Re: [patch 4/21] fix ARCH_HAS_PREFETCH

[H. Peter Anvin]

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