extern nat mutlist_MUTVARS, mutlist_MUTARRS, mutlist_MVARS, mutlist_OTHERS;
#endif
-#ifdef THREADED_RTS
-extern SpinLock gc_alloc_block_sync;
-#endif
-
#if defined(PROF_SPIN) && defined(THREADED_RTS)
-extern StgWord64 whitehole_spin;
+extern StgWord64 evac_collision;
#endif
void gcWorkerThread (Capability *cap);