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authorChristoph Hellwig <hch@lst.de>2022-04-20 06:27:21 +0200
committerJens Axboe <axboe@kernel.dk>2022-05-02 22:06:20 +0200
commitd200ca143ac6d0b4391b4e811e67e1a36461d501 (patch)
treec20b3f366795081dbf51c8780f4ed88c33ead78d /block/blk-cgroup.c
parentblk-cgroup: move blkcg_css to blk-cgroup.c (diff)
downloadlinux-d200ca143ac6d0b4391b4e811e67e1a36461d501.tar.xz
linux-d200ca143ac6d0b4391b4e811e67e1a36461d501.zip
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: 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>
Diffstat (limited to 'block/blk-cgroup.c')
-rw-r--r--block/blk-cgroup.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 8da00ddc1766..5684a8ce1f75 100644
--- 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;