linux-kernel - Re: [PATCH 1/2] Add /sys/firmware/memmap

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Date:	Thu, 26 Jun 2008 11:00:16 -0700
From:	"H. Peter Anvin" <hpa@...nel.org>
To:	Mikael Pettersson <mikpe@...uu.se>
CC:	Bernhard Walle <bwalle@...e.de>, Vivek Goyal <vgoyal@...hat.com>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	kexec@...ts.infradead.org, yhlu.kernel@...il.com
Subject: Re: [PATCH 1/2] Add /sys/firmware/memmap

Mikael Pettersson wrote:
> Bernhard Walle writes:
>  > > It should be configurable. Whether it's done via CONFIG_KEXEC or its own
>  > > option I don't care.
>  > 
>  > Ok, changed:
>  > 
>  > diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
>  > index 1008737..73fcc59 100644
>  > --- a/drivers/firmware/Kconfig
>  > +++ b/drivers/firmware/Kconfig
>  > @@ -28,7 +28,7 @@ config EDD_OFF
>  >  
>  >  config FIRMWARE_MEMMAP
>  >      def_bool y
>  > -    depends on X86_64 || X86_32
>  > +    depends on (X86_64 || X86_32) && KEXEC
>  >  
>  >  config EFI_VARS
>  >         tristate "EFI Variable Support via sysfs"
> 
> Yep, thanks.
> 

Making this depend on KEXEC would be most unfortunate.  This is valuable 
information for finding all kinds of issues even in the absence of KEXEC.

I really don't see a point in making this configurable, except perhaps 
under CONFIG_EMBEDDED.

	-hpa
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