From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 5/6] introduce __block_write_begin
Date: Wed, 2 Jun 2010 09:25:45 +0200
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References: <20100530204932.GA21002@lst.de> <20100530205018.GF21002@lst.de> <20100601233950.GF8137@quack.suse.cz>
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Cc: Christoph Hellwig <hch@lst.de>, viro@zeniv.linux.org.uk,
	npiggin@suse.de, linux-fsdevel@vger.kernel.org
To: Jan Kara <jack@suse.cz>
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On Wed, Jun 02, 2010 at 01:39:50AM +0200, Jan Kara wrote:
> > +	struct inode *inode = page->mapping->host;
>   This new variable doesn't seem to be used...

It's used to look at ->i_blkbits and passed to the get_block calls.