[PATCH] powerpc: Change archdata dma_data type to dma_addr_t

[Christoph Hellwig]

On Mon, Aug 24, 2009 at 11:17:14AM -0500, Becky Bruce wrote:
> Previously, this was specified as a void *, but that's not
> large enough on 32-bit systems with 36-bit physical
> addressing support.  Change the type to dma_addr_t so it
> will scale based on the size of a dma address.

This looks extreml ugly to me.  It seems like the typical use is to
store a pointer to a structure.  So what about making the direct
dma case follow that general scheme instead?

E.g. declare a

struct direct_dma_data {
	dma_addr_t	direct_dma_offset;
};

and have one normal instace of it, and one per weird cell device.