diff -r bd0a95bec96b -r 9042ffe5b7fe src/hotspot/share/runtime/mutexLocker.cpp
--- a/src/hotspot/share/runtime/mutexLocker.cpp	Fri May 04 09:29:14 2018 +0200
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Fri May 04 11:41:35 2018 +0200
@@ -209,9 +209,7 @@
   }
   def(ParGCRareEvent_lock          , PaddedMutex  , leaf     ,   true,  Monitor::_safepoint_check_sometimes);
   def(DerivedPointerTableGC_lock   , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_never);
-#ifdef INCLUDE_ALL_GCS
   def(CGCPhaseManager_lock         , PaddedMonitor, leaf,        false, Monitor::_safepoint_check_sometimes);
-#endif
   def(CodeCache_lock               , PaddedMutex  , special,     true,  Monitor::_safepoint_check_never);
   def(RawMonitor_lock              , PaddedMutex  , special,     true,  Monitor::_safepoint_check_never);
   def(OopMapCacheAlloc_lock        , PaddedMutex  , leaf,        true,  Monitor::_safepoint_check_always);     // used for oop_map_cache allocation.