/* Description: Merges queue limits for a top device and a block_device. Returns 0 if alignment didn't change. Returns -1 if adding the bottom device caused misalignment.  */
int bdev_stack_limits(struct queue_limits *t, struct block_device *bdev, sector_t start)
/* Description: Merges queue limits for a top device and a block_device. Returns 0 if alignment didn't change. Returns -1 if adding the bottom device caused misalignment.  */
int bdev_stack_limits(struct queue_limits *t, struct block_device *bdev, sector_t start)
{
	struct request_queue *bq = bdev_get_queue(bdev);
	start += get_start_sect(bdev);
	return blk_stack_limits(t, &bq->limits, start << 9);
}