diff options
Diffstat (limited to 'block/blk-cgroup.c')
| -rw-r--r-- | block/blk-cgroup.c | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 157456632124..981ebe003b1c 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -118,6 +118,7 @@ static void blkg_free_workfn(struct work_struct *work) { struct blkcg_gq *blkg = container_of(work, struct blkcg_gq, free_work); + struct request_queue *q = blkg->q; int i; /* @@ -127,16 +128,16 @@ static void blkg_free_workfn(struct work_struct *work) * blkcg_mutex is used to synchronize blkg_free_workfn() and * blkcg_deactivate_policy(). */ - mutex_lock(&blkg->disk->queue->blkcg_mutex); + mutex_lock(&q->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(&blkg->disk->queue->blkcg_mutex); + mutex_unlock(&q->blkcg_mutex); - put_disk(blkg->disk); + blk_put_queue(q); free_percpu(blkg->iostat_cpu); percpu_ref_exit(&blkg->refcnt); kfree(blkg); @@ -263,12 +264,10 @@ 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 (test_bit(GD_DEAD, &disk->state)) + if (!blk_get_queue(disk->queue)) 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); @@ -304,7 +303,7 @@ out_free_pds: while (--i >= 0) if (blkg->pd[i]) blkcg_policy[i]->pd_free_fn(blkg->pd[i]); - put_disk(blkg->disk); + blk_put_queue(disk->queue); out_free_iostat: free_percpu(blkg->iostat_cpu); out_exit_refcnt: @@ -476,7 +475,7 @@ static void blkg_destroy(struct blkcg_gq *blkg) struct blkcg *blkcg = blkg->blkcg; int i; - lockdep_assert_held(&blkg->disk->queue->queue_lock); + lockdep_assert_held(&blkg->q->queue_lock); lockdep_assert_held(&blkcg->lock); /* @@ -500,7 +499,7 @@ static void blkg_destroy(struct blkcg_gq *blkg) blkg->online = false; - radix_tree_delete(&blkcg->blkg_tree, blkg->disk->queue->id); + radix_tree_delete(&blkcg->blkg_tree, blkg->q->id); hlist_del_init_rcu(&blkg->blkcg_node); /* @@ -587,7 +586,9 @@ static int blkcg_reset_stats(struct cgroup_subsys_state *css, const char *blkg_dev_name(struct blkcg_gq *blkg) { - return bdi_dev_name(blkg->disk->bdi); + if (!blkg->q->disk) + return NULL; + return bdi_dev_name(blkg->q->disk->bdi); } /** @@ -619,10 +620,10 @@ 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->disk->queue->queue_lock); - if (blkcg_policy_enabled(blkg->disk->queue, pol)) + spin_lock_irq(&blkg->q->queue_lock); + if (blkcg_policy_enabled(blkg->q, pol)) total += prfill(sf, blkg->pd[pol->plid], data); - spin_unlock_irq(&blkg->disk->queue->queue_lock); + spin_unlock_irq(&blkg->q->queue_lock); } rcu_read_unlock(); @@ -1046,9 +1047,9 @@ 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->disk->queue->queue_lock); + spin_lock_irq(&blkg->q->queue_lock); blkcg_print_one_stat(blkg, sf); - spin_unlock_irq(&blkg->disk->queue->queue_lock); + spin_unlock_irq(&blkg->q->queue_lock); } rcu_read_unlock(); return 0; @@ -1118,7 +1119,7 @@ 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->disk->queue; + struct request_queue *q = blkg->q; if (need_resched() || !spin_trylock(&q->queue_lock)) { /* |