KOSAKI Motohiro 549927620b memcg: add null check to page_cgroup_zoneinfo()
If CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y, page_cgroup::mem_cgroup can be NULL.
Therefore null checking is better.

A later patch uses this function.

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-08 08:31:07 -08:00
..
2008-12-29 11:27:46 +02:00
2009-01-08 08:31:06 -08:00
2009-01-06 15:59:14 -08:00
2009-01-06 15:59:08 -08:00
2009-01-08 08:31:06 -08:00
2008-11-14 11:29:12 +11:00
2007-10-20 01:27:18 +02:00
2009-01-08 08:31:04 -08:00
2008-04-28 08:58:18 -07:00
2009-01-06 15:59:10 -08:00
2008-07-28 16:30:21 -07:00
2009-01-05 17:44:42 -08:00
2009-01-05 11:54:28 -05:00
2009-01-05 11:54:28 -05:00
2009-01-08 08:31:07 -08:00
2009-01-08 08:31:05 -08:00
2008-06-12 18:05:41 -07:00
2009-01-01 10:12:29 +10:30
2007-10-20 01:27:18 +02:00
2009-01-08 08:31:06 -08:00
2009-01-01 10:12:29 +10:30
2008-11-30 10:03:35 -08:00
2009-01-08 08:31:05 -08:00
2009-01-08 08:31:07 -08:00
2009-01-08 08:31:06 -08:00
2009-01-01 10:12:29 +10:30