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From: David Woodhouse <dwmw2@infradead.org>
To: "dibacco@inwind.it" <dibacco@inwind.it>
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Date: Wed, 21 Jul 2004 14:37:19 -0400
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Cc: linux-mtd <linux-mtd@lists.infradead.org>
Subject: Re: mmap on jffs2
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On Wed, 2004-07-21 at 20:23 +0200, dibacco@inwind.it wrote:
> Hi,
> 
> I have a problem mapping a file opened with flag O_RDWR. This file is
> housed on a jffs2 file system that currently lives on simple ram.
> Could you give me an hint where to search for a possible solution? If
> I open the file in O_RDONLY mode the mapping is done, instead with
> O_RDWR mmap returns -EINVAL.

JFFS2 does not support shared writable mapping. This is a feature :)

Use MAP_PRIVATE instead of MAP_SHARED.

-- 
dwmw2