linux-kernel - Re: [PATCH] xip: export xip_file

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Message-ID: <20110917135346.GA31551@infradead.org>
Date:	Sat, 17 Sep 2011 09:53:47 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Marco Stornelli <marco.stornelli@...il.com>
Cc:	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] xip: export xip_file_fault

On Sat, Sep 17, 2011 at 02:18:11PM +0200, Marco Stornelli wrote:
> From: Marco Stornelli <marco.stornelli@...il.com>
> 
> There aren't sufficient sync points for a fs for xip operations. In 
> particular for the mmap case. It can be not sufficient to lock/unlock 
> to do some operation inside get_xip_mem callback. For xip_file_read 
> it's really easy to write a fs specific wrapper, xip_file_write hold 
> i_mutex so no problem. With this patch it's possible to reuse the
> generic xip_file_fault, using a wrapper function in a fs, without to
> reinvent the wheel.

As usual please send patches to add exports only while adding callers
for it.

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