[Ada] Fix to 64-bit atomic operation failures on ppc-linux

[Andrew MacLeod]

On 07/17/2012 11:56 AM, Richard Henderson wrote:
> On 07/17/2012 04:57 AM, Andrew MacLeod wrote:
>> What is the nature of the atomic failures using the
>> __atomic_compare_exchange built-in?   Does it have anything to do
>> with the expected value being returned by pointer?
> It's a rue.  He never was using __atomic_compare_exchange;
> the "Atomic_*" was simply the Ada symbol name.
>
>
>

Ah,  I was just disturbed by the apparent switch from 'atomic' to 
'sync'... which is the wrong direction :-)

Andrew