i_dlstat_join_lists
head = i_dlstat_join_lists(local_stats, bcast_stats);
head = i_dlstat_join_lists(head, defunctlane_stats);
head = i_dlstat_join_lists(head, lane_stats);
head = i_dlstat_join_lists(bcast_stats, defunctlane_stats);
head = i_dlstat_join_lists(head, lane_stats);