linux-kernel - Re: [PATCH] x86: use the same node

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Message-ID: <alpine.DEB.2.00.1109191748170.8943@chino.kir.corp.google.com>
Date:	Mon, 19 Sep 2011 17:51:03 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>,
	Tejun Heo <htejun@...il.com>
cc:	linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Yinghai Lu <yinghai.lu@...cle.com>
Subject: Re: [PATCH] x86: use the same node_distance for 32 and 64-bit

On Mon, 19 Sep 2011, H Hartley Sweeten wrote:

> The node_distance function is not x86 64-bit specific.  Having the #ifdef
> around the extern function declaration and the #define causes the default
> node_distance macro to be used in asm-generic/topology.h. This also causes
> a sparse warning in arch/x86/mm/numa.c when CONFIG_X86_64 is not set:
> 
> warning: symbol '__node_distance' was not declared. Should it be static?
> 
> Remove the #ifdef to fix both issues.
> 
> Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Yinghai Lu <yinghai@...nel.org>

 [ I think kernel.org emails are still down, so I sent this to
   htejun@...il.com instead. ]

Acked-by: David Rientjes <rientjes@...gle.com>

> ---
> diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
> index c006924..800f77c 100644
> --- a/arch/x86/include/asm/topology.h
> +++ b/arch/x86/include/asm/topology.h
> @@ -130,10 +130,8 @@ extern void setup_node_to_cpumask_map(void);
>  	.balance_interval	= 1,					\
>  }
>  
> -#ifdef CONFIG_X86_64
>  extern int __node_distance(int, int);
>  #define node_distance(a, b) __node_distance(a, b)
> -#endif
>  
>  #else /* !CONFIG_NUMA */
>  
--
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