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authorJohannes Weiner <hannes@cmpxchg.org>2011-03-24 02:42:23 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-24 05:46:24 +0300
commitc14f35c70e068392ccae0b2d6f755baea5eed4d6 (patch)
tree1e3265ba63a859ee0b45ae89303afea4de19012c /mm
parent3403968d7a7dc373901cad0cad56b3afcb09cc50 (diff)
downloadlinux-c14f35c70e068392ccae0b2d6f755baea5eed4d6.tar.xz
memcg: remove impossible conditional when committing
No callsite ever passes a NULL pointer for a struct mem_cgroup * to the committing function. There is no need to check for it. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0595e2b184a2..b94cd24c5baa 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2118,10 +2118,6 @@ static void __mem_cgroup_commit_charge(struct mem_cgroup *mem,
{
int nr_pages = page_size >> PAGE_SHIFT;
- /* try_charge() can return NULL to *memcg, taking care of it. */
- if (!mem)
- return;
-
lock_page_cgroup(pc);
if (unlikely(PageCgroupUsed(pc))) {
unlock_page_cgroup(pc);