Re: [RFC PATCH 6/6] sparc64: Enable 64-bit DMA

[Christoph Hellwig]

Hi Tushar,

On Fri, Oct 07, 2016 at 01:09:15AM -0700, tndave wrote:
> With change made by patch 6/6, dma_addr_t is always 64-bit, no matter if
> device DMA mask is 32-bit (i.e. using existing IOMMU) or 64-bit (i.e
> using ATU)

But only iff CONFIG_ARCH_ATU is set.  Anyway, I'll wait for your patches
to got in first and will then propose getting rid of
CONFIG_ARCH_DMA_ADDR_T_64BIT separately.