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Date: Wed, 27 Jan 2010 13:30:20 +0100 (CET)
From: Julia Lawall <julia@diku.dk>
To: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
Cc: Dan Carpenter <error27@gmail.com>, kernel-janitors@vger.kernel.org,
       linux-kernel@vger.kernel.org
Subject: Re: bug list: assigning negative values to unsigned variables
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On Wed, 27 Jan 2010, Bernd Petrovitsch wrote:

> On Mit, 2010-01-27 at 11:57 +0100, Julia Lawall wrote:
> > On Wed, 27 Jan 2010, Dan Carpenter wrote:
> > 
> > > Fixing the places which assign negative values to unsigned variables is a good janitor task.
> > 
> > I had the impression that assignment to -1 was done sometimes as a 
> > portable way to initialize the variable to 0xffff (for any number of f's).  
> > So perhaps it is not so trivial to fix.
> Any particular reason that ~0U, ~0UL, and ~0ULL shouldn't do the same
> (without relying on conversion from signed to unsigned)?

Then the constant specifies the type?

julia