417 					struct dm_snapshot **snap_src,  in __find_snapshots_sharing_cow()  argument
441 			if (snap_src)  in __find_snapshots_sharing_cow()
442 				*snap_src = s;  in __find_snapshots_sharing_cow()
459 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in __validate_exception_handover()  local
463 	if ((__find_snapshots_sharing_cow(snap, &snap_src, &snap_dest,  in __validate_exception_handover()
475 	if (!snap_src)  in __validate_exception_handover()
492 	if (!snap_src->store->type->prepare_merge ||  in __validate_exception_handover()
493 	    !snap_src->store->type->commit_merge) {  in __validate_exception_handover()
1280 static void __handover_exceptions(struct dm_snapshot *snap_src,  in __handover_exceptions()  argument
1292 	snap_dest->complete = snap_src->complete;  in __handover_exceptions()
1293 	snap_src->complete = u.table_swap;  in __handover_exceptions()
1296 	snap_dest->store = snap_src->store;  in __handover_exceptions()
1297 	snap_src->store = u.store_swap;  in __handover_exceptions()
1300 	snap_src->store->snap = snap_src;  in __handover_exceptions()
1303 	snap_dest->valid = snap_src->valid;  in __handover_exceptions()
1308 	snap_src->valid = 0;  in __handover_exceptions()
1317 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_dtr()  local
1321 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_dtr()
1322 	if (snap_src && snap_dest && (s == snap_src)) {  in snapshot_dtr()
1856 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_preresume()  local
1859 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_preresume()
1860 	if (snap_src && snap_dest) {  in snapshot_preresume()
1861 		down_read(&snap_src->lock);  in snapshot_preresume()
1862 		if (s == snap_src) {  in snapshot_preresume()
1866 		} else if (!dm_suspended(snap_src->ti)) {  in snapshot_preresume()
1871 		up_read(&snap_src->lock);  in snapshot_preresume()
1881 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL, *snap_merging = NULL;  in snapshot_resume()  local
1915 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_resume()
1916 	if (snap_src && snap_dest) {  in snapshot_resume()
1917 		down_write(&snap_src->lock);  in snapshot_resume()
1919 		__handover_exceptions(snap_src, snap_dest);  in snapshot_resume()
1921 		up_write(&snap_src->lock);  in snapshot_resume()