1037 static bool bd_may_claim(struct block_device *bdev, struct block_device *whole,  in bd_may_claim()  argument
1044 	else if (whole == bdev)  in bd_may_claim()
1047 	else if (whole->bd_holder == bd_may_claim)  in bd_may_claim()
1049 	else if (whole->bd_holder != NULL)  in bd_may_claim()
1074 			       struct block_device *whole, void *holder)  in bd_prepare_to_claim()  argument
1078 	if (!bd_may_claim(bdev, whole, holder))  in bd_prepare_to_claim()
1082 	if (whole->bd_claiming) {  in bd_prepare_to_claim()
1083 		wait_queue_head_t *wq = bit_waitqueue(&whole->bd_claiming, 0);  in bd_prepare_to_claim()
1145 	struct block_device *whole;  in bd_start_claiming()  local
1167 		whole = bdget_disk(disk, 0);  in bd_start_claiming()
1169 		whole = bdgrab(bdev);  in bd_start_claiming()
1172 	if (!whole)  in bd_start_claiming()
1178 	err = bd_prepare_to_claim(bdev, whole, holder);  in bd_start_claiming()
1180 		whole->bd_claiming = holder;  in bd_start_claiming()
1182 		return whole;  in bd_start_claiming()
1185 		bdput(whole);  in bd_start_claiming()
1191 static void bd_clear_claiming(struct block_device *whole, void *holder)  in bd_clear_claiming()  argument
1195 	BUG_ON(whole->bd_claiming != holder);  in bd_clear_claiming()
1196 	whole->bd_claiming = NULL;  in bd_clear_claiming()
1197 	wake_up_bit(&whole->bd_claiming, 0);  in bd_clear_claiming()
1209 void bd_finish_claiming(struct block_device *bdev, struct block_device *whole,  in bd_finish_claiming()  argument
1213 	BUG_ON(!bd_may_claim(bdev, whole, holder));  in bd_finish_claiming()
1218 	whole->bd_holders++;  in bd_finish_claiming()
1219 	whole->bd_holder = bd_may_claim;  in bd_finish_claiming()
1222 	bd_clear_claiming(whole, holder);  in bd_finish_claiming()
1237 void bd_abort_claiming(struct block_device *bdev, struct block_device *whole,  in bd_abort_claiming()  argument
1241 	bd_clear_claiming(whole, holder);  in bd_abort_claiming()
1607 			struct block_device *whole;  in __blkdev_get()  local
1608 			whole = bdget_disk(disk, 0);  in __blkdev_get()
1610 			if (!whole)  in __blkdev_get()
1613 			ret = __blkdev_get(whole, mode, 1);  in __blkdev_get()
1616 			bdev->bd_contains = whole;  in __blkdev_get()
1694 	struct block_device *whole = NULL;  in blkdev_get()  local
1700 		whole = bd_start_claiming(bdev, holder);  in blkdev_get()
1701 		if (IS_ERR(whole)) {  in blkdev_get()
1703 			return PTR_ERR(whole);  in blkdev_get()
1709 	if (whole) {  in blkdev_get()
1710 		struct gendisk *disk = whole->bd_disk;  in blkdev_get()
1715 			bd_finish_claiming(bdev, whole, holder);  in blkdev_get()
1717 			bd_abort_claiming(bdev, whole, holder);  in blkdev_get()
1732 		bdput(whole);  in blkdev_get()