Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80I/O delay override.

[H. Peter Anvin]

Christer Weinigel wrote:
> On Wed, 09 Jan 2008 10:18:11 -0800
> "H. Peter Anvin" <hpa@xxxxxxxxx> wrote:
>
> > Zachary Amsden wrote:
> > > I'm speaking specifically in terms of 64-bit platforms here.
> > > Shouldn't we unconditionally drop outb_p doing extra port I/O on
> > > 64-bit architectures?  Especially considering they don't even have
> > > an ISA bus where the decode timing could even matter?
> > Why should the bitsize of the CPU matter for this?  It seems one of
> > the less meaningful keys for this.
>
> Well, anything that runs x86_64 should be a fairly modern system.
>  

Yes, but you hardly want a situation where the machine works booting a 
32-bit kernel and not a 64-bit kernel, or vice versa.

Furthermore, it's not so much about "modern" versus "old", it is about 
picking a certain set of bugs.

	-hpa
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