block: remove unneeded argument from blk_alloc_flush_queue

Remove 'q' from arguments since it is not used anymore after
commit 7e992f847a08e ("block: remove non mq parts from the
flush code").

Signed-off-by: Guoqing Jiang <[e-mail]>
Reviewed-by: Nikolay Borisov <[e-mail]>
Reviewed-by: Bart Van Assche <[e-mail]>
Reviewed-by: Chaitanya Kulkarni <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

block/blk-flush.c

···
 }
 EXPORT_SYMBOL(blkdev_issue_flush);
 
-struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
-		int node, int cmd_size, gfp_t flags)
+struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
+					      gfp_t flags)
 {
 	struct blk_flush_queue *fq;
 	int rq_sz = sizeof(struct request);

block/blk-mq.c

···
 	init_waitqueue_func_entry(&hctx->dispatch_wait, blk_mq_dispatch_wake);
 	INIT_LIST_HEAD(&hctx->dispatch_wait.entry);
 
-	hctx->fq = blk_alloc_flush_queue(q, hctx->numa_node, set->cmd_size,
-			gfp);
+	hctx->fq = blk_alloc_flush_queue(hctx->numa_node, set->cmd_size, gfp);
 	if (!hctx->fq)
 		goto free_bitmap;
 

block/blk.h

···
 	return hctx->fq->flush_rq == req;
 }
 
-struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
-		int node, int cmd_size, gfp_t flags);
+struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,
+					      gfp_t flags);
 void blk_free_flush_queue(struct blk_flush_queue *q);
 
 void blk_freeze_queue(struct request_queue *q);