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-rw-r--r--mm/memcontrol.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ac35bccadb7b..f8517cd28feb 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1148,7 +1148,7 @@ bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
1148{ 1148{
1149 if (root_memcg == memcg) 1149 if (root_memcg == memcg)
1150 return true; 1150 return true;
1151 if (!root_memcg->use_hierarchy) 1151 if (!root_memcg->use_hierarchy || !memcg)
1152 return false; 1152 return false;
1153 return css_is_ancestor(&memcg->css, &root_memcg->css); 1153 return css_is_ancestor(&memcg->css, &root_memcg->css);
1154} 1154}