1 files changed, 1 insertions, 3 deletions

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 8e5863e900bf..b6802c46d68f 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -209,9 +209,7 @@ static inline struct blkcg *bio_blkcg(struct bio *bio)
  */
 static inline struct blkcg *blkcg_parent(struct blkcg *blkcg)
 {
-        struct cgroup *pcg = blkcg->css.cgroup->parent;
-
-        return pcg ? cgroup_to_blkcg(pcg) : NULL;
+        return css_to_blkcg(css_parent(&blkcg->css));
 }
 
 /**