From: Carsten Otte <cotte@de.ibm.com>
To: "Jörn Engel" <joern@logfs.org>
Cc: dhowells <dhowells@redhat.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH][MTD] mtdpart.c: allow other drivers to get physical address of partition
Date: Wed, 01 Aug 2007 14:59:31 +0200 [thread overview]
Message-ID: <46B083B3.80009@de.ibm.com> (raw)
In-Reply-To: <20070801121800.GB2747@lazybastard.org>
Jörn Engel wrote:
> Neither am I. My missing puzzle piece is how to zap all page mappings
> for the chip in question. Maybe the fs/vm meeting at lce will clear
> things up.
I don't think that one is particular hard to do. All you need is:
- count refernces in the driver
- make the xip code return its references after use
- a callback that the driver can call to get its references that are
mapped to userland back which would simply boil down to
filemap_xip_unmap()
- the driver should stop handing out new references for file
operations when calling the callback, and the reference count should
become zero pretty soon.
I'd be happy to do the xip infrastructure parts of this.
next prev parent reply other threads:[~2007-08-01 12:59 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-27 0:04 [PATCH][MTD] mtdpart.c: allow other drivers to get physical address of partition Jared Hulbert
2007-07-27 13:48 ` Jörn Engel
2007-07-27 17:05 ` Jared Hulbert
2007-07-27 17:44 ` Jörn Engel
2007-07-27 20:53 ` Jared Hulbert
2007-07-28 11:43 ` Jörn Engel
2007-07-28 21:08 ` Jared Hulbert
2007-07-31 11:55 ` David Woodhouse
2007-07-31 19:55 ` Jared Hulbert
2007-08-01 11:55 ` Jörn Engel
2007-08-03 1:56 ` Jared Hulbert
2007-08-03 3:01 ` Jörn Engel
2007-08-03 5:23 ` Jared Hulbert
2007-08-03 9:21 ` Jörn Engel
2007-08-03 6:42 ` Jared Hulbert
2007-08-03 12:47 ` Jörn Engel
2007-08-03 22:29 ` Jared Hulbert
2007-08-01 12:18 ` Jörn Engel
2007-08-01 12:59 ` Carsten Otte [this message]
2007-08-01 20:37 ` Jared Hulbert
2007-08-01 23:31 ` Jörn Engel
2007-08-02 7:53 ` Carsten Otte
2007-08-02 21:55 ` Jared Hulbert
2007-08-03 7:59 ` Carsten Otte
2007-08-03 9:17 ` Jörn Engel
2007-08-03 11:03 ` Carsten Otte
2007-08-03 11:31 ` Jörn Engel
2007-08-03 12:21 ` Carsten Otte
2007-08-03 12:58 ` Jörn Engel
2007-08-03 13:09 ` David Woodhouse
2007-08-03 13:18 ` Jörn Engel
2007-08-03 19:45 ` Jared Hulbert
2007-08-03 23:02 ` Jörn Engel
2007-08-04 12:33 ` David Woodhouse
2007-08-04 17:47 ` Jared Hulbert
2007-08-06 6:30 ` Carsten Otte
2007-08-03 18:39 ` Jared Hulbert
2007-08-06 6:23 ` Carsten Otte
2007-08-01 18:03 ` Jared Hulbert
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