From mboxrd@z Thu Jan  1 00:00:00 1970
From: nico@fluxnic.net (Nicolas Pitre)
Date: Sun, 12 Jun 2011 02:14:13 -0400 (EDT)
Subject: [PATCH] ARM: Make sure appended device tree data won't overlap
	kernel BSS
In-Reply-To: <20110513112120.GO31483@atomide.com>
References: <20110429102623.GX3755@atomide.com>
	<alpine.LFD.2.00.1104290909310.24613@xanadu.home>
	<20110429135334.GR5126@n2100.arm.linux.org.uk>
	<alpine.LFD.2.00.1104291509540.24613@xanadu.home>
	<20110504072317.GU2092@atomide.com>
	<alpine.LFD.2.00.1105040936040.24613@xanadu.home>
	<20110509111929.GA11410@atomide.com>
	<20110509144949.GE30958@atomide.com>
	<20110512125952.GN31483@atomide.com>
	<alpine.LFD.2.00.1105130930330.2762@xanadu.home>
	<20110513112120.GO31483@atomide.com>
Message-ID: <alpine.LFD.2.00.1106120209450.2142@xanadu.home>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Fri, 13 May 2011, Tony Lindgren wrote:

> From: Tony Lindgren <tony@atomide.com>
> Date: Thu, 12 May 2011 05:29:49 -0700
> Subject: [PATCH] ARM: zImage: Make sure appended device tree data won't overlap kernel BSS
> 
> Do this before relocating the compressed kernel + device tree data.
> Otherwise we would have to split the copying into two parts, or copy
> the device tree data twice.
> 
> As we only have one register available, pass the size of kernel BSS
> via linker and do the calculation using r1, then save it to the stack.
> 
> Note that this patch now makes the stack also usable earlier for
> CONFIG_ARM_APPENDED_DTB.
> 
> Signed-off-by: Tony Lindgren <tony@atomide.com>
[...]

Please tell me what you think of this alternative: 
http://article.gmane.org/gmane.linux.ports.arm.kernel/120182
I think it is a cleaner solution.


Nicolas