linux-kernel - Re: [patch] optimize o_direct on block device

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Date:	Tue, 5 Dec 2006 09:44:10 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	"Chen, Kenneth W" <kenneth.w.chen@...el.com>,
	"'Zach Brown'" <zach.brown@...cle.com>,
	Chris Mason <chris.mason@...cle.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch] optimize o_direct on block device - v2

On Tue, 5 Dec 2006 11:02:30 +0000
Christoph Hellwig <hch@...radead.org> wrote:

> > +	long res;
> > +
> > +	if ((bio->bi_rw & 1) == READ)
> 
> I just wanted to complain about not using a proper helper for this,
> but apparently we don't have one yet..

There's bio_data_dir().
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