linux-kernel - Re: [PATCH] powerpc/mm: setting mmaped page cache property through device tree

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Message-ID: <1259894331.2076.1245.camel@pasglop>
Date:	Fri, 04 Dec 2009 13:38:51 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Segher Boessenkool <segher@...nel.crashing.org>
Cc:	Li Yang <leoli@...escale.com>, linuxppc-dev@...abs.org,
	paulus@...ba.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/mm: setting mmaped page cache property through
 device tree

On Tue, 2009-12-01 at 15:35 +0100, Segher Boessenkool wrote:
> So make the memory known to the kernel, just tell the kernel not to
> use it.  If it's normal system RAM, just put it in the "memory" node
> and do a memreserve on it (or do something in your platform code); if
> it's some other memory, do a device driver for it, map it there.

Right, if he's going to map it cachable he shouldn't bother with using
mem= or crap like that. And /dev/mem should just work.

Cheers,
Ben

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