linux-kernel - Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP

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Message-ID: <20070608160929.GA3366@infradead.org>
Date:	Fri, 8 Jun 2007 17:09:29 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Jared Hulbert <jaredeh@...il.com>
Cc:	Christoph Hellwig <hch@...radead.org>, carsteno@...ibm.com,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	richard.griffiths@...driver.com,
	Richard Griffiths <res07ml0@...izon.net>,
	Linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP

On Fri, Jun 08, 2007 at 09:05:32AM -0700, Jared Hulbert wrote:
> Okay so we need some driver that opens/closes this ROM.  This has been
> done from the dcss block device but that doesn't make sense for most
> embedded systems.  The MTD allows for this with point(),unpoint().
> That should work just fine.  It does introduce the MTD as a dependancy
> which is unnecessary in many systems, but it will work now.

The Linux solution to this problem would be to introduce an option for
mtd write support.  That way the majority of the code doesn't heave to
be compiled for the read-only case but you still get a uniform interface.
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