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Re: [PATCH] x86: i486: stub out init-arch logic

From: Mike Frysinger <vapier at gentoo dot org>
To: "H.J. Lu" <hjl dot tools at gmail dot com>
Cc: Matt Turner <mattst88 at gmail dot com>, GNU C Library <libc-alpha at sourceware dot org>
Date: Tue, 11 Aug 2015 23:45:29 -0400
Subject: Re: [PATCH] x86: i486: stub out init-arch logic
Authentication-results: sourceware.org; auth=none
References: <1439285278-22006-1-git-send-email-vapier at gentoo dot org> <CAMe9rOr-Z7b4TkfT1ZO3vMbLytPSjSEsc-vRgdrHNQce+ryhEg at mail dot gmail dot com> <CAEdQ38FJsezdNM5geu3wZicOVMyUKT4NNRE4cDyvC3BFsP2Ybg at mail dot gmail dot com> <CAMe9rOrfBQVAwfVc78u-iLCXmQighimb0=oMKTg_p9cPipFBVQ at mail dot gmail dot com>

On 11 Aug 2015 12:29, H.J. Lu wrote:
> On Tue, Aug 11, 2015 at 12:19 PM, Matt Turner <mattst88@gmail.com> wrote:
> > On Tue, Aug 11, 2015 at 3:42 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> >> On Tue, Aug 11, 2015 at 2:27 AM, Mike Frysinger <vapier@gentoo.org> wrote:
> >>> The common x86 init-arch logic hardcodes the usage of cpuid which breaks
> >>> running on i486 and older systems.  Rather than add more checking to the
> >>> common case only for old cpus, stub it out for i486 systems entirely.
> >>
> >> cpuid is added to i486 and glibc no longer supports i386.  cpuid can be
> >> used on x86 without checking and i486 glibc should use cpuid on i686.
> >
> > There are apparently some non-Intel 486-compatible CPUs without the
> > CPUID instruction -- see the Gentoo bug report.
> 
> Please check out  hjl/cpuid/master branch.  It should work.

as long as it doesn't require cpuid and is merged for 2.23, sounds fine
-mike

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References:
- [PATCH] x86: i486: stub out init-arch logic
  - From: Mike Frysinger
- Re: [PATCH] x86: i486: stub out init-arch logic
  - From: H.J. Lu
- Re: [PATCH] x86: i486: stub out init-arch logic
  - From: Matt Turner
- Re: [PATCH] x86: i486: stub out init-arch logic
  - From: H.J. Lu

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