linux-kernel - Re: [PATCH] Fix get

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Date:	Tue, 06 Mar 2007 10:37:06 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	David Howells <dhowells@...hat.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]

David Howells wrote:
> From: David Howells <dhowells@...hat.com>
> 
> Provide an ilog2_up() that rounds its result up (ilog2() rounds down).
> 
> Fix get_order() to use ilog2_up() not ilog2() to get the correct rounding.
> 
> Adjust the documentation surrounding ilog2() and co. to indicate what rounding
> they perform.
> 
> Fix roundup_pow_of_two(1) to give 1, not 0.

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

	-hpa
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