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-rw-r--r--block/blk-cgroup.c39
1 files changed, 22 insertions, 17 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index b950306838ad..6bbe0a939596 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -51,18 +51,8 @@ static void blkg_free(struct blkcg_gq *blkg)
if (!blkg)
return;
- for (i = 0; i < BLKCG_MAX_POLS; i++) {
- struct blkcg_policy *pol = blkcg_policy[i];
- struct blkg_policy_data *pd = blkg->pd[i];
-
- if (!pd)
- continue;
-
- if (pol && pol->pd_exit_fn)
- pol->pd_exit_fn(blkg);
-
- kfree(pd);
- }
+ for (i = 0; i < BLKCG_MAX_POLS; i++)
+ kfree(blkg->pd[i]);
blk_exit_rl(&blkg->rl);
kfree(blkg);
@@ -114,10 +104,6 @@ static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct request_queue *q,
blkg->pd[i] = pd;
pd->blkg = blkg;
pd->plid = i;
-
- /* invoke per-policy init */
- if (pol->pd_init_fn)
- pol->pd_init_fn(blkg);
}
return blkg;
@@ -214,7 +200,7 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
}
blkg = new_blkg;
- /* link parent and insert */
+ /* link parent */
if (blkcg_parent(blkcg)) {
blkg->parent = __blkg_lookup(blkcg_parent(blkcg), q, false);
if (WARN_ON_ONCE(!blkg->parent)) {
@@ -224,6 +210,15 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
blkg_get(blkg->parent);
}
+ /* invoke per-policy init */
+ for (i = 0; i < BLKCG_MAX_POLS; i++) {
+ struct blkcg_policy *pol = blkcg_policy[i];
+
+ if (blkg->pd[i] && pol->pd_init_fn)
+ pol->pd_init_fn(blkg);
+ }
+
+ /* insert */
spin_lock(&blkcg->lock);
ret = radix_tree_insert(&blkcg->blkg_tree, q->id, blkg);
if (likely(!ret)) {
@@ -381,6 +376,16 @@ static void blkg_rcu_free(struct rcu_head *rcu_head)
void __blkg_release(struct blkcg_gq *blkg)
{
+ int i;
+
+ /* tell policies that this one is being freed */
+ for (i = 0; i < BLKCG_MAX_POLS; i++) {
+ struct blkcg_policy *pol = blkcg_policy[i];
+
+ if (blkg->pd[i] && pol->pd_exit_fn)
+ pol->pd_exit_fn(blkg);
+ }
+
/* release the blkcg and parent blkg refs this blkg has been holding */
css_put(&blkg->blkcg->css);
if (blkg->parent)