Commit d200ca14 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

blk-cgroup: cleanup blk_cgroup_congested 



Use blkcg_css instead of open coding it, and switch to a slightly
more natural for loop.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarTejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-14-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent bc5fee91

block/blk-cgroup.c

+1 −5
Original line number Diff line number Diff line
@@ -2038,15 +2038,11 @@ bool blk_cgroup_congested(void) 
	bool ret = false;



	rcu_read_lock();

	css = kthread_blkcg();

	if (!css)

		css = task_css(current, io_cgrp_id);

	while (css) {

	for (css = blkcg_css(); css; css = css->parent) {

		if (atomic_read(&css->cgroup->congestion_count)) {

			ret = true;

			break;

		}

		css = css->parent;

	}

	rcu_read_unlock();

	return ret;