diff options
| -rw-r--r-- | block/blk-core.c | 2 | ||||
| -rw-r--r-- | block/blk-sysfs.c | 1 | ||||
| -rw-r--r-- | include/linux/backing-dev.h | 6 | ||||
| -rw-r--r-- | mm/backing-dev.c | 12 |
4 files changed, 18 insertions, 3 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 2eb722d48773..18e92a6645e2 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -576,7 +576,7 @@ void blk_cleanup_queue(struct request_queue *q) q->queue_lock = &q->__queue_lock; spin_unlock_irq(lock); - bdi_destroy(&q->backing_dev_info); + bdi_unregister(&q->backing_dev_info); /* @q is and will stay empty, shutdown and put */ blk_put_queue(q); diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 3e44a9da2a13..07b42f5ad797 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -540,6 +540,7 @@ static void blk_release_queue(struct kobject *kobj) struct request_queue *q = container_of(kobj, struct request_queue, kobj); + bdi_exit(&q->backing_dev_info); blkcg_exit_queue(q); if (q->elevator) { diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 78677e5a65bf..c85f74946a8b 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -19,13 +19,17 @@ #include <linux/slab.h> int __must_check bdi_init(struct backing_dev_info *bdi); -void bdi_destroy(struct backing_dev_info *bdi); +void bdi_exit(struct backing_dev_info *bdi); __printf(3, 4) int bdi_register(struct backing_dev_info *bdi, struct device *parent, const char *fmt, ...); int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev); +void bdi_unregister(struct backing_dev_info *bdi); + int __must_check bdi_setup_and_register(struct backing_dev_info *, char *); +void bdi_destroy(struct backing_dev_info *bdi); + void wb_start_writeback(struct bdi_writeback *wb, long nr_pages, bool range_cyclic, enum wb_reason reason); void wb_start_background_writeback(struct bdi_writeback *wb); diff --git a/mm/backing-dev.c b/mm/backing-dev.c index e92d77937fd3..9e841399041a 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -835,7 +835,7 @@ static void bdi_remove_from_list(struct backing_dev_info *bdi) synchronize_rcu_expedited(); } -void bdi_destroy(struct backing_dev_info *bdi) +void bdi_unregister(struct backing_dev_info *bdi) { /* make sure nobody finds us on the bdi_list anymore */ bdi_remove_from_list(bdi); @@ -847,9 +847,19 @@ void bdi_destroy(struct backing_dev_info *bdi) device_unregister(bdi->dev); bdi->dev = NULL; } +} +void bdi_exit(struct backing_dev_info *bdi) +{ + WARN_ON_ONCE(bdi->dev); wb_exit(&bdi->wb); } + +void bdi_destroy(struct backing_dev_info *bdi) +{ + bdi_unregister(bdi); + bdi_exit(bdi); +} EXPORT_SYMBOL(bdi_destroy); /* |