[PATCH 16/67] powerpc: rename dma_direct_ to dma_nommu_

[Michael Ellerman]

Christoph Hellwig <hch at lst.de> writes:

> We want to use the dma_direct_ namespace for a generic implementation,
> so rename powerpc to the second best choice: dma_nommu_.

I'm not a fan of "nommu". Some of the users of direct ops *are* using an
IOMMU, they're just setting up a 1:1 mapping once at init time, rather
than mapping dynamically.

Though I don't have a good idea for a better name, maybe "1to1",
"linear", "premapped" ?

cheers