726 			 void *holder)  in bd_may_claim()  argument
728 	if (bdev->bd_holder == holder)  in bd_may_claim()
762 			       struct block_device *whole, void *holder)  in bd_prepare_to_claim()  argument
766 	if (!bd_may_claim(bdev, whole, holder))  in bd_prepare_to_claim()
810 					      void *holder)  in bd_start_claiming()  argument
847 	err = bd_prepare_to_claim(bdev, whole, holder);  in bd_start_claiming()
849 		whole->bd_claiming = holder;  in bd_start_claiming()
869 	struct bd_holder_disk *holder;  in bd_find_holder_disk()  local
871 	list_for_each_entry(holder, &bdev->bd_holder_disks, list)  in bd_find_holder_disk()
872 		if (holder->disk == disk)  in bd_find_holder_disk()
873 			return holder;  in bd_find_holder_disk()
917 	struct bd_holder_disk *holder;  in bd_link_disk_holder()  local
928 	holder = bd_find_holder_disk(bdev, disk);  in bd_link_disk_holder()
929 	if (holder) {  in bd_link_disk_holder()
930 		holder->refcnt++;  in bd_link_disk_holder()
934 	holder = kzalloc(sizeof(*holder), GFP_KERNEL);  in bd_link_disk_holder()
935 	if (!holder) {  in bd_link_disk_holder()
940 	INIT_LIST_HEAD(&holder->list);  in bd_link_disk_holder()
941 	holder->disk = disk;  in bd_link_disk_holder()
942 	holder->refcnt = 1;  in bd_link_disk_holder()
957 	list_add(&holder->list, &bdev->bd_holder_disks);  in bd_link_disk_holder()
963 	kfree(holder);  in bd_link_disk_holder()
982 	struct bd_holder_disk *holder;  in bd_unlink_disk_holder()  local
986 	holder = bd_find_holder_disk(bdev, disk);  in bd_unlink_disk_holder()
988 	if (!WARN_ON_ONCE(holder == NULL) && !--holder->refcnt) {  in bd_unlink_disk_holder()
993 		list_del_init(&holder->list);  in bd_unlink_disk_holder()
994 		kfree(holder);  in bd_unlink_disk_holder()
1309 int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder)  in blkdev_get()  argument
1314 	WARN_ON_ONCE((mode & FMODE_EXCL) && !holder);  in blkdev_get()
1316 	if ((mode & FMODE_EXCL) && holder) {  in blkdev_get()
1317 		whole = bd_start_claiming(bdev, holder);  in blkdev_get()
1334 			BUG_ON(!bd_may_claim(bdev, whole, holder));  in blkdev_get()
1344 			bdev->bd_holder = holder;  in blkdev_get()
1348 		BUG_ON(whole->bd_claiming != holder);  in blkdev_get()
1393 					void *holder)  in blkdev_get_by_path()  argument
1402 	err = blkdev_get(bdev, mode, holder);  in blkdev_get_by_path()
1437 struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder)  in blkdev_get_by_dev()  argument
1446 	err = blkdev_get(bdev, mode, holder);  in blkdev_get_by_dev()