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