rt2x00: Dump beacons under a different identifier than TX frames.

[safe/jmp/linux-2.6] / block / blk-cgroup.c

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 3ad497f..c85d74c 100644 (file)
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -14,6 +14,7 @@
 #include <linux/seq_file.h>
 #include <linux/kdev_t.h>
 #include <linux/module.h>
+#include <linux/err.h>
 #include "blk-cgroup.h"
 
 static DEFINE_SPINLOCK(blkio_list_lock);
@@ -22,20 +23,6 @@ static LIST_HEAD(blkio_list);
 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),
@@ -146,16 +133,16 @@ blkiocg_weight_write(struct cgroup *cgroup, struct cftype *cftype, u64 val)
                return -EINVAL;
 
        blkcg = cgroup_to_blkio_cgroup(cgroup);
+       spin_lock(&blkio_list_lock);
        spin_lock_irq(&blkcg->lock);
        blkcg->weight = (unsigned int)val;
        hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) {
-               spin_lock(&blkio_list_lock);
                list_for_each_entry(blkiop, &blkio_list, list)
                        blkiop->ops.blkio_update_group_weight_fn(blkg,
                                        blkcg->weight);
-               spin_unlock(&blkio_list_lock);
        }
        spin_unlock_irq(&blkcg->lock);
+       spin_unlock(&blkio_list_lock);
        return 0;
 }