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blk-cgroup: cleanup blkcg_maybe_throttle_current

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Use blkcg_css instead of opencoding it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-04-20 06:27:22 +02:00 committed by Jens Axboe
parent d200ca143a
commit 82778259eb
1 changed files with 1 additions and 7 deletions
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8
block/blk-cgroup.c
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@ -1808,7 +1808,6 @@ static void blkcg_maybe_throttle_blkg(struct blkcg_gq *blkg, bool use_memdelay)
void blkcg_maybe_throttle_current(void)
{
struct request_queue *q = current->throttle_queue;
struct cgroup_subsys_state *css;
struct blkcg *blkcg;
struct blkcg_gq *blkg;
bool use_memdelay = current->use_memdelay;
@ -1820,12 +1819,7 @@ void blkcg_maybe_throttle_current(void)
current->use_memdelay = false;
rcu_read_lock();
css = kthread_blkcg();
if (css)
blkcg = css_to_blkcg(css);
else
blkcg = css_to_blkcg(task_css(current, io_cgrp_id));
blkcg = css_to_blkcg(blkcg_css());
if (!blkcg)
goto out;
blkg = blkg_lookup(blkcg, q);