Messages in this thread | | | Date | Wed, 09 Jan 2008 13:59:33 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. |
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Christer Weinigel wrote: > On Wed, 09 Jan 2008 10:18:11 -0800 > "H. Peter Anvin" <hpa@zytor.com> 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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