tree 5dffdf758736c83b6bfe8b6ada0dbb99d992c0f5
parent 413918bb61b4fa027baa3e79546c47f15e4b9ea8
author Johannes Weiner <hannes@cmpxchg.org> 1418255073 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1418262068 -0800

mm: memcontrol: drop bogus RCU locking from mem_cgroup_same_or_subtree()

None of the mem_cgroup_same_or_subtree() callers actually require it to
take the RCU lock, either because they hold it themselves or they have css
references.  Remove it.

To make the API change clear, rename the leftover helper to
mem_cgroup_is_descendant() to match cgroup_is_descendant().

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>