linux-kernel - Re: [PATCH v8 15/16] ARM: LPAE: add support for ATAG

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Date:	Wed, 9 Nov 2011 00:24:37 +0000
From:	Will Deacon <will.deacon@....com>
To:	Nicolas Pitre <nico@...xnic.net>
Cc:	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 15/16] ARM: LPAE: add support for ATAG_MEM64

Hi Nicolas,

On Tue, Nov 08, 2011 at 11:38:12PM +0000, Nicolas Pitre wrote:
> On Mon, 7 Nov 2011, Catalin Marinas wrote:
> 
> > From: Will Deacon <will.deacon@....com>
> > 
> > LPAE provides support for memory banks with physical addresses of up
> > to 40 bits.
> > 
> > This patch adds a new atag, ATAG_MEM64, so that the Kernel can be
> > informed about memory that exists above the 4GB boundary.
> > 
> > Signed-off-by: Will Deacon <will.deacon@....com>
> > Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> 
> NAK.  Any LPAE capable platform to come is, by definition, a new 
> platform.  It therefore should be using DT upfront.

Ok, well in that case it's a simple matter of defining #address-cells
correctly in your .dts and we can simply drop this patch. Does that sound
like the right approach?

Will
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