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Commit 6b450535 authored by Dennis Zhou's avatar Dennis Zhou Committed by Jens Axboe
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blkcg: remove unused __blkg_release_rcu() 



An earlier commit 7fcf2b03 ("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: default avatarDennis Zhou <dennis@kernel.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6ab21879

block/blk-cgroup.c

+0 −23
Original line number Diff line number Diff line
@@ -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)

{