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| author | Tomasz Buchert <tomasz.buchert@inria.fr> | 2010-10-27 15:33:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:03:08 -0700 |
| commit | d5de4ddb1bc430289bede76c0d87cabee93f749a (patch) | |
| tree | 142ebbc437d2d6e5c47eda6c37847eb058d2851e /kernel | |
| parent | abffc0207f12563f17bbde96e4cc0d9f3d7e2a53 (diff) | |
| download | lwn-d5de4ddb1bc430289bede76c0d87cabee93f749a.tar.gz lwn-d5de4ddb1bc430289bede76c0d87cabee93f749a.zip | |
cgroup_freezer: unnecessary test in cgroup_freezing_or_frozen()
The root freezer_state is always CGROUP_THAWED so we can remove the
special case from the code. The test itself can be handy and is extracted
to static function.
Signed-off-by: Tomasz Buchert <tomasz.buchert@inria.fr>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cgroup_freezer.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c index ce71ed53e88f..321e2a007d25 100644 --- a/kernel/cgroup_freezer.c +++ b/kernel/cgroup_freezer.c @@ -48,20 +48,19 @@ static inline struct freezer *task_freezer(struct task_struct *task) struct freezer, css); } -int cgroup_freezing_or_frozen(struct task_struct *task) +static inline int __cgroup_freezing_or_frozen(struct task_struct *task) { - struct freezer *freezer; - enum freezer_state state; + enum freezer_state state = task_freezer(task)->state; + return (state == CGROUP_FREEZING) || (state == CGROUP_FROZEN); +} +int cgroup_freezing_or_frozen(struct task_struct *task) +{ + int result; task_lock(task); - freezer = task_freezer(task); - if (!freezer->css.cgroup->parent) - state = CGROUP_THAWED; /* root cgroup can't be frozen */ - else - state = freezer->state; + result = __cgroup_freezing_or_frozen(task); task_unlock(task); - - return (state == CGROUP_FREEZING) || (state == CGROUP_FROZEN); + return result; } /* |