linux-kernel - Re: [RFC] x86: merge nmi

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Date:	Sun, 18 May 2008 14:29:14 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Tom Spink <tspink@...il.com>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Slaby <jirislaby@...il.com>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: [RFC] x86: merge nmi_32-64 to nmi.c

[Andi Kleen - Sun, May 18, 2008 at 12:25:42PM +0200]
| Cyrill Gorcunov wrote:
| 
| > yes, but what to do with absence of __nmi_count on 32bit and die_nmi
| > uses different number of args? gcc follows both pathes anyway trying
| > to evaluate where I prefer it would not... I mean I've got errors
| > on compiling procedue 'cause of different number of args for die_nmi
| > used in 32bit mode. That is why I've asked Thomas if it possible to
| > add "panic" boot option for 32bit mode and make it familiar with 64bit
| > mode and merge them eventually.
| 
| Sorry just pointed out why the Kconfig idea doesn't work, nothing more.
| 
| If you want to avoid ifdefs then you have to unify the functionality
| first. Putting syntactical sugar on ifdefs doesn't make sense.
| 
| I haven't kept track of the exact state of the code, but if the per cpu
| data macros are finally as efficient as the PDA you could move the
| nmi_count to per_cpu in both for once.
| 
| -Andi
| 

ok, thanks

		- Cyrill -
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