linux-kernel - Re: [RFC][PATCH] x86: Cleanup Kconfig

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Message-ID: <20150602113542.GA3443@gmail.com>
Date:	Tue, 2 Jun 2015 13:35:42 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] x86: Cleanup Kconfig


* Peter Zijlstra <peterz@...radead.org> wrote:

> 
> While looking at arch/x86/Kconfig I noticed a lot of if X86_{32,64}
> clauses in the X86 symbol. Its much simpler to simply but these selects
> in the right symbol and do away with the conditionals.
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---
>  arch/x86/Kconfig | 30 +++++++++++++++---------------
>  1 file changed, 15 insertions(+), 15 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 8fec04407245..a259db4cfe8c 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -11,6 +11,12 @@ config X86_32
>  	depends on !64BIT
>  	select CLKSRC_I8253
>  	select HAVE_UID16
> +	select HAVE_AOUT
> +	select HAVE_GENERIC_DMA_COHERENT
> +	select ARCH_WANT_IPC_PARSE_VERSION
> +	select MODULES_USE_ELF_REL
> +	select CLONE_BACKWARDS
> +	select OLD_SIGACTION

So I'd rather do it the other way around: move the remaining selects from X86_32 
and X86_64 to the X86 section, and maybe group them by bitness.

The advantage: accidental duplication is more obviously wrong and a single 
feature's bitness-presence is obvious at a glance.

Thanks,

	Ingo
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