linux-kernel - Re: [PATCH] Fix get

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Date:	Tue, 06 Mar 2007 18:41:07 +0000
From:	David Howells <dhowells@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	torvalds@...l.org, akpm@...l.org, benh@...nel.crashing.org,
	linux-kernel@...r.kernel.org, johannes@...solutions.net
Subject: Re: [PATCH] Fix get_order() [try #2] 

H. Peter Anvin <hpa@...or.com> wrote:

> Eh? roundup_pow_of_two(1) should be 0; 2^0 = 1.

Nonono.

	roundup_pow_of_two(0)  => ?
	roundup_pow_of_two(1)  => 1
	roundup_pow_of_two(2)  => 2
	roundup_pow_of_two(3)  => 4
	roundup_pow_of_two(4)  => 4
	roundup_pow_of_two(5)  => 8
	roundup_pow_of_two(6)  => 8
	roundup_pow_of_two(7)  => 8
	roundup_pow_of_two(8)  => 8
	roundup_pow_of_two(9)  => 16
	roundup_pow_of_two(10) => 16
	roundup_pow_of_two(11) => 16
	...

David
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