Commit 3beb2077 authored by Tejun Heo's avatar Tejun Heo Committed by Jens Axboe
Browse files

[BLOCK] elevator: elv_latter/former_request update



With generic dispatch queue update, implicit former/latter request
handling using rq->queuelist.prev/next doesn't work as expected
anymore.  Also, the only iosched dependent on this feature was
noop-iosched and it has been reimplemented to have its own
latter/former methods.  This patch removes implicit former/latter
handling.
Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
parent 5a7c47ee
......@@ -541,33 +541,19 @@ int elv_queue_empty(request_queue_t *q)
struct request *elv_latter_request(request_queue_t *q, struct request *rq)
{
struct list_head *next;
elevator_t *e = q->elevator;
if (e->ops->elevator_latter_req_fn)
return e->ops->elevator_latter_req_fn(q, rq);
next = rq->queuelist.next;
if (next != &q->queue_head && next != &rq->queuelist)
return list_entry_rq(next);
return NULL;
}
struct request *elv_former_request(request_queue_t *q, struct request *rq)
{
struct list_head *prev;
elevator_t *e = q->elevator;
if (e->ops->elevator_former_req_fn)
return e->ops->elevator_former_req_fn(q, rq);
prev = rq->queuelist.prev;
if (prev != &q->queue_head && prev != &rq->queuelist)
return list_entry_rq(prev);
return NULL;
}
......
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