From: Michael Buesch <fsdeveloper@yahoo.de>
To: Stelian Pop <stelian@popies.net>
Subject: Re: [PATCH 2.4.21] meye driver update
Date: Mon, 16 Jun 2003 16:54:41 +0200
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References: <20030615163138.GD1857@deep-space-9.dsnet> <200306151906.57099.fsdeveloper@yahoo.de> <20030615212935.GA1582@deep-space-9.dsnet>
In-Reply-To: <20030615212935.GA1582@deep-space-9.dsnet>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Sunday 15 June 2003 23:29, Stelian Pop wrote:
> On Sun, Jun 15, 2003 at 07:06:56PM +0200, Michael Buesch wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > On Sunday 15 June 2003 18:31, Stelian Pop wrote:
> > > Hi,
> >
> > Hi Stelian,
> >
> > > +void dma_free_coherent(struct pci_dev *dev, size_t size,
> >
> >                           ^^^^^^^^^^^^^^^^^^^
> >
> > > +                         void *vaddr, dma_addr_t dma_handle)
> >
> >                                          ^^^^^^^^^^^^^^^^^^^^^
> > Why do you define these unused parameters?
>
> Because it's backported from 2.5, and I took it as it, without
> editing.
>
> > > +{
> > > +        free_pages((unsigned long)vaddr, get_order(size));
> > > +}
> >
> > And why are they defined in 2.5, too, althought unused.
> > Is there some reason?
>
> Unused of ix86 because bus addresses are the same as virtual addresses.
> This is not however the case on other architetures, see
> Documentation/DMA-mapping.txt.

Yes, I now understand, why it is in 2.5, but isn't it better,
to remove these parameters from your patch, because it is only
a local copy in your driver and not used by any other drivers.
And your driver is (if I didn't miss something) for running on
i386 only; there is no other version of this function for
other architectures, that need these parameters.
So wouldn't it be better to simply remove them, because
they are completely useless. IMHO their
just confusing.

>
> Stelian.

- -- 
Regards Michael B?sch
http://www.8ung.at/tuxsoft
 16:49:26 up 8 min,  1 user,  load average: 1.07, 0.96, 0.49

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