424 					struct dm_snapshot **snap_src,  in __find_snapshots_sharing_cow()  argument
448 			if (snap_src)  in __find_snapshots_sharing_cow()
449 				*snap_src = s;  in __find_snapshots_sharing_cow()
466 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in __validate_exception_handover()  local
470 	if ((__find_snapshots_sharing_cow(snap, &snap_src, &snap_dest,  in __validate_exception_handover()
482 	if (!snap_src)  in __validate_exception_handover()
499 	if (!snap_src->store->type->prepare_merge ||  in __validate_exception_handover()
500 	    !snap_src->store->type->commit_merge) {  in __validate_exception_handover()
1297 static void __handover_exceptions(struct dm_snapshot *snap_src,  in __handover_exceptions()  argument
1309 	snap_dest->complete = snap_src->complete;  in __handover_exceptions()
1310 	snap_src->complete = u.table_swap;  in __handover_exceptions()
1313 	snap_dest->store = snap_src->store;  in __handover_exceptions()
1315 	snap_src->store = u.store_swap;  in __handover_exceptions()
1318 	snap_src->store->snap = snap_src;  in __handover_exceptions()
1321 	snap_dest->valid = snap_src->valid;  in __handover_exceptions()
1322 	snap_dest->snapshot_overflowed = snap_src->snapshot_overflowed;  in __handover_exceptions()
1327 	snap_src->valid = 0;  in __handover_exceptions()
1336 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_dtr()  local
1340 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_dtr()
1341 	if (snap_src && snap_dest && (s == snap_src)) {  in snapshot_dtr()
1878 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL;  in snapshot_preresume()  local
1881 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_preresume()
1882 	if (snap_src && snap_dest) {  in snapshot_preresume()
1883 		down_read(&snap_src->lock);  in snapshot_preresume()
1884 		if (s == snap_src) {  in snapshot_preresume()
1888 		} else if (!dm_suspended(snap_src->ti)) {  in snapshot_preresume()
1893 		up_read(&snap_src->lock);  in snapshot_preresume()
1903 	struct dm_snapshot *snap_src = NULL, *snap_dest = NULL, *snap_merging = NULL;  in snapshot_resume()  local
1937 	(void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL);  in snapshot_resume()
1938 	if (snap_src && snap_dest) {  in snapshot_resume()
1939 		down_write(&snap_src->lock);  in snapshot_resume()
1941 		__handover_exceptions(snap_src, snap_dest);  in snapshot_resume()
1943 		up_write(&snap_src->lock);  in snapshot_resume()