diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 752de1b..bf13ecb 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -764,6 +764,8 @@ static inline bool blkcg_bio_issue_check(struct request_queue *q,
 	struct blkcg_gq *blkg;
 	bool throtl = false;
 
+	rcu_read_lock();
+
 	if (!bio->bi_blkg) {
 		char b[BDEVNAME_SIZE];
 
@@ -791,6 +793,7 @@ static inline bool blkcg_bio_issue_check(struct request_queue *q,
 
 	blkcg_bio_issue_init(bio);
 
+	rcu_read_unlock();
 	return !throtl;
 }