diff options
| -rw-r--r-- | block/blk-cgroup.c | 22 | ||||
| -rw-r--r-- | block/blk-cgroup.h | 3 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 4 |
3 files changed, 27 insertions, 2 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 73a5525cc0a..4d4a277b290 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -13,16 +13,33 @@ #include <linux/ioprio.h> #include <linux/seq_file.h> #include <linux/kdev_t.h> +#include <linux/module.h> #include "blk-cgroup.h" #include "cfq-iosched.h" struct blkio_cgroup blkio_root_cgroup = { .weight = 2*BLKIO_WEIGHT_DEFAULT }; +EXPORT_SYMBOL_GPL(blkio_root_cgroup); + +bool blkiocg_css_tryget(struct blkio_cgroup *blkcg) +{ + if (!css_tryget(&blkcg->css)) + return false; + return true; +} +EXPORT_SYMBOL_GPL(blkiocg_css_tryget); + +void blkiocg_css_put(struct blkio_cgroup *blkcg) +{ + css_put(&blkcg->css); +} +EXPORT_SYMBOL_GPL(blkiocg_css_put); struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return container_of(cgroup_subsys_state(cgroup, blkio_subsys_id), struct blkio_cgroup, css); } +EXPORT_SYMBOL_GPL(cgroup_to_blkio_cgroup); void blkiocg_update_blkio_group_stats(struct blkio_group *blkg, unsigned long time, unsigned long sectors) @@ -30,6 +47,7 @@ void blkiocg_update_blkio_group_stats(struct blkio_group *blkg, blkg->time += time; blkg->sectors += sectors; } +EXPORT_SYMBOL_GPL(blkiocg_update_blkio_group_stats); void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, struct blkio_group *blkg, void *key, dev_t dev) @@ -47,6 +65,7 @@ void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, #endif blkg->dev = dev; } +EXPORT_SYMBOL_GPL(blkiocg_add_blkio_group); static void __blkiocg_del_blkio_group(struct blkio_group *blkg) { @@ -81,6 +100,7 @@ out: rcu_read_unlock(); return ret; } +EXPORT_SYMBOL_GPL(blkiocg_del_blkio_group); /* called under rcu_read_lock(). */ struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) @@ -97,6 +117,7 @@ struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) return NULL; } +EXPORT_SYMBOL_GPL(blkiocg_lookup_group); #define SHOW_FUNCTION(__VAR) \ static u64 blkiocg_##__VAR##_read(struct cgroup *cgroup, \ @@ -166,6 +187,7 @@ void blkiocg_update_blkio_group_dequeue_stats(struct blkio_group *blkg, { blkg->dequeue += dequeue; } +EXPORT_SYMBOL_GPL(blkiocg_update_blkio_group_dequeue_stats); #endif struct cftype blkio_files[] = { diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index 257dc6a956b..4f89b967467 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -43,6 +43,9 @@ struct blkio_group { unsigned long sectors; }; +extern bool blkiocg_css_tryget(struct blkio_cgroup *blkcg); +extern void blkiocg_css_put(struct blkio_cgroup *blkcg); + #else struct blkio_group { diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index b00ca4c86e2..7f3f343b0c6 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -961,7 +961,7 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create) unsigned int major, minor; /* Do we need to take this reference */ - if (!css_tryget(&blkcg->css)) + if (!blkiocg_css_tryget(blkcg)) return NULL;; cfqg = cfqg_of_blkg(blkiocg_lookup_group(blkcg, key)); @@ -994,7 +994,7 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create) hlist_add_head(&cfqg->cfqd_node, &cfqd->cfqg_list); done: - css_put(&blkcg->css); + blkiocg_css_put(blkcg); return cfqg; } |