Re: [PATCH] x86/cpu: cleanup duplicate dependencies in Kconfig

[Ingo Molnar <mingo@kernel.org>]

* Julian Braha <julianbraha@gmail.com> wrote:

> The Kconfig in the choice menu already has an 'if X86'
> affecting all of the config options within the choice, meaning that each
> of the individual 'depends on' statements in this file is a duplicate
> dependency (dead code).
> 
> Let's leave the initial 'depends on X86_32' in the choice menu,
> and remove the individual dependencies from each option.
> 
> This dead code was found by kconfirm, a static analysis tool for Kconfig.
> 
> Signed-off-by: Julian Braha <julianbraha@gmail.com>
> ---
>  arch/x86/Kconfig.cpu | 16 ----------------
>  1 file changed, 16 deletions(-)
> 
> diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
> index 1377edd9a997..36c8007c1559 100644
> --- a/arch/x86/Kconfig.cpu
> +++ b/arch/x86/Kconfig.cpu
> @@ -45,21 +45,18 @@ choice
>  
>  config M586TSC
>  	bool "Pentium-Classic"
> -	depends on X86_32
>  	help
>  	  Select this for a Pentium Classic processor with the RDTSC (Read
>  	  Time Stamp Counter) instruction for benchmarking.
>  
>  config M586MMX
>  	bool "Pentium-MMX"
> -	depends on X86_32
>  	help
>  	  Select this for a Pentium with the MMX graphics/multimedia
>  	  extended instructions.

Dunno, I don't really like this change, because it obfuscates the
dependency.

Yes, technically the dependency is already expressed shared, but
in practice it's useful to see 'at a glance' whether such a
CPU config option is 32-bit only, 64-bit only or generic.

Thanks,

	Ingo