[PATCH 29/42] block: prepare elevator to use REQ_OPs.
From: <hidden>
Date: 2016-04-15 10:39:49
Also in:
dm-devel, linux-bcache, linux-btrfs, linux-f2fs-devel, linux-fsdevel, linux-raid, linux-scsi, linux-xfs, lkml, ocfs2-devel
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
From: Mike Christie <redacted> This patch converts the elevator code to use separate variables for the operation and flags, and to check request->op for the REQ_OP. Signed-off-by: Mike Christie <redacted> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.com> --- block/blk-core.c | 2 +- block/cfq-iosched.c | 4 ++-- block/elevator.c | 7 +++---- include/linux/elevator.h | 4 ++-- 4 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 3168962..a796b35 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c@@ -1081,7 +1081,7 @@ static struct request *__get_request(struct request_list *rl, int op, if (unlikely(blk_queue_dying(q))) return ERR_PTR(-ENODEV); - may_queue = elv_may_queue(q, op | op_flags); + may_queue = elv_may_queue(q, op, op_flags); if (may_queue == ELV_MQUEUE_NO) goto rq_starved;
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4a34978..3fcc598 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c@@ -4285,7 +4285,7 @@ static inline int __cfq_may_queue(struct cfq_queue *cfqq) return ELV_MQUEUE_MAY; } -static int cfq_may_queue(struct request_queue *q, int rw) +static int cfq_may_queue(struct request_queue *q, int op, int op_flags) { struct cfq_data *cfqd = q->elevator->elevator_data; struct task_struct *tsk = current;
@@ -4302,7 +4302,7 @@ static int cfq_may_queue(struct request_queue *q, int rw) if (!cic) return ELV_MQUEUE_MAY; - cfqq = cic_to_cfqq(cic, rw_is_sync(rw)); + cfqq = cic_to_cfqq(cic, rw_is_sync(op | op_flags)); if (cfqq) { cfq_init_prio_data(cfqq, cic);
diff --git a/block/elevator.c b/block/elevator.c
index c3555c9..6a282bf 100644
--- a/block/elevator.c
+++ b/block/elevator.c@@ -366,8 +366,7 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq) list_for_each_prev(entry, &q->queue_head) { struct request *pos = list_entry_rq(entry); - if ((rq->cmd_flags & REQ_DISCARD) != - (pos->cmd_flags & REQ_DISCARD)) + if ((rq->op == REQ_OP_DISCARD) != (pos->op == REQ_OP_DISCARD)) break; if (rq_data_dir(rq) != rq_data_dir(pos)) break;
@@ -717,12 +716,12 @@ void elv_put_request(struct request_queue *q, struct request *rq) e->type->ops.elevator_put_req_fn(rq); } -int elv_may_queue(struct request_queue *q, int rw) +int elv_may_queue(struct request_queue *q, int op, int op_flags) { struct elevator_queue *e = q->elevator; if (e->type->ops.elevator_may_queue_fn) - return e->type->ops.elevator_may_queue_fn(q, rw); + return e->type->ops.elevator_may_queue_fn(q, op, op_flags); return ELV_MQUEUE_MAY; }
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 638b324..953d286 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h@@ -26,7 +26,7 @@ typedef int (elevator_dispatch_fn) (struct request_queue *, int); typedef void (elevator_add_req_fn) (struct request_queue *, struct request *); typedef struct request *(elevator_request_list_fn) (struct request_queue *, struct request *); typedef void (elevator_completed_req_fn) (struct request_queue *, struct request *); -typedef int (elevator_may_queue_fn) (struct request_queue *, int); +typedef int (elevator_may_queue_fn) (struct request_queue *, int, int); typedef void (elevator_init_icq_fn) (struct io_cq *); typedef void (elevator_exit_icq_fn) (struct io_cq *);
@@ -134,7 +134,7 @@ extern struct request *elv_former_request(struct request_queue *, struct request extern struct request *elv_latter_request(struct request_queue *, struct request *); extern int elv_register_queue(struct request_queue *q); extern void elv_unregister_queue(struct request_queue *q); -extern int elv_may_queue(struct request_queue *, int); +extern int elv_may_queue(struct request_queue *, int, int); extern void elv_completed_request(struct request_queue *, struct request *); extern int elv_set_request(struct request_queue *q, struct request *rq, struct bio *bio, gfp_t gfp_mask);
--
2.7.2