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Subject[PATCH v2] block: blk-mq: Remove blk_mq_sched_started_request and started_request
Date
blk_mq_sched_completed_request is a function that checks if the elevator
related to the request has started_request implemented, but currently, none of
the available IO schedulers implement started_request, so remove both.

Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
---
Changes from v1:
This was previously two patches, one removing blk_mq_sched_completed_request
and another one removing started_request, but now they are merged into this
commit.

block/blk-mq-sched.h | 9 ---------
block/blk-mq.c | 2 --
include/linux/elevator.h | 1 -
3 files changed, 12 deletions(-)

diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h
index cf22ab00fefb..126021fc3a11 100644
--- a/block/blk-mq-sched.h
+++ b/block/blk-mq-sched.h
@@ -61,15 +61,6 @@ static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
e->type->ops.completed_request(rq, now);
}

-static inline void blk_mq_sched_started_request(struct request *rq)
-{
- struct request_queue *q = rq->q;
- struct elevator_queue *e = q->elevator;
-
- if (e && e->type->ops.started_request)
- e->type->ops.started_request(rq);
-}
-
static inline void blk_mq_sched_requeue_request(struct request *rq)
{
struct request_queue *q = rq->q;
diff --git a/block/blk-mq.c b/block/blk-mq.c
index b038ec680e84..3e8902714253 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -669,8 +669,6 @@ void blk_mq_start_request(struct request *rq)
{
struct request_queue *q = rq->q;

- blk_mq_sched_started_request(rq);
-
trace_block_rq_issue(q, rq);

if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) {
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 17cd0078377c..1dd014c9c87b 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -45,7 +45,6 @@ struct elevator_mq_ops {
struct request *(*dispatch_request)(struct blk_mq_hw_ctx *);
bool (*has_work)(struct blk_mq_hw_ctx *);
void (*completed_request)(struct request *, u64);
- void (*started_request)(struct request *);
void (*requeue_request)(struct request *);
struct request *(*former_request)(struct request_queue *, struct request *);
struct request *(*next_request)(struct request_queue *, struct request *);
--
2.22.0
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