[patch 1/5] memcg: no uncharged pages reach page_cgroup_zoneinfo

[Johannes Weiner]

All callsites check PCG_USED before passing pc->mem_cgroup, so the
latter is never NULL.

Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
---
 mm/memcontrol.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e071d7e..85b4b5a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -370,9 +370,6 @@ page_cgroup_zoneinfo(struct page_cgroup *pc)
 	int nid = page_cgroup_nid(pc);
 	int zid = page_cgroup_zid(pc);
 
-	if (!mem)
-		return NULL;
-
 	return mem_cgroup_zoneinfo(mem, nid, zid);
 }
 
-- 
1.7.4

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