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Subject: Re: [PATCH v2] powerpc: add real mode support for dma operations on
 powernv
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Mon, 08 Jul 2013 17:20:55 +1000
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Cc: Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org,
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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.