linux-kernel - Re: [PATCH 4/7] VFS: Add generic_file_llseek

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Message-ID: <20110823160745.GR25996@one.firstfloor.org>
Date:	Tue, 23 Aug 2011 18:07:45 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Andi Kleen <andi@...stfloor.org>, viro@...iv.linux.org.uk,
	hch@...radead.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 4/7] VFS: Add generic_file_llseek_size

On Tue, Aug 23, 2011 at 02:51:56PM +0200, Arnd Bergmann wrote:
> On Monday 22 August 2011, Andi Kleen wrote:
> > From: Andi Kleen <ak@...ux.intel.com>
> > 
> > Add a generic_file_llseek variant to the VFS that allows passing in
> > the current file size, instead of always using inode->i_size.
> > This can be used to eliminate some cut'n'paste seek code in ext4.
> > 
> > Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> 
> Ah, very nice. I think you can use the same trick to remove duplication
> in default_llseek by always setting the limit to MAX_LFS_FILESIZE.

Not in this patchkit, but some other time perhaps.

-Andi
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