From: David Howells <dhowells@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: akpm@linux-foundation.org, benh@kernel.crashing.org,
linux-kernel@vger.kernel.org, hpa@zytor.com,
johannes@sipsolutions.net
Subject: Re: [PATCH] Fix get_order()
Date: Tue, 06 Mar 2007 18:51:13 +0000 [thread overview]
Message-ID: <11544.1173207073@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0703061040260.5963@woody.linux-foundation.org>
Linus Torvalds <torvalds@linux-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
next prev parent reply other threads:[~2007-03-06 18:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-06 17:39 [PATCH] Fix get_order() David Howells
2007-03-06 17:58 ` H. Peter Anvin
2007-03-06 18:21 ` David Howells
2007-03-06 18:41 ` Linus Torvalds
2007-03-06 18:51 ` David Howells [this message]
2007-03-07 3:28 ` Linus Torvalds
2007-03-07 11:43 ` David Howells
2007-03-07 16:02 ` ALIGN via ilog2 without gccisms (Re: [PATCH] Fix get_order()) Oleg Verych
2007-03-07 16:38 ` Linus Torvalds
2007-03-07 17:24 ` Oleg Verych
2007-03-07 18:05 ` Linus Torvalds
2007-03-09 23:13 ` ALIGN " Oleg Verych
2007-03-09 23:15 ` Linus Torvalds
2007-03-10 0:31 ` Oleg Verych
2007-03-10 8:01 ` ALIGN Oleg Verych
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