--- old/src/hotspot/share/gc/cms/cmsHeap.cpp	2019-09-07 21:51:30.000000000 +0200
+++ new/src/hotspot/share/gc/cms/cmsHeap.cpp	2019-09-07 21:51:30.000000000 +0200
@@ -240,13 +240,11 @@
 }
 
 void CMSHeap::gc_prologue(bool full) {
-  always_do_update_barrier = false;
   GenCollectedHeap::gc_prologue(full);
 };
 
 void CMSHeap::gc_epilogue(bool full) {
   GenCollectedHeap::gc_epilogue(full);
-  always_do_update_barrier = true;
 };
 
 GrowableArray<GCMemoryManager*> CMSHeap::memory_managers() {