From: Sascha Hauer <s.hauer@pengutronix.de>
To: Belisko Marek <marek.belisko@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: sparse warnings
Date: Thu, 18 Nov 2010 11:01:33 +0100 [thread overview]
Message-ID: <20101118100133.GU6017@pengutronix.de> (raw)
In-Reply-To: <AANLkTik5032UyqFa8XUUMWGhLAeXbOZqGQ_GmZo+Bksc@mail.gmail.com>
On Thu, Nov 18, 2010 at 10:36:51AM +0100, Belisko Marek wrote:
> Hi,
>
> On Wed, Nov 17, 2010 at 10:11 AM, Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > Hi Marek,
> >
> > On Mon, Nov 15, 2010 at 03:20:47PM +0100, Belisko Marek wrote:
> >> Hi,
> >>
> >> barebox compilation with C=1 produce a lot of sparse warnings.
> >> Mainly concerning __iomem problems with readb() and similar functions.
> >>
> >> Make it sense to take care or just could be omitted?
> >
> > I think it makes sense to work on this. Then we can see the useful
> > warnings buried under the __iomem warnings.
> >
> > I had the idea of adding a
> >
> > #define IOMEM(addr) ((void __force __iomem *)(addr))
> >
> > and use it where appropriate.
> Maybe stupid question but couldn't be __iomem mechanism removed completely?
> Do we need to check for different address_space? In my opinion it
> makes no sense in
> barebox.
I have a better feeling letting it in. There may be no different address
spaces on Arm, but there are for exmample on x86.
You can simply do a #define __iomem in include/linux/compiler.h to
silence these kinds of warnings temporarily if you are not interested.
I agree that at least on Arm these warnings will not reveal any real
bugs.
Sascha
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next prev parent reply other threads:[~2010-11-18 10:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-15 14:20 Belisko Marek
2010-11-17 9:11 ` Sascha Hauer
2010-11-18 9:36 ` Belisko Marek
2010-11-18 10:01 ` Sascha Hauer [this message]
2010-11-18 10:22 ` Uwe Kleine-König
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