block: remove req->timeout_list

Unused now that the legacy request path is gone.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-core.c

@@ -144,7 +144,6 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
 	memset(rq, 0, sizeof(*rq));
 
 	INIT_LIST_HEAD(&rq->queuelist);
-	INIT_LIST_HEAD(&rq->timeout_list);
 	rq->q = q;
 	rq->__sector = (sector_t) -1;
 	INIT_HLIST_NODE(&rq->hash);

block/blk-mq.c

@@ -327,7 +327,6 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
 	rq->extra_len = 0;
 	rq->__deadline = 0;
 
-	INIT_LIST_HEAD(&rq->timeout_list);
 	rq->timeout = 0;
 
 	rq->end_io = NULL;

block/blk-timeout.c

@@ -68,16 +68,6 @@ ssize_t part_timeout_store(struct device *dev, struct device_attribute *attr,
 
 #endif /* CONFIG_FAIL_IO_TIMEOUT */
 
-/*
- * blk_delete_timer - Delete/cancel timer for a given function.
- * @req:	request that we are canceling timer for
- *
- */
-void blk_delete_timer(struct request *req)
-{
-	list_del_init(&req->timeout_list);
-}
-
 /**
  * blk_abort_request -- Request request recovery for the specified command
  * @req:	pointer to the request of interest
@@ -123,8 +113,6 @@ void blk_add_timer(struct request *req)
 	struct request_queue *q = req->q;
 	unsigned long expiry;
 
-	BUG_ON(!list_empty(&req->timeout_list));
-
 	/*
 	 * Some LLDs, like scsi, peek at the timeout to prevent a
 	 * command from being retried forever.

block/blk.h

@@ -222,8 +222,6 @@ static inline bool bio_integrity_endio(struct bio *bio)
 
 unsigned long blk_rq_timeout(unsigned long timeout);
 void blk_add_timer(struct request *req);
-void blk_delete_timer(struct request *);
-
 
 bool bio_attempt_front_merge(struct request_queue *q, struct request *req,
 			     struct bio *bio);

include/linux/blkdev.h

@@ -228,8 +228,6 @@ struct request {
 	/* access through blk_rq_set_deadline, blk_rq_deadline */
 	unsigned long __deadline;
 
-	struct list_head timeout_list;
-
 	union {
 		struct __call_single_data csd;
 		u64 fifo_time;