[PATCH v2] powerpc: add real mode support for dma operations on powernv

[Benjamin Herrenschmidt]

On Mon, 2013-07-08 at 14:44 +1000, Alexey Kardashevskiy wrote:

> diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
> index 25d76c4..7ea82c1 100644
> --- a/arch/powerpc/platforms/powernv/pci.h
> +++ b/arch/powerpc/platforms/powernv/pci.h
> @@ -52,6 +52,7 @@ struct pnv_ioda_pe {
>  	int			tce32_seg;
>  	int			tce32_segcount;
>  	struct iommu_table	tce32_table;
> +	phys_addr_t		it_index_rm;

Please ....

The fact that we hijack the it_index field of the iommu table
for the virtual address is bad enough, but really don't need
to perpetuate this :-)

Call the field something decent such as "tce_inval_reg_phys"

Cheers,
Ben.