linux-kernel - Re: [PATCH] Fix get

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Message-ID: <11544.1173207073@redhat.com>
Date:	Tue, 06 Mar 2007 18:51:13 +0000
From:	David Howells <dhowells@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	akpm@...ux-foundation.org, benh@...nel.crashing.org,
	linux-kernel@...r.kernel.org, hpa@...or.com,
	johannes@...solutions.net
Subject: Re: [PATCH] Fix get_order() 

Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> That seems bogus. "n == 1" should give "0", no?

Sigh.  No.  The comment header says it all:

	/**
	 * roundup_pow_of_two - round the given value up to nearest power of two
	 * @n - parameter
	 *
	 * round the given value up to the nearest power of two
	 * - the result is undefined when n == 0
	 * - this can be used to initialise global variables from constant data
	 */

Ie: round, say, 30 up to 32, not 5.

David
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