generic DMA bypass flag

[Robin Murphy]

On 21/11/2019 7:34 am, Christoph Hellwig wrote:
> Robin, does this mean you ACK this series for the powerpc use case?

Yeah, I think we've nailed down sufficient justification now for having 
a generalised flag, so at that point it makes every bit of sense to 
convert PPC's private equivalent.

Robin.

> Alexey and other ppc folks: can you take a look?
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