup_subsys->populate() doesn't have any user
left. Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Glauber Costa [Mon, 9 Apr 2012 22:36:34 +0000 (19:36 -0300)]
cgroup: get rid of populate for memcg
The last man standing justifying the need for populate() is the
sock memcg initialization functions. Now that we are able to pass
a struct mem_cgroup instead of a struct cgroup to the socket
initialization, there is nothing that stops us from initializing
everything in create().
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
CC: Li Zefan <lizefan@huawei.com>
CC: Johannes Weiner <hannes@cmpxchg.org>
CC: Michal Hocko <mhocko@suse.cz>
Glauber Costa [Mon, 9 Apr 2012 22:36:33 +0000 (19:36 -0300)]
cgroup: pass struct mem_cgroup instead of struct cgroup to socket memcg
The only reason cgroup was used, was to be consistent with the populate()
interface. Now that we're getting rid of it, not only we no longer need
it, but we also *can't* call it this way.
Since we will no longer rely on populate(), this will be called from
create(). During create, the association between struct mem_cgroup
and struct cgroup does not yet exist, since cgroup internals hasn't
yet initialized its bookkeeping. This means we would not be able
to draw the memcg pointer from the cgroup pointer in these
functions, which is highly undesirable.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
CC: Li Zefan <lizefan@huawei.com>
CC: Johannes Weiner <hannes@cmpxchg.org>
CC: Michal Hocko <mhocko@suse.cz>
Tejun Heo [Sun, 1 Apr 2012 19:09:56 +0000 (12:09 -0700)]
cgroup: make css->refcnt clearing on cgroup removal optional
Currently, cgroup removal tries to drain all css references. If there
are active css references, the removal logic waits and retries
->pre_detroy() until either all refs drop to zero or removal is
cancelled.
This semantics is unusual and adds non-trivial complexity to cgroup
core and IMHO is fundamentally misguided in that it couples internal
implementation details (references to internal data structure) with
externally visible operation (rmdir). To userland, this is a behavior
peculiarity which is unnecessary and difficult to expect (css refs is
otherwise invisible from userland), and, to policy implementations,
this is an unnecessary restriction (e.g. blkcg wants to hold css refs
for caching purposes but can't as that becomes visible as rmdir hang).
Unfortunately, memcg currently depends on ->pre_destroy() retrials and
cgroup removal vetoing and can't be immmediately switched to the new
behavior. This patch introduces the new behavior of not waiting for
css refs to drain and maintains the old behavior for subsystems which
have __DEPRECATED_clear_css_refs set.
Once, memcg is updated, we can drop the code paths for the old
behavior as proposed in the following patch. Note that the following
patch is incorrect in that dput work item is in cgroup and may lose
some of dputs when multiples css's are released back-to-back, and
__css_put() triggers check_for_release() when refcnt reaches 0 instead
of 1; however, it shows what part can be removed.
http://thread.gmane.org/gmane.linux.kernel.containers/22559/focus=75251
Note that, in not-too-distant future, cgroup core will start emitting
warning messages for subsys which require the old behavior, so please
get moving.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:56 +0000 (12:09 -0700)]
cgroup: use negative bias on css->refcnt to block css_tryget()
When a cgroup is about to be removed, cgroup_clear_css_refs() is
called to check and ensure that there are no active css references.
This is currently achieved by dropping the refcnt to zero iff it has
only the base ref. If all css refs could be dropped to zero, ref
clearing is successful and CSS_REMOVED is set on all css. If not, the
base ref is restored. While css ref is zero w/o CSS_REMOVED set, any
css_tryget() attempt on it busy loops so that they are atomic
w.r.t. the whole css ref clearing.
This does work but dropping and re-instating the base ref is somewhat
hairy and makes it difficult to add more logic to the put path as
there are two of them - the regular css_put() and the reversible base
ref clearing.
This patch updates css ref clearing such that blocking new
css_tryget() and putting the base ref are separate operations.
CSS_DEACT_BIAS, defined as INT_MIN, is added to css->refcnt and
css_tryget() busy loops while refcnt is negative. After all css refs
are deactivated, if they were all one, ref clearing succeeded and
CSS_REMOVED is set and the base ref is put using the regular
css_put(); otherwise, CSS_DEACT_BIAS is subtracted from the refcnts
and the original postive values are restored.
css_refcnt() accessor which always returns the unbiased positive
reference counts is added and used to simplify refcnt usages. While
at it, relocate and reformat comments in cgroup_has_css_refs().
This separates css->refcnt deactivation and putting the base ref,
which enables the next patch to make ref clearing optional.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:56 +0000 (12:09 -0700)]
cgroup: implement cgroup_rm_cftypes()
Implement cgroup_rm_cftypes() which removes an array of cftypes from a
subsystem. It can be called whether the target subsys is attached or
not. cgroup core will remove the specified file from all existing
cgroups.
This will be used to improve sub-subsys modularity and will be helpful
for unified hierarchy.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:56 +0000 (12:09 -0700)]
cgroup: introduce struct cfent
This patch adds cfent (cgroup file entry) which is the association
between a cgroup and a file. This is in-cgroup representation of
files under a cgroup directory. This simplifies walking walking
cgroup files and thus cgroup_clear_directory(), which is now
implemented in two parts - cgroup_rm_file() and a loop around it.
cgroup_rm_file() will be used to implement cftype removal and cfent is
scheduled to serve cgroup specific per-file data (e.g. for sysfs-like
"sever" semantics).
v2: - cfe was freed from cgroup_rm_file() which led to use-after-free
if the file had openers at the time of removal. Moved to
cgroup_diput().
- cgroup_clear_directory() triggered WARN_ON_ONCE() if d_subdirs
wasn't empty after removing all files. This triggered
spuriously if some files were open during directory clearing.
Removed.
v3: - In cgroup_diput(), WARN_ONCE(!list_empty(&cfe->node)) could be
spuriously triggered for root cgroups because they don't go
through cgroup_clear_directory() on unmount. Don't trigger WARN
for root cgroups.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Glauber Costa <glommer@parallels.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: relocate __d_cgrp() and __d_cft()
Move the two macros upwards as they'll be used earlier in the file.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: remove cgroup_add_file[s]()
No controller is using cgroup_add_files[s](). Unexport them, and
convert cgroup_add_files() to handle NULL entry terminated array
instead of taking count explicitly and continue creation on failure
for internal use.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: convert memcg controller to the new cftype interface
Convert memcg to use the new cftype based interface. kmem support
abuses ->populate() for mem_cgroup_sockets_init() so it can't be
removed at the moment.
tcp_memcontrol is updated so that tcp_files[] is registered via a
__initcall. This change also allows removing the forward declaration
of tcp_files[]. Removed.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Greg Thelen <gthelen@google.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
memcg: always create memsw files if CONFIG_CGROUP_MEM_RES_CTLR_SWAP
Instead of conditioning creation of memsw files on do_swap_account,
always create the files if compiled-in and fail read/write attempts
with -EOPNOTSUPP if !do_swap_account.
This is suggested by KAMEZAWA to simplify memcg file creation so that
it can use cgroup->subsys_cftypes.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: convert all non-memcg controllers to the new cftype interface
Convert debug, freezer, cpuset, cpu_cgroup, cpuacct, net_prio, blkio,
net_cls and device controllers to use the new cftype based interface.
Termination entry is added to cftype arrays and populate callbacks are
replaced with cgroup_subsys->base_cftypes initializations.
This is functionally identical transformation. There shouldn't be any
visible behavior change.
memcg is rather special and will be converted separately.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <paul@paulmenage.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Vivek Goyal <vgoyal@redhat.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: relocate cftype and cgroup_subsys definitions in controllers
blk-cgroup, netprio_cgroup, cls_cgroup and tcp_memcontrol
unnecessarily define cftype array and cgroup_subsys structures at the
top of the file, which is unconventional and necessiates forward
declaration of methods.
This patch relocates those below the definitions of the methods and
removes the forward declarations. Note that forward declaration of
tcp_files[] is added in tcp_memcontrol.c for tcp_init_cgroup(). This
will be removed soon by another patch.
This patch doesn't introduce any functional change.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: merge cft_release_agent cftype array into the base files array
Now that cftype can express whether a file should only be on root,
cft_release_agent can be merged into the base files cftypes array.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:55 +0000 (12:09 -0700)]
cgroup: implement cgroup_add_cftypes() and friends
Currently, cgroup directories are populated by subsys->populate()
callback explicitly creating files on each cgroup creation. This
level of flexibility isn't needed or desirable. It provides largely
unused flexibility which call for abuses while severely limiting what
the core layer can do through the lack of structure and conventions.
Per each cgroup file type, the only distinction that cgroup users is
making is whether a cgroup is root or not, which can easily be
expressed with flags.
This patch introduces cgroup_add_cftypes(). These deal with cftypes
instead of individual files - controllers indicate that certain types
of files exist for certain subsystem. Newly added CFTYPE_*_ON_ROOT
flags indicate whether a cftype should be excluded or created only on
the root cgroup.
cgroup_add_cftypes() can be called any time whether the target
subsystem is currently attached or not. cgroup core will create files
on the existing cgroups as necessary.
Also, cgroup_subsys->base_cftypes is added to ease registration of the
base files for the subsystem. If non-NULL on subsys init, the cftypes
pointed to by ->base_cftypes are automatically registered on subsys
init / load.
Further patches will convert the existing users and remove the file
based interface. Note that this interface allows dynamic addition of
files to an active controller. This will be used for sub-controller
modularity and unified hierarchy in the longer term.
This patch implements the new mechanism but doesn't apply it to any
user.
v2: replaced DECLARE_CGROUP_CFTYPES[_COND]() with
cgroup_subsys->base_cftypes, which works better for cgroup_subsys
which is loaded as module.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:54 +0000 (12:09 -0700)]
cgroup: build list of all cgroups under a given cgroupfs_root
Build a list of all cgroups anchored at cgroupfs_root->allcg_list and
going through cgroup->allcg_node. The list is protected by
cgroup_mutex and will be used to improve cgroup file handling.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:54 +0000 (12:09 -0700)]
cgroup: move cgroup_clear_directory() call out of cgroup_populate_dir()
cgroup_populate_dir() currently clears all files and then repopulate
the directory; however, the clearing part is only useful when it's
called from cgroup_remount(). Relocate the invocation to
cgroup_remount().
This is to prepare for further cgroup file handling updates.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Tejun Heo [Sun, 1 Apr 2012 19:09:54 +0000 (12:09 -0700)]
cgroup: deprecate remount option changes
This patch marks the following features for deprecation.
* Rebinding subsys by remount: Never reached useful state - only works
on empty hierarchies.
* release_agent update by remount: release_agent itself will be
replaced with conventional fsnotify notification.
v2: Lennart pointed out that "name=" is necessary for mounts w/o any
controller attached. Drop "name=" deprecation.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lennart Poettering <mzxreary@0pointer.de>
Linus Torvalds [Sat, 31 Mar 2012 23:24:09 +0000 (16:24 -0700)]
Linux 3.4-rc1
Linus Torvalds [Sat, 31 Mar 2012 22:11:39 +0000 (15:11 -0700)]
Merge branch 's3-for-3.4' of git://git./linux/kernel/git/amit/virtio-console
Pull virtio S3 support patches from Amit Shah:
"Turns out S3 is not different from S4 for virtio devices: the device
is assumed to be reset, so the host and guest state are to be assumed
to be out of sync upon resume. We handle the S4 case with exactly the
same scenario, so just point the suspend/resume routines to the
freeze/restore ones.
Once that is done, we also use the PM API's macro to initialise the
sleep functions.
A couple of cleanups are included: there's no need for special thaw
processing in the balloon driver, so that's addressed in patches 1 and
2.
Testing: both S3 and S4 support have been tested using these patches
using a similar method used earlier during S4 patch development: a
guest is started with virtio-blk as the only disk, a virtio network
card, a virtio-serial port and a virtio balloon device. Ping from
guest to host, dd /dev/zero to a file on the disk, and IO from the
host on the virtio-serial port, all at once, while exercising S4 and
S3 (separately) were tested. They all continue to work fine after
resume. virtio balloon values too were tested by inflating and
deflating the balloon."
Pulling from Amit, since Rusty is off getting married (and presumably
shaving people).
* 's3-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/amit/virtio-console:
virtio-pci: switch to PM ops macro to initialise PM functions
virtio-pci: S3 support
virtio-pci: drop restore_common()
virtio: drop thaw PM operation
virtio: balloon: Allow stats update after restore from S4
Linus Torvalds [Sat, 31 Mar 2012 20:42:57 +0000 (13:42 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs
Pull second try at vfs part d#2 from Al Viro:
"Miklos' first series (with do_lookup() rewrite split into edible
chunks) + assorted bits and pieces.
The 'untangling of do_lookup()' series is is a splitup of what used to
be a monolithic patch from Miklos, so this series is basically "how do
I convince myself that his patch is correct (or find a hole in it)".
No holes found and I like the resulting cleanup, so in it went..."
Changes from try 1: Fix a boot problem with selinux, and commit messages
prettied up a bit.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (24 commits)
vfs: fix out-of-date dentry_unhash() comment
vfs: split __lookup_hash
untangling do_lookup() - take __lookup_hash()-calling case out of line.
untangling do_lookup() - switch to calling __lookup_hash()
untangling do_lookup() - merge d_alloc_and_lookup() callers
untangling do_lookup() - merge failure exits in !dentry case
untangling do_lookup() - massage !dentry case towards __lookup_hash()
untangling do_lookup() - get rid of need_reval in !dentry case
untangling do_lookup() - eliminate a loop.
untangling do_lookup() - expand the area under ->i_mutex
untangling do_lookup() - isolate !dentry stuff from the rest of it.
vfs: move MAY_EXEC check from __lookup_hash()
vfs: don't revalidate just looked up dentry
vfs: fix d_need_lookup/d_revalidate order in do_lookup
ext3: move headers to fs/ext3/
migrate ext2_fs.h guts to fs/ext2/ext2.h
new helper: ext2_image_size()
get rid of pointless includes of ext2_fs.h
ext2: No longer export ext2_fs.h to user space
mtdchar: kill persistently held vfsmount
...
Linus Torvalds [Sat, 31 Mar 2012 20:35:31 +0000 (13:35 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar.
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched: Fix incorrect usage of for_each_cpu_mask() in select_fallback_rq()
sched: Fix __schedule_bug() output when called from an interrupt
sched/arch: Introduce the finish_arch_post_lock_switch() scheduler callback
Linus Torvalds [Sat, 31 Mar 2012 20:34:04 +0000 (13:34 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf updates and fixes from Ingo Molnar:
"It's mostly fixes, but there's also two late items:
- preliminary GTK GUI support for perf report
- PMU raw event format descriptors in sysfs, to be parsed by tooling
The raw event format in sysfs is a new ABI. For example for the 'CPU'
PMU we have:
aldebaran:~> ll /sys/bus/event_source/devices/cpu/format/*
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/any
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/cmask
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/edge
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/event
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/inv
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/offcore_rsp
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/pc
-r--r--r--. 1 root root 4096 Mar 31 10:29 /sys/bus/event_source/devices/cpu/format/umask
those lists of fields contain a specific format:
aldebaran:~> cat /sys/bus/event_source/devices/cpu/format/offcore_rsp
config1:0-63
So, those who wish to specify raw events can now use the following
event format:
-e cpu/cmask=1,event=2,umask=3
Most people will not want to specify any events (let alone raw
events), they'll just use whatever default event the tools use.
But for more obscure PMU events that have no cross-architecture
generic events the above syntax is more usable and a bit more
structured than specifying hex numbers."
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
perf tools: Remove auto-generated bison/flex files
perf annotate: Fix off by one symbol hist size allocation and hit accounting
perf tools: Add missing ref-cycles event back to event parser
perf annotate: addr2line wants addresses in same format as objdump
perf probe: Finder fails to resolve function name to address
tracing: Fix ent_size in trace output
perf symbols: Handle NULL dso in dso__name_len
perf symbols: Do not include libgen.h
perf tools: Fix bug in raw sample parsing
perf tools: Fix display of first level of callchains
perf tools: Switch module.h into export.h
perf: Move mmap page data_head offset assertion out of header
perf: Fix mmap_page capabilities and docs
perf diff: Fix to work with new hists design
perf tools: Fix modifier to be applied on correct events
perf tools: Fix various casting issues for 32 bits
perf tools: Simplify event_read_id exit path
tracing: Fix ftrace stack trace entries
tracing: Move the tracing_on/off() declarations into CONFIG_TRACING
perf report: Add a simple GTK2-based 'perf report' browser
...
Linus Torvalds [Sat, 31 Mar 2012 20:32:30 +0000 (13:32 -0700)]
Merge tag 'parisc-misc' of git://git./linux/kernel/git/jejb/parisc-2.6
Pull PARISC misc updates from James Bottomley:
"This is a couple of minor updates (fixing lws futex locking and
removing some obsolete cpu_*_map calls)."
* tag 'parisc-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
[PARISC] remove references to cpu_*_map.
[PARISC] futex: Use same lock set as lws calls
Linus Torvalds [Sat, 31 Mar 2012 20:31:23 +0000 (13:31 -0700)]
Merge tag 'scsi-misc' of git://git./linux/kernel/git/jejb/scsi-misc-2.6
Pull SCSI updates from James Bottomley:
"This is primarily another round of driver updates (lpfc, bfa, fcoe,
ipr) plus a new ufshcd driver. There shouldn't be anything
controversial in here (The final deletion of scsi proc_ops which
caused some build breakage has been held over until the next merge
window to give us more time to stabilise it).
I'm afraid, with me moving continents at exactly the wrong time,
anything submitted after the merge window opened has been held over to
the next merge window."
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (63 commits)
[SCSI] ipr: Driver version 2.5.3
[SCSI] ipr: Increase alignment boundary of command blocks
[SCSI] ipr: Increase max concurrent oustanding commands
[SCSI] ipr: Remove unnecessary memory barriers
[SCSI] ipr: Remove unnecessary interrupt clearing on new adapters
[SCSI] ipr: Fix target id allocation re-use problem
[SCSI] atp870u, mpt2sas, qla4xxx use pci_dev->revision
[SCSI] fcoe: Drop the rtnl_mutex before calling fcoe_ctlr_link_up
[SCSI] bfa: Update the driver version to 3.0.23.0
[SCSI] bfa: BSG and User interface fixes.
[SCSI] bfa: Fix to avoid vport delete hang on request queue full scenario.
[SCSI] bfa: Move service parameter programming logic into firmware.
[SCSI] bfa: Revised Fabric Assigned Address(FAA) feature implementation.
[SCSI] bfa: Flash controller IOC pll init fixes.
[SCSI] bfa: Serialize the IOC hw semaphore unlock logic.
[SCSI] bfa: Modify ISR to process pending completions
[SCSI] bfa: Add fc host issue lip support
[SCSI] mpt2sas: remove extraneous sas_log_info messages
[SCSI] libfc: fcoe_transport_create fails in single-CPU environment
[SCSI] fcoe: reduce contention for fcoe_rx_list lock [v2]
...
J. Bruce Fields [Wed, 15 Feb 2012 16:48:40 +0000 (11:48 -0500)]
vfs: fix out-of-date dentry_unhash() comment
64252c75a2196a0cf1e0d3777143ecfe0e3ae650 "vfs: remove dget() from
dentry_unhash()" changed the implementation but not the comment.
Cc: Sage Weil <sage@newdream.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Miklos Szeredi [Mon, 26 Mar 2012 10:54:24 +0000 (12:54 +0200)]
vfs: split __lookup_hash
Split __lookup_hash into two component functions:
lookup_dcache - tries cached lookup, returns whether real lookup is needed
lookup_real - calls i_op->lookup
This eliminates code duplication between d_alloc_and_lookup() and
d_inode_lookup().
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:48:04 +0000 (14:48 -0400)]
untangling do_lookup() - take __lookup_hash()-calling case out of line.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:41:51 +0000 (14:41 -0400)]
untangling do_lookup() - switch to calling __lookup_hash()
now we have __lookup_hash() open-coded if !dentry case;
just call the damn thing instead...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:39:15 +0000 (14:39 -0400)]
untangling do_lookup() - merge d_alloc_and_lookup() callers
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:37:42 +0000 (14:37 -0400)]
untangling do_lookup() - merge failure exits in !dentry case
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:34:00 +0000 (14:34 -0400)]
untangling do_lookup() - massage !dentry case towards __lookup_hash()
Reorder if-else cases for starters...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:18:50 +0000 (14:18 -0400)]
untangling do_lookup() - get rid of need_reval in !dentry case
Everything arriving into if (!dentry) will have need_reval = 1.
Indeed, the only way to get there with need_reval reset to 0 would
be via
if (unlikely(d_need_lookup(dentry)))
goto unlazy;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
status = d_revalidate(dentry, nd);
if (unlikely(status <= 0)) {
if (status != -ECHILD)
need_reval = 0;
goto unlazy;
...
unlazy:
/* no assignments to dentry */
if (dentry && unlikely(d_need_lookup(dentry))) {
dput(dentry);
dentry = NULL;
}
and if d_need_lookup() had already been false the first time around, it
will remain false on the second call as well.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:13:15 +0000 (14:13 -0400)]
untangling do_lookup() - eliminate a loop.
d_lookup() *will* fail after successful d_invalidate(), if we are
holding i_mutex all along. IOW, we don't need to jump back to
l: - we know what path will be taken there and can do that (i.e.
d_alloc_and_lookup()) directly.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:08:28 +0000 (14:08 -0400)]
untangling do_lookup() - expand the area under ->i_mutex
keep holding ->i_mutex over revalidation parts
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 18:04:16 +0000 (14:04 -0400)]
untangling do_lookup() - isolate !dentry stuff from the rest of it.
Duplicate the revalidation-related parts into if (!dentry) branch.
Next step will be to pull them under i_mutex.
This and the next 8 commits are more or less a splitup of patch
by Miklos; folks, when you are working with something that convoluted,
carve your patches up into easily reviewed steps, especially when
a lot of codepaths involved are rarely hit...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Miklos Szeredi [Mon, 26 Mar 2012 10:54:21 +0000 (12:54 +0200)]
vfs: move MAY_EXEC check from __lookup_hash()
The only caller of __lookup_hash() that needs the exec permission check on
parent is lookup_one_len().
All lookup_hash() callers already checked permission in LOOKUP_PARENT walk.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Miklos Szeredi [Mon, 26 Mar 2012 10:54:20 +0000 (12:54 +0200)]
vfs: don't revalidate just looked up dentry
__lookup_hash() calls ->lookup() if the dentry needs lookup and on success
revalidates the dentry (all under dir->i_mutex).
While this is harmless it doesn't make a lot of sense.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Miklos Szeredi [Mon, 26 Mar 2012 10:54:19 +0000 (12:54 +0200)]
vfs: fix d_need_lookup/d_revalidate order in do_lookup
Doing revalidate on a dentry which has not yet been looked up makes no sense.
Move the d_need_lookup() check before d_revalidate().
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 30 Mar 2012 02:30:07 +0000 (22:30 -0400)]
ext3: move headers to fs/ext3/
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 23 Mar 2012 20:45:51 +0000 (16:45 -0400)]
migrate ext2_fs.h guts to fs/ext2/ext2.h
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 23 Mar 2012 20:36:45 +0000 (16:36 -0400)]
new helper: ext2_image_size()
... implemented that way since the next commit will leave it
almost alone in ext2_fs.h - most of the file (including
struct ext2_super_block) is going to move to fs/ext2/ext2.h.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 23 Mar 2012 20:04:05 +0000 (16:04 -0400)]
get rid of pointless includes of ext2_fs.h
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Thierry Reding [Fri, 23 Mar 2012 09:27:36 +0000 (10:27 +0100)]
ext2: No longer export ext2_fs.h to user space
Since the on-disk format has been stable for quite some time, users
should either use the headers provided by libext2fs or keep a private
copy of this header. For the full discussion, see this thread:
https://lkml.org/lkml/2012/3/21/516
While at it, this commit removes all __KERNEL__ guards, which are now
unnecessary.
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jan Kara <jack@suse.cz>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Andreas Dilger <aedilger@gmail.com>
Cc: linux-ext4@vger.kernel.org
Al Viro [Fri, 23 Mar 2012 17:47:52 +0000 (13:47 -0400)]
mtdchar: kill persistently held vfsmount
... and mtdchar_notifier along with it; just have ->drop_inode() that
will unconditionally get evict them instead of dances on mtd device
removal and use simple_pin_fs() instead of kern_mount()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Thu, 22 Mar 2012 16:26:35 +0000 (12:26 -0400)]
pstore: trim pstore_get_inode()
move mode-dependent parts to callers, kill unused arguments
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 20 Mar 2012 20:27:57 +0000 (16:27 -0400)]
aio: take final put_ioctx() into callers of io_destroy()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 20 Mar 2012 20:26:24 +0000 (16:26 -0400)]
aio: merge aio_cancel_all() with wait_for_all_aios()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 19 Mar 2012 00:36:59 +0000 (20:36 -0400)]
selinuxfs: merge dentry allocation into sel_make_dir()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Matthew Garrett [Tue, 27 Mar 2012 14:17:41 +0000 (10:17 -0400)]
ASPM: Fix pcie devices with non-pcie children
Since 3.2.12 and 3.3, some systems are failing to boot with a BUG_ON.
Some other systems using the pata_jmicron driver fail to boot because no
disks are detected. Passing pcie_aspm=force on the kernel command line
works around it.
The cause: commit
4949be16822e ("PCI: ignore pre-1.1 ASPM quirking when
ASPM is disabled") changed the behaviour of pcie_aspm_sanity_check() to
always return 0 if aspm is disabled, in order to avoid cases where we
changed ASPM state on pre-PCIe 1.1 devices.
This skipped the secondary function of pcie_aspm_sanity_check which was
to avoid us enabling ASPM on devices that had non-PCIe children, causing
trouble later on. Move the aspm_disabled check so we continue to honour
that scenario.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=42979 and
http://bugs.debian.org/665420
Reported-by: Romain Francoise <romain@orebokech.com> # kernel panic
Reported-by: Chris Holland <bandidoirlandes@gmail.com> # disk detection trouble
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: stable@vger.kernel.org
Tested-by: Hatem Masmoudi <hatem.masmoudi@gmail.com> # Dell Latitude E5520
Tested-by: janek <jan0x6c@gmail.com> # pata_jmicron with JMB362/JMB363
[jn: with more symptoms in log message]
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 31 Mar 2012 18:12:57 +0000 (11:12 -0700)]
selinux: inline avc_audit() and avc_has_perm_noaudit() into caller
Now that all the slow-path code is gone from these functions, we can
inline them into the main caller - avc_has_perm_flags().
Now the compiler can see that 'avc' is allocated on the stack for this
case, which helps register pressure a bit. It also actually shrinks the
total stack frame, because the stack frame that avc_has_perm_flags()
always needed (for that 'avc' allocation) is now sufficient for the
inlined functions too.
Inlining isn't bad - but mindless inlining of cold code (see the
previous commit) is.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 31 Mar 2012 17:58:08 +0000 (10:58 -0700)]
selinux: don't inline slow-path code into avc_has_perm_noaudit()
The selinux AVC paths remain some of the hottest (and deepest) codepaths
at filename lookup time, and we make it worse by having the slow path
cases take up I$ and stack space even when they don't trigger. Gcc
tends to always want to inline functions that are just called once -
never mind that this might make for slower and worse code in the caller.
So this tries to improve on it a bit by making the slow-path cases
explicitly separate functions that are marked noinline, causing gcc to
at least no longer allocate stack space for them unless they are
actually called. It also seems to help register allocation a tiny bit,
since gcc now doesn't take the slow case code into account.
Uninlining the slow path may also allow us to inline the remaining hot
path into the one caller that actually matters: avc_has_perm_flags().
I'll have to look at that separately, but both avc_audit() and
avc_has_perm_noaudit() are now small and lean enough that inlining them
may make sense.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Srivatsa S. Bhat [Fri, 30 Mar 2012 14:10:28 +0000 (19:40 +0530)]
sched: Fix incorrect usage of for_each_cpu_mask() in select_fallback_rq()
The function for_each_cpu_mask() expects a *pointer* to struct
cpumask as its second argument, whereas select_fallback_rq()
passes the value itself.
And moreover, for_each_cpu_mask() has been marked as obselete
in include/linux/cpumask.h. So move to the more appropriate
for_each_cpu() variant.
Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Dave Jones <davej@redhat.com>
Cc: Liu Chuansheng <chuansheng.liu@intel.com>
Cc: vapier@gentoo.org
Cc: rusty@rustcorp.com.au
Link: http://lkml.kernel.org/r/4F75BED4.9050005@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Sat, 31 Mar 2012 07:27:41 +0000 (09:27 +0200)]
Merge branch 'perf/urgent' of git://git./linux/kernel/git/acme/linux into perf/urgent
Amit Shah [Thu, 29 Mar 2012 07:28:05 +0000 (12:58 +0530)]
virtio-pci: switch to PM ops macro to initialise PM functions
Use the SET_SYSTEM_SLEEP_PM_OPS macro to initialise the suspend/resume
functions in the new PM API.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Amit Shah [Thu, 29 Mar 2012 07:21:41 +0000 (12:51 +0530)]
virtio-pci: S3 support
There's no difference in supporting S3 and S4 for virtio devices: the
vqs have to be re-created as the device has to be assumed to be reset at
restore-time. Since S4 already handles this situation, we can directly
use the same code and callbacks for S3 support.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Amit Shah [Thu, 29 Mar 2012 07:24:43 +0000 (12:54 +0530)]
virtio-pci: drop restore_common()
restore_common() was shared between restore and thaw callbacks. With
thaw gone, we don't need restore_common() anymore.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Amit Shah [Thu, 29 Mar 2012 07:20:20 +0000 (12:50 +0530)]
virtio: drop thaw PM operation
The thaw operation was used by the balloon driver, but after the last
commit there's no reason to have separate thaw and restore callbacks.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Amit Shah [Thu, 29 Mar 2012 07:18:19 +0000 (12:48 +0530)]
virtio: balloon: Allow stats update after restore from S4
There's no reason stats update after restore can't work. If a host
requested for stats, and before servicing the request, the guest entered
S4, upon restore, the stats request can still be processed and sent off
to the host.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Linus Torvalds [Sat, 31 Mar 2012 01:40:33 +0000 (18:40 -0700)]
Merge git://git./linux/kernel/git/davem/sparc
Pull Sam Ravnborg's sparc32 build fixes from David Miller.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc32: fix fallout from system.h removal
Sam Ravnborg [Fri, 30 Mar 2012 13:53:50 +0000 (15:53 +0200)]
sparc32: fix fallout from system.h removal
Build failures for the typical configs I use
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 31 Mar 2012 01:15:43 +0000 (18:15 -0700)]
Merge branch 'kbuild' of git://git./linux/kernel/git/mmarek/kbuild
Pull kbuild changes from Michal Marek:
- Unification of cmd_uimage among archs that use it
- make headers_check tries harder before reporting a missing
<linux/types.h> include
- kbuild portability fix for shells that do not support echo -e
- make clean descends into samples/
- setlocalversion grep fix
- modpost typo fix
- dtc warnings fix
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
setlocalversion: Use "grep -q" instead of piping output to "read dummy"
modpost: fix ALL_INIT_DATA_SECTIONS
Kbuild: centralize MKIMAGE and cmd_uimage definitions
headers_check: recursively search for linux/types.h inclusion
scripts/Kbuild.include: Fix portability problem of "echo -e"
scripts: dtc: fix compile warnings
kbuild: clean up samples directory
kbuild: disable -Wmissing-field-initializers for W=1
Linus Torvalds [Sat, 31 Mar 2012 01:14:05 +0000 (18:14 -0700)]
Merge branch 'misc' of git://git./linux/kernel/git/mmarek/kbuild
Pull non-critical part of kbuild from Michal Marek:
- New semantic patches, make coccicheck M= fix
- make gtags speedup
- make tags/TAGS always removes struct forward declarations
- make deb-pkg fixes (some patches are still pending, I know)
- scripts/patch-kernel fix from the last user of this script ;)
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
scripts/patch-kernel: digest kernel.org hosted .xz patches
scripts/coccinelle/api/ptr_ret.cocci: semantic patch for ptr_err
scripts: refactor remove structure forward declarations
kbuild: incremental tags update for GNU Global
coccinelle: semantic patch for bool issues
coccinelle: semantic patch to check for PTR_ERR after reassignment
coccinelle: semantic patch converting 0 test to null test
coccinelle: semantic patch for missing iounmap
coccinelle: semantic patch for missing clk_put
kbuild: Fix out-of-tree build for 'make deb-pkg'
kbuild: Only build linux-image package for UML
kbuild: Fix link to headers in 'make deb-pkg'
coccicheck: change handling of C={1,2} when M= is set
Linus Torvalds [Sat, 31 Mar 2012 01:13:17 +0000 (18:13 -0700)]
Merge branch 'kconfig' of git://git./linux/kernel/git/mmarek/kbuild
Pull kconfig bits from Michal Marek:
"There is one fix for make oldconfig by Arnaud and updates to the
merge_config.sh tool."
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
merge_config.sh: Add option to display redundant configs
merge_config.sh: Set execute bit
merge_config.sh: Use the first file as the initial config
kconfig: fix new choices being skipped upon config update
Linus Torvalds [Sat, 31 Mar 2012 01:08:05 +0000 (18:08 -0700)]
Merge branch 'irq-core-for-linus' of git://git./linux/kernel/git/tip/tip
Pull genirq updates from Thomas Gleixner.
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value
genirq: Respect NUMA node affinity in setup_irq_irq affinity()
genirq: Get rid of unneeded force parameter in irq_finalize_oneshot()
genirq: Minor readablity improvement in irq_wake_thread()
Linus Torvalds [Sat, 31 Mar 2012 01:07:13 +0000 (18:07 -0700)]
Merge branch 'core-locking-for-linus' of git://git./linux/kernel/git/tip/tip
Pull core locking updates from Thomas Gleixner.
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Mark get_robust_list as deprecated
futex: Do not leak robust list to unprivileged process
Linus Torvalds [Sat, 31 Mar 2012 00:31:56 +0000 (17:31 -0700)]
Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6
Pull MTD changes from David Woodhouse:
- Artem's cleanup of the MTD API continues apace.
- Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst
others.
- More work on DiskOnChip G3, new driver for DiskOnChip G4.
- Clean up debug/warning printks in JFFS2 to use pr_<level>.
Fix up various trivial conflicts, largely due to changes in calling
conventions for things like dmaengine_prep_slave_sg() (new inline
wrapper to hide new parameter, clashing with rewrite of previously last
parameter that used to be an 'append' flag, and is now a bitmap of
'unsigned long flags').
(Also some header file fallout - like so many merges this merge window -
and silly conflicts with sparse fixes)
* tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits)
mtd: docg3 add protection against concurrency
mtd: docg3 refactor cascade floors structure
mtd: docg3 increase write/erase timeout
mtd: docg3 fix inbound calculations
mtd: nand: gpmi: fix function annotations
mtd: phram: fix section mismatch for phram_setup
mtd: unify initialization of erase_info->fail_addr
mtd: support ONFI multi lun NAND
mtd: sm_ftl: fix typo in major number.
mtd: add device-tree support to spear_smi
mtd: spear_smi: Remove default partition information from driver
mtd: Add device-tree support to fsmc_nand
mtd: fix section mismatch for doc_probe_device
mtd: nand/fsmc: Remove sparse warnings and errors
mtd: nand/fsmc: Add DMA support
mtd: nand/fsmc: Access the NAND device word by word whenever possible
mtd: nand/fsmc: Use dev_err to report error scenario
mtd: nand/fsmc: Use devm routines
mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform
mtd: fsmc_nand: add pm callbacks to support hibernation
...
Linus Torvalds [Sat, 31 Mar 2012 00:00:34 +0000 (17:00 -0700)]
Merge tag 'fixes-for-linus' of git://git./linux/kernel/git/arm/arm-soc
Pull a few more ARM platform fixes from Olof Johansson:
"Apologies for back-to-back fixes pull requests, but one of the patches
below are the kind we'll see posted over and over if we don't send it
in. I hadn't done the full sanity-check of defconfig builds by the
time I sent up the other fixes yesterday or I would have included it
then.
Two patches, one dealing with the system.h fallout, the other is a
missing linux/bug.h in a place where ARRAY_SIZE() is used."
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: clps711x: fix missing include file
ARM: fix builds due to missing <asm/system_misc.h> includes
Linus Torvalds [Fri, 30 Mar 2012 23:45:38 +0000 (16:45 -0700)]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux
Pull ACPI & Power Management changes from Len Brown:
- ACPI 5.0 after-ripples, ACPICA/Linux divergence cleanup
- cpuidle evolving, more ARM use
- thermal sub-system evolving, ditto
- assorted other PM bits
Fix up conflicts in various cpuidle implementations due to ARM cpuidle
cleanups (ARM at91 self-refresh and cpu idle code rewritten into
"standby" in asm conflicting with the consolidation of cpuidle time
keeping), trivial SH include file context conflict and RCU tracing fixes
in generic code.
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (77 commits)
ACPI throttling: fix endian bug in acpi_read_throttling_status()
Disable MCP limit exceeded messages from Intel IPS driver
ACPI video: Don't start video device until its associated input device has been allocated
ACPI video: Harden video bus adding.
ACPI: Add support for exposing BGRT data
ACPI: export acpi_kobj
ACPI: Fix logic for removing mappings in 'acpi_unmap'
CPER failed to handle generic error records with multiple sections
ACPI: Clean redundant codes in scan.c
ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()
ACPI: consistently use should_use_kmap()
PNPACPI: Fix device ref leaking in acpi_pnp_match
ACPI: Fix use-after-free in acpi_map_lsapic
ACPI: processor_driver: add missing kfree
ACPI, APEI: Fix incorrect APEI register bit width check and usage
Update documentation for parameter *notrigger* in einj.txt
ACPI, APEI, EINJ, new parameter to control trigger action
ACPI, APEI, EINJ, limit the range of einj_param
ACPI, APEI, Fix ERST header length check
cpuidle: power_usage should be declared signed integer
...
Linus Torvalds [Fri, 30 Mar 2012 23:24:38 +0000 (16:24 -0700)]
Merge git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French.
* git://git.samba.org/sfrench/cifs-2.6:
[CIFS] Update CIFS version number to 1.77
CIFS: Add missed forcemand mount option
[CIFS] Fix trivial sparse warning with asyn i/o patch
cifs: handle "sloppy" option appropriately
cifs: use standard token parser for mount options
cifs: remove /proc/fs/cifs/OplockEnabled
cifs: convert cifs_iovec_write to use async writes
cifs: call cifs_update_eof with i_lock held
cifs: abstract out function to marshal up the iovec array for async writes
cifs: fix up get_numpages
cifs: make cifsFileInfo_get return the cifsFileInfo pointer
cifs: fix allocation in cifs_write_allocate_pages
cifs: allow caller to specify completion op when allocating writedata
cifs: add pid field to cifs_writedata
cifs: add new cifsiod_wq workqueue
CIFS: Change mid_q_entry structure fields
CIFS: Expand CurrentMid field
CIFS: Separate protocol-specific code from cifs_readv_receive code
CIFS: Separate protocol-specific code from demultiplex code
CIFS: Separate protocol-specific code from transport routines
Linus Torvalds [Fri, 30 Mar 2012 23:09:02 +0000 (16:09 -0700)]
Merge tag 'for-v3.4-rc1' of git://git.infradead.org/battery-2.6
Pull battery updates from Anton Vorontsov:
"Various small bugfixes and enhancements, plus two new drivers:
- A quite complex ab8500 charger driver, submitted by Arun Murthy @
ST-Ericsson;
- Summit Microelectronics SMB347 Battery Charger, submitted by Bruce
E Robertson and Alan Cox @ Intel.
And that's all."
* tag 'for-v3.4-rc1' of git://git.infradead.org/battery-2.6: (36 commits)
max17042_battery: Clean up interrupt handling
Revert "max8998_charger: Include linux/module.h just once"
ab8500_fg: Fix some build warnings on x86_64
max17042_battery: Fix CHARGE_FULL representation.
max8998_charger: Include linux/module.h just once
power_supply: Convert i2c drivers to module_i2c_driver
lp8727_charger: Add MODULE_DEVICE_TABLE
charger-manager: Simplify charger_get_property(), get rid of a warning
charger-manager: Clean up for better readability
da9052-battery: Convert to use module_platform_driver
da9052-battery: Fix a memory leak when unload the module
da9052-battery: Add missing platform_set_drvdata
ab8500: Turn unneeded global symbols into local ones
ab8500_fg: Fix copy-paste error
ab8500_fg: Get rid of 'struct battery_type'
ab8500_fg: Get rid of 'struct v_to_cap'
ab8500_btemp: Get rid of 'enum adc_therm'
ab8500_charger: Convert to the new USB OTG calls
ab8500-btemp: AB8500 battery temperature driver
ab8500-fg: A8500 fuel gauge driver
...
Linus Torvalds [Fri, 30 Mar 2012 23:03:55 +0000 (16:03 -0700)]
Merge branch 'dunlap' (Randy's Documentation patches)
Merge Documentation fixes from Randy Dunlap.
Fixed up several small annoyances (bad changelogs and corrupted utf8
names), I need to try to convince people to do things right.
* emailed from Randy Dunlap <rdunlap@xenotime.net>:
Documentation: fix typo in ABI/stable/sysfs-driver-usb-usbtmc
Documentation: replace install commands with softdeps
Documentation: remove references to /etc/modprobe.conf
Documentation: input.txt: clarify mousedev 'cat' command syntax
Documentation: CodingStyle: add inline assembly guidelines
Documentation: sysrq: Crutcher Dunnavant is unavailable
Documentation: mention scripts/diffconfig tool
Documentation: remove 'mach' from dontdiff file
Rafal Kapela [Fri, 30 Mar 2012 20:37:26 +0000 (13:37 -0700)]
Documentation: fix typo in ABI/stable/sysfs-driver-usb-usbtmc
Fix "the the" in ABI/stable/sysfs-driver-usb-usbtmc
Signed-off-by: Rafal Kapela <raf.kapela@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Lucas De Marchi [Fri, 30 Mar 2012 20:37:20 +0000 (13:37 -0700)]
Documentation: replace install commands with softdeps
Install commands should not be used to specify soft dependencies among
modules. When loading modules it's much better to have a softdep that
modprobe knows what's being done than having to fork/exec another
instance of modprobe to load the other module.
By using a softdep user has also an option to remove the dependencies
when removing the module (and if its refcount dropped to 0)
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Lucas De Marchi [Fri, 30 Mar 2012 20:37:16 +0000 (13:37 -0700)]
Documentation: remove references to /etc/modprobe.conf
Usage of /etc/modprobe.conf file was deprecated by module-init-tools and
is no longer parsed by new kmod tool. References to this file are
replaced in Documentation, comments and Kconfig according to the
context.
There are also some references to the old /etc/modules.conf from 2.4
kernels that are being removed.
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Randy Dunlap [Fri, 30 Mar 2012 20:37:13 +0000 (13:37 -0700)]
Documentation: input.txt: clarify mousedev 'cat' command syntax
Clarify that the 'cat' command does not include the (c, 13, 32)
after it.
Reported-by: Dan Jidanni Jacobson <jidanni@jidanni.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Josh Triplett [Fri, 30 Mar 2012 20:37:10 +0000 (13:37 -0700)]
Documentation: CodingStyle: add inline assembly guidelines
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Randy Dunlap [Fri, 30 Mar 2012 20:37:06 +0000 (13:37 -0700)]
Documentation: sysrq: Crutcher Dunnavant is unavailable
Reported-by: Křištof Želechovski <giecrilj@stegny.2a.pl>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Javi Merino [Fri, 30 Mar 2012 20:37:02 +0000 (13:37 -0700)]
Documentation: mention scripts/diffconfig tool
The kconfig documentation suggests using plain 'diff' to compare config
files and then adds "Yes, we need something better here". Commit
a717417e7f96 ("kconfig: add diffconfig utility") added what that comment
was looking for.
Signed-off-by: Javi Merino <javi.merino@arm.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
H Hartley Sweeten [Fri, 30 Mar 2012 20:36:58 +0000 (13:36 -0700)]
Documentation: remove 'mach' from dontdiff file
The mach entry in the dontdiff file causes all the
arch/arm/mach-*/include/mach directories to be skipped.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Olof Johansson [Fri, 30 Mar 2012 06:34:29 +0000 (23:34 -0700)]
ARM: clps711x: fix missing include file
linux/bug.h is needed due to an ARRAY_SIZE being used:
arch/arm/mach-clps711x/
edb7211-mm.c: In function 'edb7211_map_io':
arch/arm/mach-clps711x/
edb7211-mm.c:79:9: error: implicit declaration of function 'BUILD_BUG_ON_ZERO'
Signed-off-by: Olof Johansson <olof@lixom.net>
Olof Johansson [Fri, 30 Mar 2012 06:22:44 +0000 (23:22 -0700)]
ARM: fix builds due to missing <asm/system_misc.h> includes
This does a sweeping change fixing up all the missing system_misc.h and
system_info.h includes from the system.h split-up change. These were the
ones I came across when building all defconfigs in arch/arm/configs, there
might be more but they lack adequate build coverage to be easily caught.
I'm expecting to get a lot of these piecemeal by each maintainer, so we
might just as well do one sweeping change to get them all at once.
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Krzysztof Halasa <khc@pm.waw.pl>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Jiang Liu [Fri, 30 Mar 2012 15:11:33 +0000 (23:11 +0800)]
genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value
irq_move_masked_irq() checks the return code of
chip->irq_set_affinity() only for 0, but IRQ_SET_MASK_OK_NOCOPY is
also a valid return code, which is there to avoid a redundant copy of
the cpumask. But in case of IRQ_SET_MASK_OK_NOCOPY we not only avoid
the redundant copy, we also fail to adjust the thread affinity of an
eventually threaded interrupt handler.
Handle IRQ_SET_MASK_OK (==0) and IRQ_SET_MASK_OK_NOCOPY(==1) return
values correctly by checking the valid return values seperately.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Cc: Keping Chen <chenkeping@huawei.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1333120296-13563-2-git-send-email-jiang.liu@huawei.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Len Brown [Fri, 30 Mar 2012 20:35:53 +0000 (16:35 -0400)]
Merge branch 'tboot' into release
Conflicts:
drivers/acpi/acpica/hwsleep.c
Text conflict between:
2feec47d4c5f80b05f1650f5a24865718978eea4
(ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers)
which removed #include "actables.h"
and
09f98a825a821f7a3f1b162f9ed023f37213a63b
(x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling tboot_sleep.)
which removed #include <linux/tboot.h>
The resolution is to remove them both.
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Fri, 30 Mar 2012 20:21:26 +0000 (16:21 -0400)]
Merge branch 'd3' into release
Conflicts:
drivers/acpi/sleep.c
This was a text conflict between
a2ef5c4fd44ce3922435139393b89f2cce47f576
(ACPI: Move module parameter gts and bfs to sleep.c)
which added #include <linux/module.h>
and
b24e5098853653554baf6ec975b9e855f3d6e5c0
(ACPI, PCI: Move acpi_dev_run_wake() to ACPI core)
which added #include <linux/pm_runtime.h>
The resolution was to take them both.
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Fri, 30 Mar 2012 20:12:23 +0000 (16:12 -0400)]
Merge branch 'apei' into release
Conflicts:
drivers/acpi/apei/apei-base.c
This was a conflict between
15afae604651d4e17652d2ffb56f5e36f991cfef
(CPI, APEI: Fix incorrect APEI register bit width check and usage)
and
653f4b538f66d37db560e0f56af08117136d29b7
(ACPICA: Expand OSL memory read/write interfaces to 64 bits)
The former changed a parameter in the call to acpi_os_read_memory64()
and the later replaced all calls to acpi_os_read_memory64()
with calls to acpi_os_read_memory().
Signed-off-by: Len Brown <len.brown@intel.com>
Len Brown [Fri, 30 Mar 2012 20:10:37 +0000 (16:10 -0400)]
Merge branches 'acpica', 'bgrt', 'bz-11533', 'cpuidle', 'ec', 'hotplug', 'misc', 'red-hat-bz-727865', 'thermal', 'throttling', 'turbostat' and 'video' into release
Signed-off-by: Len Brown <len.brown@intel.com>
Dan Carpenter [Wed, 7 Mar 2012 11:57:36 +0000 (14:57 +0300)]
ACPI throttling: fix endian bug in acpi_read_throttling_status()
Using a u64 here creates an endian bug. We store a u32 number in the
top byte which is a larger number than intended on big endian systems.
There is no reason to use a 64 bit data type here, I guess it was just
an oversight.
I removed the initialization to zero as well. It's needed with a u64
but with a u32, the variable gets initialized properly inside the call
to acpi_os_read_port().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Andi Kleen [Mon, 6 Feb 2012 16:17:12 +0000 (08:17 -0800)]
Disable MCP limit exceeded messages from Intel IPS driver
On a system on the thermal limit these are quite noisy and flood the logs.
Better would be a counter anyways. But given that we don't even have
anything for normal throttling this doesn't seem to be urgent either.
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Igor Murzov [Fri, 30 Mar 2012 17:32:09 +0000 (21:32 +0400)]
ACPI video: Don't start video device until its associated input device has been allocated
Quoth Dmitry Torokhov:
In addition to bus notifier we do install device notifier explicitly
so it might fire up early. The easiest fox would be to move
acpi_video_bus_start_devices() after input_allocate_device() but
before input_register_device() - unregistered input devices can handle
input_event() calls just fine.
May fix crashes reported in:
https://bugzilla.kernel.org/show_bug.cgi?id=40672
Signed-off-by: Igor Murzov <e-mail@date.by>
Signed-off-by: Len Brown <len.brown@intel.com>
Linus Torvalds [Fri, 30 Mar 2012 19:44:29 +0000 (12:44 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes and features from Chris Mason:
"We've merged in the error handling patches from SuSE. These are
already shipping in the sles kernel, and they give btrfs the ability
to abort transactions and go readonly on errors. It involves a lot of
churn as they clarify BUG_ONs, and remove the ones we now properly
deal with.
Josef reworked the way our metadata interacts with the page cache.
page->private now points to the btrfs extent_buffer object, which
makes everything faster. He changed it so we write an whole extent
buffer at a time instead of allowing individual pages to go down,,
which will be important for the raid5/6 code (for the 3.5 merge
window ;)
Josef also made us more aggressive about dropping pages for metadata
blocks that were freed due to COW. Overall, our metadata caching is
much faster now.
We've integrated my patch for metadata bigger than the page size.
This allows metadata blocks up to 64KB in size. In practice 16K and
32K seem to work best. For workloads with lots of metadata, this cuts
down the size of the extent allocation tree dramatically and fragments
much less.
Scrub was updated to support the larger block sizes, which ended up
being a fairly large change (thanks Stefan Behrens).
We also have an assortment of fixes and updates, especially to the
balancing code (Ilya Dryomov), the back ref walker (Jan Schmidt) and
the defragging code (Liu Bo)."
Fixed up trivial conflicts in fs/btrfs/scrub.c that were just due to
removal of the second argument to k[un]map_atomic() in commit
7ac687d9e047.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (75 commits)
Btrfs: update the checks for mixed block groups with big metadata blocks
Btrfs: update to the right index of defragment
Btrfs: do not bother to defrag an extent if it is a big real extent
Btrfs: add a check to decide if we should defrag the range
Btrfs: fix recursive defragment with autodefrag option
Btrfs: fix the mismatch of page->mapping
Btrfs: fix race between direct io and autodefrag
Btrfs: fix deadlock during allocating chunks
Btrfs: show useful info in space reservation tracepoint
Btrfs: don't use crc items bigger than 4KB
Btrfs: flush out and clean up any block device pages during mount
btrfs: disallow unequal data/metadata blocksize for mixed block groups
Btrfs: enhance superblock sanity checks
Btrfs: change scrub to support big blocks
Btrfs: minor cleanup in scrub
Btrfs: introduce common define for max number of mirrors
Btrfs: fix infinite loop in btrfs_shrink_device()
Btrfs: fix memory leak in resolver code
Btrfs: allow dup for data chunks in mixed mode
Btrfs: validate target profiles only if we are going to use them
...
Igor Murzov [Fri, 30 Mar 2012 17:32:08 +0000 (21:32 +0400)]
ACPI video: Harden video bus adding.
It is always better to check return values, so add some new checks and
correct existing ones.
v2: Be consistent and don't mix errors from -E* and AE_* namespaces.
Signed-off-by: Igor Murzov <e-mail@date.by>
Signed-off-by: Len Brown <len.brown@intel.com>
David Howells [Fri, 30 Mar 2012 18:43:11 +0000 (11:43 -0700)]
ia64: Fixup asm/cmpxchg.h
The empty asm/cmpxchg.h file that was provided as a temporary build fix
for the asm/system.h disintgration build problem should really include
<asm/intrinsics.h> to make definitions of xchg() and cmpxchg()
available.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 30 Mar 2012 17:59:52 +0000 (10:59 -0700)]
Merge tag 'sound-3.4' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes for 3.4-rc1, including
- mic-recording regression fix for Realtek codec
- clean-up of dmaengine parameter mess
- WM8894 calibration tweak
- minor fixes for asihpi and some bool module parms"
* tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: fix isa/opti9xx module param type
sound: fix oss/msnd_pinnacle module param type
ALSA: asihpi - fix return type of hpios_locked_mem_alloc()
ASoC: dmaengine_pcm: use dmaengine cyclic wrapper
ASoC: Add extra parameter to device_prep_dma_cyclic
ALSA: hda/realtek - Fix ADC assignment with a shared HP/Mic pin
ASoC: wm8994: Update WM8994 DCS calibration
Linus Torvalds [Fri, 30 Mar 2012 17:57:40 +0000 (10:57 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux
Pull s390 build fixes from Martin Schwidefsky.
More small fixes for the system.h disintegration.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
[S390] Fix build errors (fallout from system.h disintegration)
Linus Torvalds [Fri, 30 Mar 2012 17:56:11 +0000 (10:56 -0700)]
Merge git://git./linux/kernel/git/davem/sparc
Pull minor Sparc fixes from David Miller:
"This just fixes build fallout due to recent changes that went int your
tree."
Sam Ravnborg says that sparc32 still needs some more tender loving.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: Fix even more fallout from system.h split.
sparc: fix fallout from system.h split
Ingo Molnar [Thu, 29 Mar 2012 16:08:38 +0000 (13:08 -0300)]
perf tools: Remove auto-generated bison/flex files
These should not be in the Git history - they are auto-generated.
Extend the Makefile rules of the parser files to include the generation
run.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120327183335.GA27621@gmail.com
[ committer note: Fixed up O= handling ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>