[RFC PATCH] ARM: Export the CPU logical map to modules

[dave.martin@linaro.org (Dave Martin)]

Hi,

Does anyone have a comment on this?

Cheers
---Dave

On Mon, Jan 28, 2013 at 05:34:04PM +0000, Dave Martin wrote:
> It is reasonable for loadable modules to be CPU topology aware
> (particular examples include cpufreq and cpuidle drivers).
> 
> This patch exports __cpu_logical_map, so that modules can use the
> cpu_logical_map() interface declared in <asm/smp_plat.h>.
> 
> Signed-off-by: Dave Martin <dave.martin@linaro.org>
> ---
> If anyone has a strong view on whether this should be
> EXPORT_SYMBOL_GPL(), I don't have a problem with changing
> that.  I'm not sure of the precise etiquette here.
> Certainly this does not feel like a very "public" interface.
> 
> Perhaps we should wrap this in a real function for export
> to modules, rather than encouraging them to poke the
> __cpu_logical_map[] array (albeit via a predefined macro).
> 
> 
>  arch/arm/kernel/setup.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 3f6cbb2..1b9e5bf 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -428,6 +428,7 @@ void cpu_init(void)
>  }
>  
>  int __cpu_logical_map[NR_CPUS];
> +EXPORT_SYMBOL(__cpu_logical_map);
>  
>  void __init smp_setup_processor_id(void)
>  {
> -- 
> 1.7.4.1
>