src/hotspot/share/gc/z/zPage.inline.hpp

*** 253,263 ****
      if (new_top > end()) {
        // Not enough space left
        return 0;
      }
  
!     const uintptr_t prev_top = Atomic::cmpxchg(new_top, &_top, addr);
      if (prev_top == addr) {
        // Success
        return ZAddress::good(addr);
      }
  
--- 253,263 ----
      if (new_top > end()) {
        // Not enough space left
        return 0;
      }
  
!     const uintptr_t prev_top = Atomic::cmpxchg(&_top, addr, new_top);
      if (prev_top == addr) {
        // Success
        return ZAddress::good(addr);
      }
  
*** 297,307 ****
      if (new_top != offset) {
        // Failed to undo allocation, not the last allocated object
        return false;
      }
  
!     const uintptr_t prev_top = Atomic::cmpxchg(new_top, &_top, old_top);
      if (prev_top == old_top) {
        // Success
        return true;
      }
  
--- 297,307 ----
      if (new_top != offset) {
        // Failed to undo allocation, not the last allocated object
        return false;
      }
  
!     const uintptr_t prev_top = Atomic::cmpxchg(&_top, old_top, new_top);
      if (prev_top == old_top) {
        // Success
        return true;
      }