+ /*
+ * btrfs_show_devname() is using the device_list_mutex,
+ * sometimes call to blkdev_put() leads vfs calling
+ * into this func. So do put outside of device_list_mutex,
+ * as of now.
+ */
+ while (!list_empty(&pending_put)) {
+ device = list_first_entry(&pending_put,
+ struct btrfs_device, dev_list);
+ list_del(&device->dev_list);
+ btrfs_close_bdev(device);
+ call_rcu(&device->rcu, free_device);
+ }
+