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authorLi Zefan <lizf@cn.fujitsu.com>2009-04-02 16:57:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-02 19:04:54 -0700
commitd969fbe69e07fcceb0558b35d4c75eb046041c5e (patch)
treee93bab346a32b061522a946fe3a012155c59c27c
parent0670e08bdfc67272f8c3087030417465629b8073 (diff)
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>
-rw-r--r--kernel/cgroup_debug.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/cgroup_debug.c b/kernel/cgroup_debug.c
index daca6209202..0c92d797baa 100644
--- a/kernel/cgroup_debug.c
+++ b/kernel/cgroup_debug.c
@@ -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;
}