linux-kernel - Re: [PATCH 0/2] unify DMA_..BIT

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Message-ID: <alpine.LFD.0.999.0709181145060.14771@enigma.security.iitk.ac.in>
Date:	Tue, 18 Sep 2007 11:46:40 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Borislav Petkov <bbpetkov@...oo.de>
cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Muli Ben-Yehuda <muli@...ibm.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] unify DMA_..BIT_MASK definitions: v1

Hi Borislav,


On Tue, 18 Sep 2007, Borislav Petkov wrote:

> On Mon, Sep 17, 2007 at 11:01:21PM -0700, Jeremy Fitzhardinge wrote:
> > Muli Ben-Yehuda wrote:
> > >> +#define DMA_64BIT_MASK	DMA_BIT_MASK(64)
> > >>     
> > >
> > > This one does not do what you mean. You need an explicit mask or a
> > > ~0ULL here.
> > 
> > Yeah, I was just about to comment on it.  Its possible the compiler
> > might decide to shift by x%64 = 0.
> > 
> >     J
> ups, i knew that this might be a corner/boundary case. Thanks, updated patches
> follow...

Please fold all three patches into a single patch in the updated series,
otherwise git bisecters falling in between these patches will see the
"redefinition ... previous definition was here" warnings of gcc ...


Satyam
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