memcg: charged pages always have valid per-memcg zone info
authorJohannes Weiner <hannes@cmpxchg.org>
Wed, 23 Mar 2011 23:42:31 +0000 (16:42 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 24 Mar 2011 02:46:28 +0000 (19:46 -0700)
commit4dc03de1b29901b61cb27e4cab44a7f578dc0fc9
tree4edca28cf1636015eacd8012023804e4f27b2e34
parent6b3ae58efca06623c197fd6d91ded4aa3a8fe039
memcg: charged pages always have valid per-memcg zone info

page_cgroup_zoneinfo() will never return NULL for a charged page, remove
the check for it in mem_cgroup_get_reclaim_stat_from_page().

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>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c