void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic);
void blk_queue_start_drain(struct request_queue *q);
int __bio_queue_enter(struct request_queue *q, struct bio *bio);
-bool submit_bio_checks(struct bio *bio);
static inline bool blk_try_enter_queue(struct request_queue *q, bool pm)
{