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Date: Mon, 21 Apr 2008 12:57:49 -0400
From: "H. Peter Anvin" <hpa@zytor.com>
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To: David Woodhouse <dwmw2@infradead.org>
CC: Andres Salomon <dilinger@queued.net>, Mitch Bradley <wmb@firmworks.com>,
       Yinghai Lu <yhlu.kernel@gmail.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@linux-foundation.org>,
       Joseph Fannin <jfannin@gmail.com>, linux-kernel@vger.kernel.org,
       jordan.crouse@amd.com
Subject: Re: [PATCH 1/2] OLPC: Add support for calling into Open Firmware
References: <20080418014757.52fb4a4f.akpm@linux-foundation.org>	 <20080419031024.GC3503@nineveh.local>	 <20080418202925.b18452c5.akpm@linux-foundation.org>	 <20080419092544.378664a8@ephemeral> <20080419133909.5aa6b63e@ephemeral>	 <86802c440804200334t5cdcd100rfc41e9b1bf379109@mail.gmail.com>	 <480C0582.9010509@firmworks.com>	 <86802c440804202015h2605eff7vc733874dd1f22261@mail.gmail.com>	 <480C1286.3040307@firmworks.com>  <20080421102417.6de71391@ephemeral> <1208793253.9212.507.camel@pmac.infradead.org>
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David Woodhouse wrote:
> 
>> However, until we clean up the promfs stuff, there's no chance of getting
>> an OFW device tree upstream.
> 
> I see no reason why we shouldn't be able to create a 'flattened'
> device-tree during early boot, like the PowerPC kernel does. And use it
> thereafter, having quiesced OpenFirmware. Haven't we already been
> working on unifying this between SPARC and PowerPC kernels?
> 
> I definitely don't think we need to play these tricks to keep
> OpenFirmware resident while the kernel is running. Take a look at your
> second patch -- it's _all_ just lookups in the device-tree, and you're
> inventing a new way to do it instead of using the existing one.
> 

If so, would this apply to OLPC as well?

	-hpa