src/hotspot/share/gc/g1/g1ConcurrentMark.cpp

*** 1904,1914 ****
      // Above heap_region_containing may return NULL as we always scan claim
      // until the end of the heap. In this case, just jump to the next region.
      HeapWord* end = curr_region != NULL ? curr_region->end() : finger + HeapRegion::GrainWords;
  
      // Is the gap between reading the finger and doing the CAS too long?
!     HeapWord* res = Atomic::cmpxchg(end, &_finger, finger);
      if (res == finger && curr_region != NULL) {
        // we succeeded
        HeapWord*   bottom        = curr_region->bottom();
        HeapWord*   limit         = curr_region->next_top_at_mark_start();
  
--- 1904,1914 ----
      // Above heap_region_containing may return NULL as we always scan claim
      // until the end of the heap. In this case, just jump to the next region.
      HeapWord* end = curr_region != NULL ? curr_region->end() : finger + HeapRegion::GrainWords;
  
      // Is the gap between reading the finger and doing the CAS too long?
!     HeapWord* res = Atomic::cmpxchg(&_finger, finger, end);
      if (res == finger && curr_region != NULL) {
        // we succeeded
        HeapWord*   bottom        = curr_region->bottom();
        HeapWord*   limit         = curr_region->next_top_at_mark_start();