linux-kernel - Re: x86: clean up non-smp usage of cpu maps

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Date:	Fri, 18 Apr 2008 18:49:21 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mike Travis <travis@....com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: x86: clean up non-smp usage of cpu maps

On Fri, 18 Apr 2008 17:36:55 GMT Linux Kernel Mailing List <linux-kernel@...r.kernel.org> wrote:

>     x86: clean up non-smp usage of cpu maps
>     
>     Cleanup references to the early cpu maps for the non-SMP configuration
>     and remove some functions called for SMP configurations only.
>     
> ...
>
> index 1179aa0..dc79409 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -10,7 +10,7 @@
>  #include <asm/setup.h>
>  #include <asm/topology.h>
>  
> -#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
> +#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_SMP)

This implies that we can have

	CONFIG_HAVE_SETUP_PER_CPU_AREA && !CONFIG_SMP

which a) appears to be true and b) seems rather dumb?
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