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>
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@ -1318,7 +1318,7 @@ bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
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return true;
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return true;
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if (!root_memcg->use_hierarchy || !memcg)
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if (!root_memcg->use_hierarchy || !memcg)
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return false;
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return false;
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return css_is_ancestor(&memcg->css, &root_memcg->css);
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return cgroup_is_descendant(memcg->css.cgroup, root_memcg->css.cgroup);
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}
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}
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static bool mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
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static bool mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
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