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| author | Aaron Carroll <aaronc@gelato.unsw.edu.au> | 2008-08-14 10:17:14 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:03 +0200 |
| commit | 4fb72f7646e86874eb2798256eaa6bf3fbe4edcf (patch) | |
| tree | 0c32819099dd65494010514ecea4e2c39b372315 /block/deadline-iosched.c | |
| parent | deadline-iosched: allow non-sequential batching (diff) | |
| download | linux-4fb72f7646e86874eb2798256eaa6bf3fbe4edcf.tar.xz linux-4fb72f7646e86874eb2798256eaa6bf3fbe4edcf.zip | |
deadline-iosched: non-functional fixes
* 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>
Diffstat (limited to 'block/deadline-iosched.c')
| -rw-r--r-- | block/deadline-iosched.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c index 07b80e4642f9..fd311179f44c 100644 --- a/block/deadline-iosched.c +++ b/block/deadline-iosched.c @@ -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) |