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blk-cgroup: cleanup blk_cgroup_congested
author
Christoph Hellwig
<hch@lst.de>
Wed, 20 Apr 2022 04:27:21 +0000
(06:27 +0200)
committer
Jens Axboe
<axboe@kernel.dk>
Mon, 2 May 2022 20:06:20 +0000
(14:06 -0600)
Use blkcg_css instead of open coding it, and switch to a slightly
more natural for loop.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link:
https://lore.kernel.org/r/20220420042723.1010598-14-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-cgroup.c
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diff --git
a/block/blk-cgroup.c
b/block/blk-cgroup.c
index
8da00dd
..
5684a8c
100644
(file)
--- a/
block/blk-cgroup.c
+++ b/
block/blk-cgroup.c
@@
-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;