+void scavenge_mutable_list (bdescr *bd, generation *gen);
+void scavenge_capability_mut_lists (Capability *cap);
+
+#ifdef THREADED_RTS
+void scavenge_loop1 (void);
+void scavenge_mutable_list1 (bdescr *bd, generation *gen);
+void scavenge_capability_mut_Lists1 (Capability *cap);
+#endif