linux-kernel - Re: [PATCH] [1/1] CPU-i386-Geode: Chipset access macros do not work as expected (2nd try)

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Message-Id: <20070502004824.9f9cbdfe.akpm@linux-foundation.org>
Date:	Wed, 2 May 2007 00:48:24 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Juergen Beisert <juergen127@...uzholzen.de>
Cc:	Mikael Pettersson <mikpe@...uu.se>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...e.de>
Subject: Re: [PATCH] [1/1] CPU-i386-Geode: Chipset access macros do not work
 as expected (2nd try)

On Wed, 2 May 2007 09:16:59 +0200 Juergen Beisert <juergen127@...uzholzen.de> wrote:

> >
> > This clashes with Andi's "msr-index" patch:
> >
> > ftp://ftp.firstfloor.org/pub/ak/x86_64/quilt/patches/msr-index
> 
> I see. He also moves these defines to another file. Not problem where they 
> are. But it isn't possible to replace the macros by the inlined functions in 
> processor.h. The used outb/inb macros fail for various other files.

Oh well.  Please work out what you think needs to be done.

> > Perhaps it'd be best to wait until msr-index goes upstream and to raise a
> > patch then.  Or to redo and retest against 2.6.21-rc7-mm2, which includes
> > msr-index.
> 
> All right. To wait is no problem for me (my system works with my 
> patch.... ;-) )
> 
> > Also, include/asm-x86_64/processor.h has a getCx86(), too.  Does it also
> > need fixing?
> 
> As I can see the macros are used in:
>  - i386/kernel/cpu/cpufreq/gx-suspmod.c (ups, its not in my patch, so it is
>    currently no complete)
>  - i386/kernel/cpu/mtrr/state.c (also not part of my patch yet)
>  - i386/kernel/cpu/cyrix.c
>  - i386/kernel/cpu/mtrr/cyrix.c
> 
> Most comments states Cyrix CPUs when they are using the macros. Is anything 
> with Cyrix 64 bit relevant? Maybe "include/asm-x86_64/processor.h" is a 
> simple copy of "include/asm-i386/processor.h" and nobody delete the unused 
> macros?

I don't think Cyrix make 64-bit stuff, surely.  Andi?

> Please keep me informed and I will resend the patch.
> 

Thanks.  I think Andi was after a better explanation of what was going
wrong with the macros, too.  Please include that in the changelog.

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