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

quoted text
>     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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