linux-kernel - Re: [PATCH 01/17] ARM: shmobile: fix memory size for kota2

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Message-ID: <20121003003759.GD31207@verge.net.au>
Date:	Wed, 3 Oct 2012 09:37:59 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...radead.org, arm@...nel.org,
	linux-kernel@...r.kernel.org, Paul Mundt <lethal@...ux-sh.org>,
	Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org
Subject: Re: [PATCH 01/17] ARM: shmobile: fix memory size for kota2_defconfig

On Tue, Oct 02, 2012 at 06:36:40PM +0200, Arnd Bergmann wrote:
> The CONFIG_MEMORY_SIZE value is interpreted as a 32 bit integer, which
> makes sense on a system without PAE. I'm assuming 0x10000000 (256 MB)
> is the correct size, because that is used on most other shmobile
> boards.
> 
> Without this patch, building kota2_defconfig results in:

Hi Arnd,

I looked through my fines and found a config that I believe
worked with a derivative of 2.6.35.7.

It has CONFIG_MEMORY_SIZE=0x1e800000.

So what I suspect has happened is that an extra zero has crept into
arch/arm/configs/kota2_defconfig and the intended value is:

CONFIG_MEMORY_SIZE=0x1e000000

Unfortunately I do not have access to a board to test this,
nor am I aware of anyone who does.

> /home/arnd/linux-arm/arch/arm/kernel/setup.c:790:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: Paul Mundt <lethal@...ux-sh.org>
> Cc: Magnus Damm <magnus.damm@...il.com>
> Cc: linux-sh@...r.kernel.org
> Cc: Simon Horman <horms@...ge.net.au>
> ---
>  arch/arm/configs/kota2_defconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/configs/kota2_defconfig b/arch/arm/configs/kota2_defconfig
> index b7735d6..0ea4c90 100644
> --- a/arch/arm/configs/kota2_defconfig
> +++ b/arch/arm/configs/kota2_defconfig
> @@ -21,7 +21,7 @@ CONFIG_ARCH_SHMOBILE=y
>  CONFIG_KEYBOARD_GPIO_POLLED=y
>  CONFIG_ARCH_SH73A0=y
>  CONFIG_MACH_KOTA2=y
> -CONFIG_MEMORY_SIZE=0x1e0000000
> +CONFIG_MEMORY_SIZE=0x10000000
>  # CONFIG_SH_TIMER_TMU is not set
>  # CONFIG_SWP_EMULATE is not set
>  CONFIG_CPU_BPREDICT_DISABLE=y
> -- 
> 1.7.10
> 
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