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authorDennis Zhou <dennis@kernel.org>2018-12-19 16:43:53 -0600
committerJens Axboe <axboe@kernel.dk>2018-12-21 08:47:58 -0700
commit6b4505352e4b1ee27faa97ae46b9baa8bc6a31f0 (patch)
tree80cafb7e41f07569eeacf1afd3816ffb97a80be8 /block
parent6ab2187992f4b0112852e5a097a2b6c7d167e2e5 (diff)
downloadlinux-stericsson-6b4505352e4b1ee27faa97ae46b9baa8bc6a31f0.tar.gz
blkcg: remove unused __blkg_release_rcu()
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 <dennis@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.c23
1 files changed, 0 insertions, 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)
{