1 files changed, 32 insertions, 42 deletions

diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h
index 3cf92cbbd8ac..1326526bb733 100644
--- a/block/blk-mq-sched.h
+++ b/block/blk-mq-sched.h
@@ -2,79 +2,69 @@
 #ifndef BLK_MQ_SCHED_H
 #define BLK_MQ_SCHED_H
 
+#include "elevator.h"
 #include "blk-mq.h"
-#include "blk-mq-tag.h"
 
-void blk_mq_sched_free_hctx_data(struct request_queue *q,
-				 void (*exit)(struct blk_mq_hw_ctx *));
+#define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ)
 
-void blk_mq_sched_assign_ioc(struct request *rq);
-
-void blk_mq_sched_request_inserted(struct request *rq);
 bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
-				struct request **merged_request);
-bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio);
-bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
+		unsigned int nr_segs, struct request **merged_request);
+bool blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
+		unsigned int nr_segs);
+bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq,
+				   struct list_head *free);
 void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
-void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
-
-void blk_mq_sched_insert_request(struct request *rq, bool at_head,
-				 bool run_queue, bool async);
-void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
-				  struct blk_mq_ctx *ctx,
-				  struct list_head *list, bool run_queue_async);
+void __blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
 
 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
 
 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
-void blk_mq_sched_free_requests(struct request_queue *q);
+void blk_mq_sched_free_rqs(struct request_queue *q);
 
-static inline bool
-blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio)
+static inline void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
 {
-	if (blk_queue_nomerges(q) || !bio_mergeable(bio))
-		return false;
+	if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
+		__blk_mq_sched_restart(hctx);
+}
 
-	return __blk_mq_sched_bio_merge(q, bio);
+static inline bool bio_mergeable(struct bio *bio)
+{
+	return !(bio->bi_opf & REQ_NOMERGE_FLAGS);
 }
 
 static inline bool
 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
 			 struct bio *bio)
 {
-	struct elevator_queue *e = q->elevator;
-
-	if (e && e->type->ops.allow_merge)
-		return e->type->ops.allow_merge(q, rq, bio);
+	if (rq->rq_flags & RQF_USE_SCHED) {
+		struct elevator_queue *e = q->elevator;
 
+		if (e->type->ops.allow_merge)
+			return e->type->ops.allow_merge(q, rq, bio);
+	}
 	return true;
 }
 
 static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
 {
-	struct elevator_queue *e = rq->q->elevator;
-
-	if (e && e->type->ops.completed_request)
-		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 (rq->rq_flags & RQF_USE_SCHED) {
+		struct elevator_queue *e = rq->q->elevator;
 
-	if (e && e->type->ops.started_request)
-		e->type->ops.started_request(rq);
+		if (e->type->ops.completed_request)
+			e->type->ops.completed_request(rq, now);
+	}
 }
 
 static inline void blk_mq_sched_requeue_request(struct request *rq)
 {
-	struct request_queue *q = rq->q;
-	struct elevator_queue *e = q->elevator;
+	if (rq->rq_flags & RQF_USE_SCHED) {
+		struct request_queue *q = rq->q;
+		struct elevator_queue *e = q->elevator;
 
-	if (e && e->type->ops.requeue_request)
-		e->type->ops.requeue_request(rq);
+		if (e->type->ops.requeue_request)
+			e->type->ops.requeue_request(rq);
+	}
 }
 
 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)