src/hotspot/share/utilities/singleWriterSynchronizer.cpp

*** 62,72 ****
    // operations until this change of _enter succeeds.
    uint old;
    do {
      old = value;
      *new_ptr = ++value;
!     value = Atomic::cmpxchg(value, &_enter, old);
    } while (old != value);
    // Critical sections entered before we changed the polarity will use
    // the old exit counter.  Critical sections entered after the change
    // will use the new exit counter.
    volatile uint* old_ptr = &_exit[old & 1];
--- 62,72 ----
    // operations until this change of _enter succeeds.
    uint old;
    do {
      old = value;
      *new_ptr = ++value;
!     value = Atomic::cmpxchg(&_enter, old, value);
    } while (old != value);
    // Critical sections entered before we changed the polarity will use
    // the old exit counter.  Critical sections entered after the change
    // will use the new exit counter.
    volatile uint* old_ptr = &_exit[old & 1];