linux-kernel - Re: [PATCH] x86: CONFIG_EFI should select CONFIG

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Message-ID: <4DF0DAAB.7010005@zytor.com>
Date:	Thu, 09 Jun 2011 07:37:31 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg@...hat.com>
CC:	x86@...nel.org, linux-kernel@...r.kernel.org, pjones@...hat.com
Subject: Re: [PATCH] x86: CONFIG_EFI should select CONFIG_RELOCATABLE

On 06/09/2011 07:32 AM, Matthew Garrett wrote:
> EFI doesn't provide any guarantees that any given address will be free,
> so the bootloader must have the freedom to position the kernel
> appropriately. Make CONFIG_EFI select CONFIG_RELOCATABLE in order to
> ensure that this constraint is satisfiable.
> 
> Signed-off-by: Matthew Garrett <mjg@...hat.com>
> ---
>  arch/x86/Kconfig |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index da34972..580cd31 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1454,6 +1454,7 @@ config ARCH_USES_PG_UNCACHED
>  config EFI
>  	bool "EFI runtime service support"
>  	depends on ACPI
> +	select RELOCATABLE
>  	---help---
>  	  This enables the kernel to use EFI runtime services that are
>  	  available (such as the EFI variable services).

Can we make this a depends on instead of select?

	-hpa

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