Re: x86 setup rewrite tree ready for flamage^W review

["H. Peter Anvin" <hpa@zytor.com>]

Eric W. Biederman wrote:
> 
> Even on 386 and 486 class cpus?
> 

Yes, even on 386 and 486 class CPUs.  I have personally tested this on
machines as old as the original "double sigma" 386-16.

> To some extent if the rules don't change it makes sense for them to
> copy the information from one generation to the next of the architecture.
> Even if the current cpus don't really care.
> 
> I guess I just don't see the sense in taking chances if we don't have
> to, and I don't see any real advantage of doing a data segment reload
> before the jump.

It makes the code cleaner -- more debuggable -- by introducing clean
separation between 16- and 32-bit code.

	-hpa
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