linux-kernel - Re: [PATCH] Add "is_power_of

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Message-ID: <3511.1170326487@redhat.com>
Date:	Thu, 01 Feb 2007 10:41:27 +0000
From:	David Howells <dhowells@...hat.com>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	"Robert P. J. Day" <rpjday@...dspring.com>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Paul Mackerras <paulus@...ba.org>, dhowells@...hat.com,
	galak@...nel.crashing.org
Subject: Re: [PATCH] Add "is_power_of_2" checking to log2.h. 

Nick Piggin <nickpiggin@...oo.com.au> wrote:

> > + *  Determine whether some value is a power of two, where zero is
> > + * *not* considered a power of two.
> > + */
> 
> Why the qualifier? Zero *is* not a power of 2, is it?

The qualifier is worth leaving in the comment, just so that people who want to
use the function can be certain what it'll do for them.

David
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