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cfq-iosched: minor cleanups 

* Some were accessing cic->cfqq[] directly.  Always use cic_to_cfqq()
  and cic_set_cfqq().

* check_ioprio_changed() doesn't need to verify cfq_get_queue()'s
  return for NULL.  It's always non-NULL.  Simplify accordingly.

This patch doesn't cause any functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Tejun Heo 2015-08-18 14:55:00 -07:00 committed by Jens Axboe
parent bce6133b09
commit 563180a44b
1 changed files with 11 additions and 15 deletions
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24
block/cfq-iosched.c
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@ -3506,14 +3506,14 @@ static void cfq_exit_icq(struct io_cq *icq)
struct cfq_io_cq *cic = icq_to_cic(icq);
struct cfq_data *cfqd = cic_to_cfqd(cic);
if (cic->cfqq[BLK_RW_ASYNC]) {
cfq_exit_cfqq(cfqd, cic->cfqq[BLK_RW_ASYNC]);
cic->cfqq[BLK_RW_ASYNC] = NULL;
if (cic_to_cfqq(cic, false)) {
cfq_exit_cfqq(cfqd, cic_to_cfqq(cic, false));
cic_set_cfqq(cic, NULL, false);
}
if (cic->cfqq[BLK_RW_SYNC]) {
cfq_exit_cfqq(cfqd, cic->cfqq[BLK_RW_SYNC]);
cic->cfqq[BLK_RW_SYNC] = NULL;
if (cic_to_cfqq(cic, true)) {
cfq_exit_cfqq(cfqd, cic_to_cfqq(cic, true));
cic_set_cfqq(cic, NULL, true);
}
}
@ -3572,18 +3572,14 @@ static void check_ioprio_changed(struct cfq_io_cq *cic, struct bio *bio)
if (unlikely(!cfqd) || likely(cic->ioprio == ioprio))
return;
cfqq = cic->cfqq[BLK_RW_ASYNC];
cfqq = cic_to_cfqq(cic, false);
if (cfqq) {
struct cfq_queue *new_cfqq;
new_cfqq = cfq_get_queue(cfqd, BLK_RW_ASYNC, cic, bio,
GFP_ATOMIC);
if (new_cfqq) {
cic->cfqq[BLK_RW_ASYNC] = new_cfqq;
cfq_put_queue(cfqq);
}
cfqq = cfq_get_queue(cfqd, BLK_RW_ASYNC, cic, bio, GFP_ATOMIC);
cic_set_cfqq(cic, cfqq, false);
}
cfqq = cic->cfqq[BLK_RW_SYNC];
cfqq = cic_to_cfqq(cic, true);
if (cfqq)
cfq_mark_cfqq_prio_changed(cfqq);