[PATCH dma-mapping tree] arm64: default to the direct mapping in get_arch_dma_ops

[Christoph Hellwig]

On Fri, Dec 28, 2018 at 05:30:57PM +0000, Liviu Dudau wrote:
> On Wed, Dec 19, 2018 at 05:55:02PM +0100, Christoph Hellwig wrote:
> > As all maintainers seem to be off to their holidays already I've
> > applied this now given that I don't want to leave arm64 in broken
> > state in linux-next any longer.
> 
> Hi Christoph,
> 
> Talking about linux-next being broken, I found out that with
> next-20181224 the nvme driver with an HMB NVMe SSD (Toshiba RC-100)
> also fails on a RK3399 board (NanoPC T4). It works with v4.20 just fine.
> 
> The reason for linking it to your patchset is that I get this on
> next-20181224 (the DMA addresses looks the same for the allocated buffers):

Your patch looks correct.  Can you send the dma_alloc_coherent
to dma_alloc_attrs switch to linux-nvme list with a proper commit log
and signoff?