linux-kernel - Re: [PATCH 8/9] [HACK] ARM: imx: work around v7_cpu

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Message-ID: <20130219051006.GB3108@S2101-09.ap.freescale.net>
Date:	Tue, 19 Feb 2013 13:10:09 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>
CC:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	<linux-arm-kernel@...ts.infradead.org>,
	Stephen Warren <swarren@...dia.com>,
	Pavel Machek <pavel@...x.de>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	<linux-kernel@...r.kernel.org>, <arm@...nel.org>,
	Simon Horman <horms+renesas@...ge.net.au>,
	Dinh Nguyen <dinguyen@...era.com>
Subject: Re: [PATCH 8/9] [HACK] ARM: imx: work around v7_cpu_resume link error

On Mon, Feb 18, 2013 at 11:11:30PM -0500, Nicolas Pitre wrote:
> On Tue, 19 Feb 2013, Shawn Guo wrote:
> 
> > On Mon, Feb 18, 2013 at 12:06:32PM -0500, Nicolas Pitre wrote:
> > > Try the following instead.  It makes the code simpler and easier to 
> > > debug.
> > > 
> > It works now.  Thanks, Nico.  Care to send a patch for it?  I'd like
> > to apply it.
> 
> ----- >8
> 
> FRom: Nicolas Pitre <nicolas.pitre@...aro.org>
> Date: Mon, 18 Feb 2013 12:06:32 -0500 (EST)
> Subject: ARM: mach-imx: move early resume code out of the .data section
> 
> Building the kernel with allyesconfig fails because the i.mx early
> resume code located in the .data section is unable to fixup the bl
> relocation as the branch target gets too far away.
> 
> The idea of having code in the .data section allows for easy access to 
> nearby data using relative addressing while the MMU is off. However it 
> is probably best to move the code back to the .text section where it 
> belongs and fixup the data access instead.  This solves the bl reloc
> issue (at least until this becomes a general problem) and simplifies
> the code as well.
> 
> Signed-off-by: Nicolas Pitre <nico@...aro.org>

Applied as a fix for 3.9-rc, thanks.

Shawn

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