From: Johannes Weiner <hannes@cmpxchg.org>
Date: Wed, 10 Dec 2014 23:44:30 +0000 (-0800)
Subject: mm: memcontrol: pull the NULL check from __mem_cgroup_same_or_subtree()
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~139^2~119
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=413918bb61b4fa027baa3e79546c47f15e4b9ea8;p=pandora-kernel.git

mm: memcontrol: pull the NULL check from __mem_cgroup_same_or_subtree()

The NULL in mm_match_cgroup() comes from a possibly exiting mm->owner.  It
makes a lot more sense to check where it's looked up, rather than check
for it in __mem_cgroup_same_or_subtree() where it's unexpected.

No other callsite passes NULL to __mem_cgroup_same_or_subtree().

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>
---

Reading git-diff-tree failed