wbt_rq_qos
if (!wbt_rq_qos(q)) {
struct rq_qos *rqos = wbt_rq_qos(q);
struct rq_qos *rqos = wbt_rq_qos(q);
struct rq_qos *rqos = wbt_rq_qos(q);
rqos = wbt_rq_qos(q);
struct rq_qos *rqos = wbt_rq_qos(disk->queue);
struct rq_qos *rqos = wbt_rq_qos(q);