Re: [patch 4/21] fix ARCH_HAS_PREFETCH

[Linus Torvalds]

On Sun, 11 Aug 2002, Andrew Morton wrote:
> 
> It's actually a special-case inside the compiler to not optimise
> away such constructs.

I thought that special case was removed long ago, because it is untenable 
in C++ etc (where such empty loops happen due to various abstraction 
issues, and not optimizing them away is just silly).

But testing shows that you're right at least for 2.95 and 2.96. Argh

		Linus