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

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Date:	Fri, 08 Jun 2007 09:59:20 +0200
From:	Carsten Otte <cotte@...ibm.com>
To:	Christoph Hellwig <hch@...radead.org>, carsteno@...ibm.com,
	Jared Hulbert <jaredeh@...il.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

Christoph Hellwig wrote:
> Jared's patch currently does ioremap on mount (and no iounmap at all).
> That mapping needs to move from the filesystem to the device driver.
The device driver needs to do ioremap on open(), and iounmap() on 
release. That's effectively what our block driver does.
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