linux-kernel - Re: [PATCH]is_power_of

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Date:	Mon, 25 Jun 2007 14:13:16 +0200
From:	Johannes Weiner <hannes-kernel@...urebad.de>
To:	vignesh babu <vignesh.babu@...ro.com>
Cc:	daniel.pirkl@...il.cz, dushistov@...l.ru,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Kernel Janitors List <kernel-janitors@...ts.osdl.org>
Subject: Re: [PATCH]is_power_of_2-ufs/super.c

Hi,

On Thu, Jun 14, 2007 at 01:39:18PM +0530, vignesh babu wrote:
> Replacing (n & (n-1)) in the context of power of 2 checks
> with is_power_of_2

You might want to run

	egrep -R '([a-zA-Z0-9_.>]+) *& *\(\1 *- *1\)' /usr/src/linux

This does not match if the check is broken into multiple lines, though.
Still, 66 matches so far. Perhaps a big patch that removes most of these
occurrences would be more appropriate.

	Hannes
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