Date: Mon, 4 Jun 2007 15:17:24 +0200
From: Adrian Bunk <bunk@stusta.de>
To: Rolf Eike Beer <eike-kernel@sf-tec.de>
Cc: linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>, stable@kernel.org
Subject: Re: [PATCH] Fix roundup_pow_of_two(1)
Message-ID: <20070604131723.GV5500@stusta.de>
References: <200705172356.57620.eike-kernel@sf-tec.de> <20070604114900.GS5500@stusta.de> <200706041413.20477.eike-kernel@sf-tec.de>
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On Mon, Jun 04, 2007 at 02:13:11PM +0200, Rolf Eike Beer wrote:
> Adrian Bunk wrote:
> > On Thu, May 17, 2007 at 11:56:56PM +0200, Rolf Eike Beer wrote:
> > > Fix roundup_pow_of_two(1)
> > >
> > > 1 is a power of two, therefore roundup_pow_of_two(1) should return 1. It
> > > does in case the argument is a variable but in case it's a constant it
> > > behaves wrong and returns 0. Probably nobody ever did it so this was
> > > never noticed.
> >
> > I'm not getting the problem.
> > 2^0 = 1
> 
> Yes. But it returned 0 (not 1 << 0).

Sorry, I had a thinko and you are right.

> Eike

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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