linux-kernel - Re: [PATCH] arm/tegra: select AUTO

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Message-ID: <20111014201737.GW21648@n2100.arm.linux.org.uk>
Date:	Fri, 14 Oct 2011 21:17:37 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Nicolas Pitre <nico@...xnic.net>
Cc:	Arnd Bergmann <arnd@...db.de>, Stephen Warren <swarren@...dia.com>,
	Olof Johansson <olof@...om.net>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"Colin Cross (ccross@...roid.com)" <ccross@...roid.com>,
	Erik Gilling <konkers@...roid.com>
Subject: Re: [PATCH] arm/tegra: select AUTO_ZRELADDR by default

On Fri, Oct 14, 2011 at 04:14:12PM -0400, Nicolas Pitre wrote:
> On Fri, 14 Oct 2011, Russell King - ARM Linux wrote:
> 
> > On Fri, Oct 14, 2011 at 02:01:07PM -0400, Nicolas Pitre wrote:
> > > The way I'm restructuring things around this is that AUTO_ZRELADDR will 
> > > always be active by default, just like ARM_PATCH_PHYS_VIRT now.  This 
> > > platform specific exclusion thinking is a step backward so I'd prefer if 
> > > people would refrain from going there for the moment.
> > 
> > Are you expecting everyone to change the way they load the zImage
> > overnight then?
> 
> No, of course.  But adding restrictions in the kernel build because 
> u-Boot's own image format dictates such restrictions doesn't make sense.  
> Those restrictions must be pushed towards the uImage encapsulation step, 
> not higher the kernel config hierarchy.

You're not understanding again.

I'm talking about people who _explicitly_ load the zImage at a different
address to which the decompressed image ends up.  With AUTO_ZRELADDR=y
their setup will break unless they stop that behaviour, which takes
away one of the advantages of using the zImage format.
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