fully convert arm to use dma-direct

[Christoph Hellwig]

On Sat, Apr 23, 2022 at 11:27:13AM +0100, Marc Zyngier wrote:
>> I think Marc Z has a Netwinder that he can test this on. Marc?
>> I have one too, just not much in my office because of parental leave.
>
> I'm about to travel for a week. Can this wait until I'm back?
> This is one of the few boxes that isn't hooked up to the PDU,
> so I can't operate it remotely.

No rush at all from my side except that I;d love to get it into
5.19.