memcg: convert to use cgroup_is_descendant()

This is a preparation to kill css_id. Signed-off-by: Li Zefan <lizefan@huawei.com> Acked-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Tejun Heo <tj@kernel.org>
git-mirror · Sep 24, 2013 · b47f77b · b47f77b
1 parent 272b98c
commit b47f77b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
@@ -1318,7 +1318,7 @@ bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
 		return true;
 	if (!root_memcg->use_hierarchy || !memcg)
 		return false;
-	return css_is_ancestor(&memcg->css, &root_memcg->css);
+	return cgroup_is_descendant(memcg->css.cgroup, root_memcg->css.cgroup);
 }
 
 static bool mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,