blk-mq: remove unused function blk_mq_queue_stopped()

blk_mq_queue_stopped() doesn't have any caller, which was found by
code coverage test, thus remove it.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20220818063555.3741222-1-yukuai1@huaweicloud.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-mq.c

@@ -2229,26 +2229,6 @@ void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs)
 }
 EXPORT_SYMBOL(blk_mq_delay_run_hw_queues);
 
-/**
- * blk_mq_queue_stopped() - check whether one or more hctxs have been stopped
- * @q: request queue.
- *
- * The caller is responsible for serializing this function against
- * blk_mq_{start,stop}_hw_queue().
- */
-bool blk_mq_queue_stopped(struct request_queue *q)
-{
-	struct blk_mq_hw_ctx *hctx;
-	unsigned long i;
-
-	queue_for_each_hw_ctx(q, hctx, i)
-		if (blk_mq_hctx_stopped(hctx))
-			return true;
-
-	return false;
-}
-EXPORT_SYMBOL(blk_mq_queue_stopped);
-
 /*
  * This function is often used for pausing .queue_rq() by driver when
  * there isn't enough resource or some conditions aren't satisfied, and

include/linux/blk-mq.h

@@ -857,7 +857,6 @@ void blk_mq_kick_requeue_list(struct request_queue *q);
 void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
 void blk_mq_complete_request(struct request *rq);
 bool blk_mq_complete_request_remote(struct request *rq);
-bool blk_mq_queue_stopped(struct request_queue *q);
 void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);
 void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx);
 void blk_mq_stop_hw_queues(struct request_queue *q);