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debug cgroup: remove unneeded cgroup_lock 

Since we are in cgroup write handler, so the cgrp is valid, so we don't
have to hold cgroup_mutex when calling cgroup_task_count().  One similar
example is in cgroup_tasks_open().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Li Zefan 2009-04-02 16:57:31 -07:00 committed by Linus Torvalds
parent 0670e08bdf
commit d969fbe69e
1 changed files with 0 additions and 2 deletions
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kernel/cgroup_debug.c
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@ -40,9 +40,7 @@ static u64 taskcount_read(struct cgroup *cont, struct cftype *cft)
{
u64 count;
cgroup_lock();
count = cgroup_task_count(cont);
cgroup_unlock();
return count;
}