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Subject[PATCH v2 4/8] memcg: convert to use cgroup_is_descendant()
This is a preparation to kill css_id.

Signed-off-by: Li Zefan <lizefan@huawei.com>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index d12ca6f..626c426 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1434,7 +1434,7 @@ 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,
--
1.8.0.2


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