src/hotspot/share/gc/z/zMarkStackAllocator.cpp

*** 68,78 ****
      if (new_top > end) {
        // Not enough space left
        return 0;
      }
  
!     const uintptr_t prev_top = Atomic::cmpxchg(new_top, &_top, top);
      if (prev_top == top) {
        // Success
        return top;
      }
  
--- 68,78 ----
      if (new_top > end) {
        // Not enough space left
        return 0;
      }
  
!     const uintptr_t prev_top = Atomic::cmpxchg(&_top, top, new_top);
      if (prev_top == top) {
        // Success
        return top;
      }