An earlier commit 7fcf2b033b84 ("blkcg: change blkg reference counting
to use percpu_ref") moved around the release call from blkg_put() to be
a part of the percpu_ref cleanup. Remove the additional unused code
which should have been removed earlier.
Signed-off-by: Dennis Zhou <[email protected]>
---
block/blk-cgroup.c | 23 -----------------------
1 file changed, 23 deletions(-)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index c8cc1cbb6370..2bed5725aa03 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -438,29 +438,6 @@ static void blkg_destroy_all(struct request_queue *q)
spin_unlock_irq(&q->queue_lock);
}
-/*
- * A group is RCU protected, but having an rcu lock does not mean that one
- * can access all the fields of blkg and assume these are valid. For
- * example, don't try to follow throtl_data and request queue links.
- *
- * Having a reference to blkg under an rcu allows accesses to only values
- * local to groups like group stats and group rate limits.
- */
-void __blkg_release_rcu(struct rcu_head *rcu_head)
-{
- struct blkcg_gq *blkg = container_of(rcu_head, struct blkcg_gq, rcu_head);
-
- /* release the blkcg and parent blkg refs this blkg has been holding */
- css_put(&blkg->blkcg->css);
- if (blkg->parent)
- blkg_put(blkg->parent);
-
- wb_congested_put(blkg->wb_congested);
-
- blkg_free(blkg);
-}
-EXPORT_SYMBOL_GPL(__blkg_release_rcu);
-
static int blkcg_reset_stats(struct cgroup_subsys_state *css,
struct cftype *cftype, u64 val)
{
--
2.17.1
On 12/19/18 3:43 PM, Dennis Zhou wrote:
> An earlier commit 7fcf2b033b84 ("blkcg: change blkg reference counting
> to use percpu_ref") moved around the release call from blkg_put() to be
> a part of the percpu_ref cleanup. Remove the additional unused code
> which should have been removed earlier.
Applied for 4.21, thanks.
--
Jens Axboe