Commit d969fbe6 authored Apr 02, 2009 by Li Zefan Committed by Linus Torvalds Apr 02, 2009

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>

parent 0670e08b

kernel/cgroup_debug.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -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;
		}