/* Remove bdi from bdi_list, and ensure that it is no longer visible  */
static void bdi_remove_from_list(struct backing_dev_info *bdi)
/* Remove bdi from bdi_list, and ensure that it is no longer visible  */
static void bdi_remove_from_list(struct backing_dev_info *bdi)
{
	spin_lock_bh(&bdi_lock);
	list_del_rcu(&bdi->bdi_list);
	spin_unlock_bh(&bdi_lock);
	synchronize_rcu();
}