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deadline-iosched: non-functional fixes

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* convert goto to simpler while loop;
 * use rq_end_sector() instead of computing manually;
 * fix false comments;
 * remove spurious whitespace;
 * convert rq_rb_root macro to an inline function.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Aaron Carroll 2008-08-14 18:17:14 +10:00 committed by Jens Axboe
parent 63de428b13
commit 4fb72f7646
1 changed files with 13 additions and 13 deletions
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26
block/deadline-iosched.c
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@ -33,7 +33,7 @@ struct deadline_data {
*/
struct rb_root sort_list[2];
struct list_head fifo_list[2];
/*
* next in sort order. read, write or both are NULL
*/
@ -53,7 +53,11 @@ struct deadline_data {
static void deadline_move_request(struct deadline_data *, struct request *);
#define RQ_RB_ROOT(dd, rq) (&(dd)->sort_list[rq_data_dir((rq))])
static inline struct rb_root *
deadline_rb_root(struct deadline_data *dd, struct request *rq)
{
return &dd->sort_list[rq_data_dir(rq)];
}
/*
* get the request after `rq' in sector-sorted order
@ -72,15 +76,11 @@ deadline_latter_request(struct request *rq)
static void
deadline_add_rq_rb(struct deadline_data *dd, struct request *rq)
{
struct rb_root *root = RQ_RB_ROOT(dd, rq);
struct rb_root *root = deadline_rb_root(dd, rq);
struct request *__alias;
retry:
__alias = elv_rb_add(root, rq);
if (unlikely(__alias)) {
while (unlikely(__alias = elv_rb_add(root, rq)))
deadline_move_request(dd, __alias);
goto retry;
}
}
static inline void
@ -91,7 +91,7 @@ deadline_del_rq_rb(struct deadline_data *dd, struct request *rq)
if (dd->next_rq[data_dir] == rq)
dd->next_rq[data_dir] = deadline_latter_request(rq);
elv_rb_del(RQ_RB_ROOT(dd, rq), rq);
elv_rb_del(deadline_rb_root(dd, rq), rq);
}
/*
@ -106,7 +106,7 @@ deadline_add_request(struct request_queue *q, struct request *rq)
deadline_add_rq_rb(dd, rq);
/*
* set expire time (only used for reads) and add to fifo list
* set expire time and add to fifo list
*/
rq_set_fifo_time(rq, jiffies + dd->fifo_expire[data_dir]);
list_add_tail(&rq->queuelist, &dd->fifo_list[data_dir]);
@ -162,7 +162,7 @@ static void deadline_merged_request(struct request_queue *q,
* if the merge was a front merge, we need to reposition request
*/
if (type == ELEVATOR_FRONT_MERGE) {
elv_rb_del(RQ_RB_ROOT(dd, req), req);
elv_rb_del(deadline_rb_root(dd, req), req);
deadline_add_rq_rb(dd, req);
}
}
@ -212,7 +212,7 @@ deadline_move_request(struct deadline_data *dd, struct request *rq)
dd->next_rq[WRITE] = NULL;
dd->next_rq[data_dir] = deadline_latter_request(rq);
dd->last_sector = rq->sector + rq->nr_sectors;
dd->last_sector = rq_end_sector(rq);
/*
* take it off the sort and fifo list, move
@ -222,7 +222,7 @@ deadline_move_request(struct deadline_data *dd, struct request *rq)
}
/*
* deadline_check_fifo returns 0 if there are no expired reads on the fifo,
* deadline_check_fifo returns 0 if there are no expired requests on the fifo,
* 1 otherwise. Requires !list_empty(&dd->fifo_list[data_dir])
*/
static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)