linux-kernel - Re: [PATCH] x86: Use CONFIG_64BIT to select between 32 and 64 bit in Kconfig

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Date:	Sat, 10 Nov 2007 14:18:58 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: Use CONFIG_64BIT to select between 32 and 64 bit
 in Kconfig

On Sat, 10 Nov 2007 21:43:27 +0100 Sam Ravnborg wrote:

> This change allow us to use the new syntax:
> make K64BIT={n,y} to select between 32 and 64 bit.
> 
> Signed-off-by: Sam Ravnborg <sam@...nborg.org>
> ---
>  arch/x86/Kconfig |   26 ++++++++------------------
>  1 files changed, 8 insertions(+), 18 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 153c26c..0d86611 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1,34 +1,24 @@
>  # x86 configuration
>  
>  # Select 32 or 64 bit
> -choice
> -	bool "Select 32 or 64 bit"
> -	default X86_32
> +config 64BIT
> +	bool "64 Bit kernel"

	bool "64-bit kernel"

> +	default n
> +	help
> +	  Say yes to build a 64 bit kernel - formerly known as x86_64

	                     64-bit

> +	  Say no to build a 32 bit kernel - formerly known as i386

	                    32-bit

>  
>  config X86_32
> -	bool "32 bit (former ARCH=i386)"
> -	help
> -	  This is Linux's home port.  Linux was originally native to the Intel
> -	  386, and runs on all the later x86 processors including the Intel
> -	  486, 586, Pentiums, and various instruction-set-compatible chips by
> -	  AMD, Cyrix, and others.
> +	def_bool !64BIT
>  
>  config X86_64
> -	bool "64 bit (former ARCH=x86_64)"
> -	help
> -	  Port to the x86-64 architecture. x86-64 is a 64-bit extension to the
> -	  classical 32-bit x86 architecture. For details see
> -	  <http://www.x86-64.org/>.
> -endchoice
> +	def_bool 64BIT
>  
>  ### Arch settings
>  config X86
>  	bool
>  	default y
>  
> -config 64BIT
> -	def_bool X86_64
> -
>  config GENERIC_TIME
>  	bool
>  	default y
> -- 


---
~Randy
-
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