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SubjectRe: [patch 4/21] fix ARCH_HAS_PREFETCH
Rogier Wolff wrote:
>>
>>Bullsh*t. It can legitimately transform it into:
>>
>> i = N;
>
>
> Right! But people are confusing "practise", "published interface", and
> "spec" again.
>
> Published interface in this case is that gcc will not optimize an empty
> loop away, as it is often used to generate a timing loop.
>

Yes. This is a gcc-specific wart, a bad idea from the start, and
apparently one which has caught up with them to the point that they've
had to abandon it.

-hpa


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