This is a note to let you know that I've just added the patch titled
blk-cgroup: fix missing pd_online_fn() while activating policy
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
blk-cgroup-fix-missing-pd_online_fn-while-activating.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 88da27f574f32afcbb0066cab4f247eb5ea1b1d9
Author: Yu Kuai <yukuai3@xxxxxxxxxx>
Date: Tue Jan 3 19:28:33 2023 +0800
blk-cgroup: fix missing pd_online_fn() while activating policy
[ Upstream commit e3ff8887e7db757360f97634e0d6f4b8e27a8c46 ]
If the policy defines pd_online_fn(), it should be called after
pd_init_fn(), like blkg_create().
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230103112833.2013432-1-yukuai1@xxxxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 484c6b2dd264..c623632c1cda 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1370,6 +1370,10 @@ int blkcg_activate_policy(struct request_queue *q,
list_for_each_entry_reverse(blkg, &q->blkg_list, q_node)
pol->pd_init_fn(blkg->pd[pol->plid]);
+ if (pol->pd_online_fn)
+ list_for_each_entry_reverse(blkg, &q->blkg_list, q_node)
+ pol->pd_online_fn(blkg->pd[pol->plid]);
+
__set_bit(pol->plid, q->blkcg_pols);
ret = 0;
