/* Will return NULL if the request queue cannot be located.  */
struct backing_dev_info* blk_get_backing_dev_info(struct block_device *bdev)
/* Will return NULL if the request queue cannot be located.  */
struct backing_dev_info* blk_get_backing_dev_info(struct block_device *bdev)
{
	struct backing_dev_info *ret = NULL;
	struct request_queue *q = bdev_get_queue(bdev);
	if (q)
		ret = &q->backing_dev_info;
	return ret;
}