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-rw-r--r--mm/memcontrol.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9b4993e..457d671 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -231,6 +231,9 @@ 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);
}
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