kernel/block/blk-sysfs.c
.. .. @@ -726,6 +726,8 @@ 726 726 { 727 727 struct request_queue *q = container_of(rcu_head, struct request_queue, 728 728 rcu_head); 729 +730 + percpu_ref_exit(&q->q_usage_counter);729 731 kmem_cache_free(blk_requestq_cachep, q); 730 732 } 731 733