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blk-ioprio: remove ioprio_blkcg_from_bio()

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Currently, if config is enabled, then ioprio is always enabled by
default from blkcg_init_disk(), hence there is no point to check if
the policy is enabled from blkg in ioprio_blkcg_from_bio(). Hence remove
it and get blkcg directly from bio.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240719071506.158075-3-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Yu Kuai 2024-07-19 15:15:05 +08:00 committed by Jens Axboe
parent ae8650b45d
commit d0e9279599
1 changed files with 1 additions and 11 deletions
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12
block/blk-ioprio.c
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@ -84,16 +84,6 @@ ioprio_blkcg_from_css(struct cgroup_subsys_state *css)
return blkcg_to_ioprio_blkcg(css_to_blkcg(css)); return blkcg_to_ioprio_blkcg(css_to_blkcg(css));
} }
static struct ioprio_blkcg *ioprio_blkcg_from_bio(struct bio *bio)
{
struct blkg_policy_data *pd = blkg_to_pd(bio->bi_blkg, &ioprio_policy);
if (!pd)
return NULL;
return blkcg_to_ioprio_blkcg(pd->blkg->blkcg);
}
static int ioprio_show_prio_policy(struct seq_file *sf, void *v) static int ioprio_show_prio_policy(struct seq_file *sf, void *v)
{ {
struct ioprio_blkcg *blkcg = ioprio_blkcg_from_css(seq_css(sf)); struct ioprio_blkcg *blkcg = ioprio_blkcg_from_css(seq_css(sf));
@ -186,7 +176,7 @@ static struct blkcg_policy ioprio_policy = {
void blkcg_set_ioprio(struct bio *bio) void blkcg_set_ioprio(struct bio *bio)
{ {
struct ioprio_blkcg *blkcg = ioprio_blkcg_from_bio(bio); struct ioprio_blkcg *blkcg = blkcg_to_ioprio_blkcg(bio->bi_blkg->blkcg);
u16 prio; u16 prio;
if (!blkcg || blkcg->prio_policy == POLICY_NO_CHANGE) if (!blkcg || blkcg->prio_policy == POLICY_NO_CHANGE)