linux-kernel - Re: [PATCH 2/3] Kbuild: Implement CONFIG_UIMAGE_KERNEL

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Message-ID: <CAGRGNgWHXrQgVobz+54sFBzj=bTHCKwg+H4_CY5JoGtmETw2yA@mail.gmail.com>
Date:	Wed, 7 Mar 2012 11:52:03 +1100
From:	Julian Calaby <julian.calaby@...il.com>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Michal Marek <mmarek@...e.cz>,
	Russell King <linux@....linux.org.uk>, nico@...xnic.net,
	Haavard Skinnemoen <hskinnemoen@...il.com>,
	Hans-Christian Egtvedt <egtvedt@...fundet.no>,
	Mike Frysinger <vapier@...too.org>,
	Michal Simek <monstr@...str.eu>,
	Paul Mundt <lethal@...ux-sh.org>,
	"David S. Miller" <davem@...emloft.net>,
	Guan Xuetao <gxt@...c.pku.edu.cn>,
	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	microblaze-uclinux@...e.uq.edu.au, linux-sh@...r.kernel.org,
	sparclinux@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 2/3] Kbuild: Implement CONFIG_UIMAGE_KERNEL_NOLOAD

Hi Stephen,

On Wed, Mar 7, 2012 at 11:30, Stephen Warren <swarren@...dotorg.org> wrote:
> This allows the user to use U-Boot's mkimage's -T kernel_noload option
> if their arch Kconfig allows it, and they desire.
>
> Signed-off-by: Stephen Warren <swarren@...dotorg.org>
> ---
> diff --git a/init/Kconfig b/init/Kconfig
> index 6cfd71d..2035562 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -203,6 +203,21 @@ config KERNEL_LZO
>
>  endchoice
>
> +config ALLOW_UIMAGE_KERNEL_NOLOAD
> +       bool
> +
> +config UIMAGE_KERNEL_NOLOAD
> +       bool "Use mkimage's -T kernel_noload instead of -T kernel"
> +       depends on ALLOW_UIMAGE_KERNEL_NOLOAD
> +       help
> +         uImage files of type "kernel" embed an absolute load and entry point
> +         address. If the uImage is loaded to a different address, then the
> +         image must be copied the uImage file to the specified load address.

You seem to have an excess "the uImage file" in here.

> +         This copy is a waste of time if the uImage is in fact completely
> +         relocatable. If your kernel and bootloader support it, you can build
> +         a "kernel_noload" uImage rather than a "kernel" uImage, which
> +         prevents any such copying. If unsure say N.
> +
>  config DEFAULT_HOSTNAME
>        string "Default hostname"
>        default "(none)"

Thanks,

-- 
Julian Calaby

Email: julian.calaby@...il.com
Profile: http://www.google.com/profiles/julian.calaby/
.Plan: http://sites.google.com/site/juliancalaby/
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