[BLOCK] kill generic max_back_kb handling
This patch kills max_back_kb handling from elv_dispatch_sort() and
kills max_back_kb field from struct request_queue.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/drivers/block/elevator.c b/drivers/block/elevator.c
index 4151443..af2388e 100644
--- a/drivers/block/elevator.c
+++ b/drivers/block/elevator.c
@@ -136,7 +136,6 @@
q->elevator = eq;
q->end_sector = 0;
q->boundary_rq = NULL;
- q->max_back_kb = 0;
if (eq->ops->elevator_init_fn)
ret = eq->ops->elevator_init_fn(q, eq);
@@ -227,16 +226,13 @@
void elv_dispatch_sort(request_queue_t *q, struct request *rq)
{
sector_t boundary;
- unsigned max_back;
struct list_head *entry;
if (q->last_merge == rq)
q->last_merge = NULL;
boundary = q->end_sector;
- max_back = q->max_back_kb * 2;
- boundary = boundary > max_back ? boundary - max_back : 0;
-
+
list_for_each_prev(entry, &q->queue_head) {
struct request *pos = list_entry_rq(entry);