Re: [PATCH 4/7] mmc: at91_mci: use DMA buffer for read

From: Wolfgang Mües
Date: Wed Mar 03 2010 - 02:34:43 EST

Hi Andrew,

Am Dienstag, 2. März 2010 schrieb Andrew Morton:
> Nicolas Ferre <nicolas.ferre@xxxxxxxxx> wrote:
> > + kunmap_atomic(((void *)sgbuffer)-sg->offset, KM_BIO_SRC_IRQ);
> It's a feature of kunmap_atomic() that it will accept a pointer to any
> location in the page. So the subtraction isn't strictly needed.
> And if the subtraction is removed, the (void*) cast can also be removed.

I did not know this. Thank you for pointing this out. So this part of the
patch (which was purely cosmetic because I have seen no error without the
subtraction) can be omitted.

best regards

i. A. Wolfgang Mües
Auerswald Gesellschaft für Datensysteme mbH
Hardware Development
Telefon: +49 (0)5306 9219 562
Telefax: +49 (0)5306 9219 94
E-Mail: Wolfgang.Mues@xxxxxxxxxxxx

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