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-rw-r--r--block/blk-cgroup.c35
1 files changed, 17 insertions, 18 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 0b3226cbf3f2..0e368387497d 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -116,7 +116,6 @@ static bool blkcg_policy_enabled(struct request_queue *q,
static void blkg_free(struct blkcg_gq *blkg)
{
- struct request_queue *q = blkg->q;
int i;
/*
@@ -126,16 +125,16 @@ static void blkg_free(struct blkcg_gq *blkg)
* blkcg_mutex is used to synchronize blkg_free_workfn() and
* blkcg_deactivate_policy().
*/
- mutex_lock(&q->blkcg_mutex);
+ mutex_lock(&blkg->disk->queue->blkcg_mutex);
for (i = 0; i < BLKCG_MAX_POLS; i++)
if (blkg->pd[i])
blkcg_policy[i]->pd_free_fn(blkg->pd[i]);
if (blkg->parent)
blkg_put(blkg->parent);
list_del_init(&blkg->q_node);
- mutex_unlock(&q->blkcg_mutex);
+ mutex_unlock(&blkg->disk->queue->blkcg_mutex);
- blk_put_queue(q);
+ put_disk(blkg->disk);
free_percpu(blkg->iostat_cpu);
percpu_ref_exit(&blkg->refcnt);
kfree(blkg);
@@ -251,10 +250,12 @@ static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct gendisk *disk,
blkg->iostat_cpu = alloc_percpu_gfp(struct blkg_iostat_set, gfp_mask);
if (!blkg->iostat_cpu)
goto out_exit_refcnt;
- if (!blk_get_queue(disk->queue))
+
+ if (test_bit(GD_DEAD, &disk->state))
goto out_free_iostat;
+ get_device(disk_to_dev(disk));
+ blkg->disk = disk;
- blkg->q = disk->queue;
INIT_LIST_HEAD(&blkg->q_node);
spin_lock_init(&blkg->async_bio_lock);
bio_list_init(&blkg->async_bios);
@@ -290,7 +291,7 @@ out_free_pds:
while (--i >= 0)
if (blkg->pd[i])
blkcg_policy[i]->pd_free_fn(blkg->pd[i]);
- blk_put_queue(disk->queue);
+ put_disk(blkg->disk);
out_free_iostat:
free_percpu(blkg->iostat_cpu);
out_exit_refcnt:
@@ -461,7 +462,7 @@ static void blkg_destroy(struct blkcg_gq *blkg)
struct blkcg *blkcg = blkg->blkcg;
int i;
- lockdep_assert_held(&blkg->q->queue_lock);
+ lockdep_assert_held(&blkg->disk->queue->queue_lock);
lockdep_assert_held(&blkcg->lock);
/*
@@ -485,7 +486,7 @@ static void blkg_destroy(struct blkcg_gq *blkg)
blkg->online = false;
- radix_tree_delete(&blkcg->blkg_tree, blkg->q->id);
+ radix_tree_delete(&blkcg->blkg_tree, blkg->disk->queue->id);
hlist_del_init_rcu(&blkg->blkcg_node);
/*
@@ -572,9 +573,7 @@ static int blkcg_reset_stats(struct cgroup_subsys_state *css,
const char *blkg_dev_name(struct blkcg_gq *blkg)
{
- if (!blkg->q->disk)
- return NULL;
- return bdi_dev_name(blkg->q->disk->bdi);
+ return bdi_dev_name(blkg->disk->bdi);
}
/**
@@ -606,10 +605,10 @@ void blkcg_print_blkgs(struct seq_file *sf, struct blkcg *blkcg,
rcu_read_lock();
hlist_for_each_entry_rcu(blkg, &blkcg->blkg_list, blkcg_node) {
- spin_lock_irq(&blkg->q->queue_lock);
- if (blkcg_policy_enabled(blkg->q, pol))
+ spin_lock_irq(&blkg->disk->queue->queue_lock);
+ if (blkcg_policy_enabled(blkg->disk->queue, pol))
total += prfill(sf, blkg->pd[pol->plid], data);
- spin_unlock_irq(&blkg->q->queue_lock);
+ spin_unlock_irq(&blkg->disk->queue->queue_lock);
}
rcu_read_unlock();
@@ -1033,9 +1032,9 @@ static int blkcg_print_stat(struct seq_file *sf, void *v)
rcu_read_lock();
hlist_for_each_entry_rcu(blkg, &blkcg->blkg_list, blkcg_node) {
- spin_lock_irq(&blkg->q->queue_lock);
+ spin_lock_irq(&blkg->disk->queue->queue_lock);
blkcg_print_one_stat(blkg, sf);
- spin_unlock_irq(&blkg->q->queue_lock);
+ spin_unlock_irq(&blkg->disk->queue->queue_lock);
}
rcu_read_unlock();
return 0;
@@ -1105,7 +1104,7 @@ static void blkcg_destroy_blkgs(struct blkcg *blkcg)
while (!hlist_empty(&blkcg->blkg_list)) {
struct blkcg_gq *blkg = hlist_entry(blkcg->blkg_list.first,
struct blkcg_gq, blkcg_node);
- struct request_queue *q = blkg->q;
+ struct request_queue *q = blkg->disk->queue;
if (need_resched() || !spin_trylock(&q->queue_lock)) {
/*