From 4dc03de1b29901b61cb27e4cab44a7f578dc0fc9 Mon Sep 17 00:00:00 2001 From: Johannes Weiner <hannes@cmpxchg.org> Date: Wed, 23 Mar 2011 16:42:31 -0700 Subject: [PATCH] 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 | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 660dfc27d971..b35a28d80ab5 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1043,9 +1043,6 @@ mem_cgroup_get_reclaim_stat_from_page(struct page *page) /* Ensure pc->mem_cgroup is visible after reading PCG_USED. */ smp_rmb(); mz = page_cgroup_zoneinfo(pc->mem_cgroup, page); - if (!mz) - return NULL; - return &mz->reclaim_stat; } -- GitLab