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

From: [email-masked] (Andrew Morton)
Date: Tue, 2 Mar 2010 13:34:34 -0800

On Fri, 26 Feb 2010 19:39:32 +0100
Nicolas Ferre <[email-masked]> 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.