diff options
Diffstat (limited to 'block/blk-rq-qos.c')
| -rw-r--r-- | block/blk-rq-qos.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c index 95982bc46ba1..848591fb3c57 100644 --- a/block/blk-rq-qos.c +++ b/block/blk-rq-qos.c @@ -2,6 +2,8 @@ #include "blk-rq-qos.h" +__read_mostly DEFINE_STATIC_KEY_FALSE(block_rq_qos); + /* * Increment 'v', if 'v' is below 'below'. Returns true if we succeeded, * false if 'v' + 1 would be bigger than 'below'. @@ -317,6 +319,7 @@ void rq_qos_exit(struct request_queue *q) struct rq_qos *rqos = q->rq_qos; q->rq_qos = rqos->next; rqos->ops->exit(rqos); + static_branch_dec(&block_rq_qos); } mutex_unlock(&q->rq_qos_mutex); } @@ -343,6 +346,7 @@ int rq_qos_add(struct rq_qos *rqos, struct gendisk *disk, enum rq_qos_id id, goto ebusy; rqos->next = q->rq_qos; q->rq_qos = rqos; + static_branch_inc(&block_rq_qos); blk_mq_unfreeze_queue(q, memflags); |