diff a/src/hotspot/share/gc/z/zMarkStack.hpp b/src/hotspot/share/gc/z/zMarkStack.hpp
--- a/src/hotspot/share/gc/z/zMarkStack.hpp
+++ b/src/hotspot/share/gc/z/zMarkStack.hpp
@@ -60,12 +60,12 @@
 public:
   ZStackList();
 
   bool is_empty() const;
 
-  void push_atomic(T* stack);
-  T* pop_atomic();
+  void push(T* stack);
+  T* pop();
 };
 
 typedef ZStack<ZMarkStackEntry, ZMarkStackSlots>     ZMarkStack;
 typedef ZStackList<ZMarkStack>                       ZMarkStackList;
 typedef ZStack<ZMarkStack*, ZMarkStackMagazineSlots> ZMarkStackMagazine;