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

*** 119,129 ****
    uint32_t version = 0;
  
    for (;;) {
      decode_versioned_pointer(vstack, stack->next_addr(), &version);
      T* const new_vstack = encode_versioned_pointer(stack, version + 1);
!     T* const prev_vstack = Atomic::cmpxchg(new_vstack, &_head, vstack);
      if (prev_vstack == vstack) {
        // Success
        break;
      }
  
--- 119,129 ----
    uint32_t version = 0;
  
    for (;;) {
      decode_versioned_pointer(vstack, stack->next_addr(), &version);
      T* const new_vstack = encode_versioned_pointer(stack, version + 1);
!     T* const prev_vstack = Atomic::cmpxchg(&_head, vstack, new_vstack);
      if (prev_vstack == vstack) {
        // Success
        break;
      }
  
*** 143,153 ****
      if (stack == NULL) {
        return NULL;
      }
  
      T* const new_vstack = encode_versioned_pointer(stack->next(), version + 1);
!     T* const prev_vstack = Atomic::cmpxchg(new_vstack, &_head, vstack);
      if (prev_vstack == vstack) {
        // Success
        return stack;
      }
  
--- 143,153 ----
      if (stack == NULL) {
        return NULL;
      }
  
      T* const new_vstack = encode_versioned_pointer(stack->next(), version + 1);
!     T* const prev_vstack = Atomic::cmpxchg(&_head, vstack, new_vstack);
      if (prev_vstack == vstack) {
        // Success
        return stack;
      }