1003 static bool bd_may_claim(struct block_device *bdev, struct block_device *whole,  in bd_may_claim()  argument
1010 	else if (whole == bdev)  in bd_may_claim()
1013 	else if (whole->bd_holder == bd_may_claim)  in bd_may_claim()
1015 	else if (whole->bd_holder != NULL)  in bd_may_claim()
1040 			       struct block_device *whole, void *holder)  in bd_prepare_to_claim()  argument
1044 	if (!bd_may_claim(bdev, whole, holder))  in bd_prepare_to_claim()
1048 	if (whole->bd_claiming) {  in bd_prepare_to_claim()
1049 		wait_queue_head_t *wq = bit_waitqueue(&whole->bd_claiming, 0);  in bd_prepare_to_claim()
1112 	struct block_device *whole;  in bd_start_claiming()  local
1134 		whole = bdget_disk(disk, 0);  in bd_start_claiming()
1136 		whole = bdgrab(bdev);  in bd_start_claiming()
1139 	if (!whole)  in bd_start_claiming()
1145 	err = bd_prepare_to_claim(bdev, whole, holder);  in bd_start_claiming()
1147 		whole->bd_claiming = holder;  in bd_start_claiming()
1149 		return whole;  in bd_start_claiming()
1152 		bdput(whole);  in bd_start_claiming()
1518 			struct block_device *whole;  in __blkdev_get()  local
1519 			whole = bdget_disk(disk, 0);  in __blkdev_get()
1521 			if (!whole)  in __blkdev_get()
1524 			ret = __blkdev_get(whole, mode, 1);  in __blkdev_get()
1527 			bdev->bd_contains = whole;  in __blkdev_get()
1604 	struct block_device *whole = NULL;  in blkdev_get()  local
1610 		whole = bd_start_claiming(bdev, holder);  in blkdev_get()
1611 		if (IS_ERR(whole)) {  in blkdev_get()
1613 			return PTR_ERR(whole);  in blkdev_get()
1619 	if (whole) {  in blkdev_get()
1620 		struct gendisk *disk = whole->bd_disk;  in blkdev_get()
1627 			BUG_ON(!bd_may_claim(bdev, whole, holder));  in blkdev_get()
1634 			whole->bd_holders++;  in blkdev_get()
1635 			whole->bd_holder = bd_may_claim;  in blkdev_get()
1641 		BUG_ON(whole->bd_claiming != holder);  in blkdev_get()
1642 		whole->bd_claiming = NULL;  in blkdev_get()
1643 		wake_up_bit(&whole->bd_claiming, 0);  in blkdev_get()
1661 		bdput(whole);  in blkdev_get()