--- old/src/hotspot/share/gc/shared/taskqueue.inline.hpp	2019-11-21 11:55:09.724944912 +0100
+++ new/src/hotspot/share/gc/shared/taskqueue.inline.hpp	2019-11-21 11:55:09.472940650 +0100
@@ -321,7 +321,7 @@
 
 template <unsigned int N, MEMFLAGS F>
 inline typename TaskQueueSuper<N, F>::Age TaskQueueSuper<N, F>::Age::cmpxchg(const Age new_age, const Age old_age) volatile {
-  return Atomic::cmpxchg(new_age._data, &_data, old_age._data);
+  return Atomic::cmpxchg(&_data, old_age._data, new_age._data);
 }
 
 template<class E, MEMFLAGS F, unsigned int N>