linux-kernel - Re: [PATCH] Prevent IDE boot ops on NUMA system in mainline

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Message-ID: <20080211190438.GB21824@one.firstfloor.org>
Date:	Mon, 11 Feb 2008 20:04:38 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>, bzolnier@...il.com,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Prevent IDE boot ops on NUMA system in mainline

On Mon, Feb 11, 2008 at 09:37:18AM -0800, Linus Torvalds wrote:
> 
> 
> On Mon, 11 Feb 2008, Linus Torvalds wrote:
> > 
> > So we should probably make pcibus_to_node() be an inline function for that 
> > case
> 
> Or, we could just do the ugliest patch ever, namely
> 
> 	-#define pcibus_to_node(node)   (-1)
> 	+#define pcibus_to_node(node)   ((int)(long)(node),-1)
> 
> Wow. It's so ugly it's almost wraps around and comes out the other sides 
> and looks pretty.

(void)arg, ... is better. Trick originally from Jan Beulich I think
(his code is always a good source for useful new C tricks) 

-Andi

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