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-rw-r--r--block/cfq-iosched.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 673c977cc2b..fb52df9744f 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -17,8 +17,6 @@
#include "blk.h"
#include "blk-cgroup.h"
-static struct blkcg_policy blkcg_policy_cfq __maybe_unused;
-
/*
* tunables
*/
@@ -418,11 +416,6 @@ static inline struct cfq_group *pd_to_cfqg(struct blkg_policy_data *pd)
return pd ? container_of(pd, struct cfq_group, pd) : NULL;
}
-static inline struct cfq_group *blkg_to_cfqg(struct blkcg_gq *blkg)
-{
- return pd_to_cfqg(blkg_to_pd(blkg, &blkcg_policy_cfq));
-}
-
static inline struct blkcg_gq *cfqg_to_blkg(struct cfq_group *cfqg)
{
return pd_to_blkg(&cfqg->pd);
@@ -572,6 +565,13 @@ static inline void cfqg_stats_update_avg_queue_size(struct cfq_group *cfqg) { }
#ifdef CONFIG_CFQ_GROUP_IOSCHED
+static struct blkcg_policy blkcg_policy_cfq;
+
+static inline struct cfq_group *blkg_to_cfqg(struct blkcg_gq *blkg)
+{
+ return pd_to_cfqg(blkg_to_pd(blkg, &blkcg_policy_cfq));
+}
+
static inline void cfqg_get(struct cfq_group *cfqg)
{
return blkg_get(cfqg_to_blkg(cfqg));
@@ -3951,10 +3951,11 @@ static void cfq_exit_queue(struct elevator_queue *e)
cfq_shutdown_timer_wq(cfqd);
-#ifndef CONFIG_CFQ_GROUP_IOSCHED
+#ifdef CONFIG_CFQ_GROUP_IOSCHED
+ blkcg_deactivate_policy(q, &blkcg_policy_cfq);
+#else
kfree(cfqd->root_group);
#endif
- blkcg_deactivate_policy(q, &blkcg_policy_cfq);
kfree(cfqd);
}
@@ -4194,14 +4195,15 @@ static int __init cfq_init(void)
#ifdef CONFIG_CFQ_GROUP_IOSCHED
if (!cfq_group_idle)
cfq_group_idle = 1;
-#else
- cfq_group_idle = 0;
-#endif
ret = blkcg_policy_register(&blkcg_policy_cfq);
if (ret)
return ret;
+#else
+ cfq_group_idle = 0;
+#endif
+ ret = -ENOMEM;
cfq_pool = KMEM_CACHE(cfq_queue, 0);
if (!cfq_pool)
goto err_pol_unreg;
@@ -4215,13 +4217,17 @@ static int __init cfq_init(void)
err_free_pool:
kmem_cache_destroy(cfq_pool);
err_pol_unreg:
+#ifdef CONFIG_CFQ_GROUP_IOSCHED
blkcg_policy_unregister(&blkcg_policy_cfq);
+#endif
return ret;
}
static void __exit cfq_exit(void)
{
+#ifdef CONFIG_CFQ_GROUP_IOSCHED
blkcg_policy_unregister(&blkcg_policy_cfq);
+#endif
elv_unregister(&iosched_cfq);
kmem_cache_destroy(cfq_pool);
}