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elevator: abstract out the activate and deactivate functions

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Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-01-14 22:26:09 +11:00 committed by Jens Axboe
parent 958b7f37ee
commit cad9751642
1 changed files with 20 additions and 9 deletions
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29
block/elevator.c
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@ -269,6 +269,22 @@ void elevator_exit(elevator_t *e)
EXPORT_SYMBOL(elevator_exit);
static void elv_activate_rq(request_queue_t *q, struct request *rq)
{
elevator_t *e = q->elevator;
if (e->ops->elevator_activate_req_fn)
e->ops->elevator_activate_req_fn(q, rq);
}
static void elv_deactivate_rq(request_queue_t *q, struct request *rq)
{
elevator_t *e = q->elevator;
if (e->ops->elevator_deactivate_req_fn)
e->ops->elevator_deactivate_req_fn(q, rq);
}
static inline void __elv_rqhash_del(struct request *rq)
{
hlist_del_init(&rq->hash);
@ -498,16 +514,14 @@ void elv_merge_requests(request_queue_t *q, struct request *rq,
void elv_requeue_request(request_queue_t *q, struct request *rq)
{
elevator_t *e = q->elevator;
/*
* it already went through dequeue, we need to decrement the
* in_flight count again
*/
if (blk_account_rq(rq)) {
q->in_flight--;
if (blk_sorted_rq(rq) && e->ops->elevator_deactivate_req_fn)
e->ops->elevator_deactivate_req_fn(q, rq);
if (blk_sorted_rq(rq))
elv_deactivate_rq(q, rq);
}
rq->cmd_flags &= ~REQ_STARTED;
@ -700,16 +714,13 @@ struct request *elv_next_request(request_queue_t *q)
while ((rq = __elv_next_request(q)) != NULL) {
if (!(rq->cmd_flags & REQ_STARTED)) {
elevator_t *e = q->elevator;
/*
* This is the first time the device driver
* sees this request (possibly after
* requeueing). Notify IO scheduler.
*/
if (blk_sorted_rq(rq) &&
e->ops->elevator_activate_req_fn)
e->ops->elevator_activate_req_fn(q, rq);
if (blk_sorted_rq(rq))
elv_activate_rq(q, rq);
/*
* just mark as started even if we don't start