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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2009-01-07 18:08:18 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-08 08:31:07 -0800 |
| commit | 549927620b04a8f8073ce2ee2a8977f209af2ee5 (patch) | |
| tree | 6451507892fb353732fe959b2bf0a171fa3ac20b /mm/vmscan.c | |
| parent | eeee9a8cd1e93c8b94e7788790fa9e2f8910c779 (diff) | |
| download | lwn-549927620b04a8f8073ce2ee2a8977f209af2ee5.tar.gz lwn-549927620b04a8f8073ce2ee2a8977f209af2ee5.zip | |
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>
Diffstat (limited to 'mm/vmscan.c')
0 files changed, 0 insertions, 0 deletions