452 					struct dm_snapshot **snap_dest,  in __find_snapshots_sharing_cow()  argument
477 		} else if (snap_dest)  in __find_snapshots_sharing_cow()
478 			*snap_dest = s;  in __find_snapshots_sharing_cow()
493 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in __validate_exception_handover()  local
497 	if ((__find_snapshots_sharing_cow(snap, &snap_src, &snap_dest,  in __validate_exception_handover()
499 	    snap_dest) {  in __validate_exception_handover()
1427 				  struct dm_snapshot *snap_dest)  in __handover_exceptions()  argument
1437 	u.table_swap = snap_dest->complete;  in __handover_exceptions()
1438 	snap_dest->complete = snap_src->complete;  in __handover_exceptions()
1441 	u.store_swap = snap_dest->store;  in __handover_exceptions()
1442 	snap_dest->store = snap_src->store;  in __handover_exceptions()
1443 	snap_dest->store->userspace_supports_overflow = u.store_swap->userspace_supports_overflow;  in __handover_exceptions()
1446 	snap_dest->store->snap = snap_dest;  in __handover_exceptions()
1449 	snap_dest->ti->max_io_len = snap_dest->store->chunk_size;  in __handover_exceptions()
1450 	snap_dest->valid = snap_src->valid;  in __handover_exceptions()
1451 	snap_dest->snapshot_overflowed = snap_src->snapshot_overflowed;  in __handover_exceptions()
1465 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_dtr()  local
1469 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_dtr()
1470 	if (snap_src && snap_dest && (s == snap_src)) {  in snapshot_dtr()
1471 		down_write(&snap_dest->lock);  in snapshot_dtr()
1472 		snap_dest->valid = 0;  in snapshot_dtr()
1473 		up_write(&snap_dest->lock);  in snapshot_dtr()
2195 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_preresume()  local
2198 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_preresume()
2199 	if (snap_src && snap_dest) {  in snapshot_preresume()
2218 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL, *snap_merging = NULL;  in snapshot_resume()  local
2252 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_resume()
2253 	if (snap_src && snap_dest) {  in snapshot_resume()
2255 		down_write_nested(&snap_dest->lock, SINGLE_DEPTH_NESTING);  in snapshot_resume()
2256 		__handover_exceptions(snap_src, snap_dest);  in snapshot_resume()
2257 		up_write(&snap_dest->lock);  in snapshot_resume()
2394 		struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_io_hints()  local
2398 		(void) __find_snapshots_sharing_cow(snap, &snap_src, &snap_dest, NULL);  in snapshot_io_hints()
2399 		if (snap_src && snap_dest)  in snapshot_io_hints()