linux-kernel - Re: [PATCH] Eliminate result signage problem in asm-x86

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Message-ID: <20070815222355.GA5069@one.firstfloor.org>
Date:	Thu, 16 Aug 2007 00:23:55 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Chuck Lever <chuck.lever@...cle.com>
Cc:	andi@...stfloor.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Eliminate result signage problem in asm-x86_64/bitops.h

On Wed, Aug 15, 2007 at 05:02:47PM -0400, Chuck Lever wrote:
> The return type of __scanbit() doesn't match the return type of
> find_{first,next}_bit().  Thus when you construct something like
> this:
> 
>    boolean ? __scanbit() : find_first_bit()

Why would you want to write this?  What is boolean?
Do they have different arguments?

It's on my todo list for some time to special case
f_f_b() and friends for smaller arguments. Would
that eliminate this construct?

-Andi
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