[PATCH] blk-mq: remove the bio argument to ->prepare_request

[Christoph Hellwig <hch@xxxxxx>]

None of the I/O schedulers actually needs it.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 block/bfq-iosched.c      | 2 +-
 block/blk-mq.c           | 2 +-
 block/kyber-iosched.c    | 2 +-
 block/mq-deadline.c      | 2 +-
 include/linux/elevator.h | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 3d411716d7ee4..50c8f034c01c5 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -6073,7 +6073,7 @@ static struct bfq_queue *bfq_get_bfqq_handle_split(struct bfq_data *bfqd,
  * comments on bfq_init_rq for the reason behind this delayed
  * preparation.
  */
-static void bfq_prepare_request(struct request *rq, struct bio *bio)
+static void bfq_prepare_request(struct request *rq)
 {
 	/*
 	 * Regardless of whether we have an icq attached, we have to
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 6f0279a7b59aa..60adad51ad816 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -387,7 +387,7 @@ static struct request *blk_mq_get_request(struct request_queue *q,
 			if (e->type->icq_cache)
 				blk_mq_sched_assign_ioc(rq);
 
-			e->type->ops.prepare_request(rq, bio);
+			e->type->ops.prepare_request(rq);
 			rq->rq_flags |= RQF_ELVPRIV;
 		}
 	}
diff --git a/block/kyber-iosched.c b/block/kyber-iosched.c
index 34dcea0ef6377..a38c5ab103d12 100644
--- a/block/kyber-iosched.c
+++ b/block/kyber-iosched.c
@@ -579,7 +579,7 @@ static bool kyber_bio_merge(struct blk_mq_hw_ctx *hctx, struct bio *bio,
 	return merged;
 }
 
-static void kyber_prepare_request(struct request *rq, struct bio *bio)
+static void kyber_prepare_request(struct request *rq)
 {
 	rq_set_domain_token(rq, -1);
 }
diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index b490f47fd553c..b57470e154c8f 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -541,7 +541,7 @@ static void dd_insert_requests(struct blk_mq_hw_ctx *hctx,
  * Nothing to do here. This is defined only to ensure that .finish_request
  * method is called upon request completion.
  */
-static void dd_prepare_request(struct request *rq, struct bio *bio)
+static void dd_prepare_request(struct request *rq)
 {
 }
 
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 901bda352dcb7..bacc40a0bdf39 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -39,7 +39,7 @@ struct elevator_mq_ops {
 	void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
 	void (*requests_merged)(struct request_queue *, struct request *, struct request *);
 	void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
-	void (*prepare_request)(struct request *, struct bio *bio);
+	void (*prepare_request)(struct request *);
 	void (*finish_request)(struct request *);
 	void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
 	struct request *(*dispatch_request)(struct blk_mq_hw_ctx *);
-- 
2.26.2