From: Christoph Hellwig <hch@lst.de>
Date: Wed, 20 Apr 2022 06:27:22 +0200
Subject: [PATCH] blk-cgroup: cleanup blkcg_maybe_throttle_current
Git-commit: 82778259eb201870d6d4f95ca4162de60a682343
Patch-mainline: v5.19-rc1
References: jsc#PED-1183
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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/blk-cgroup.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 5684a8ce1f75..a91f8ae18b49 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -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);
--
2.35.3