Hi Christoph,

On Fri, 28 Jun 2019 08:59:46 -0700
Christoph Hellwig [off-list ref] wrote:

I'd much rather bite the bullet and make dev->dma_mask a scalar
instead of a pointer.  The pointer causes way to much boiler plate code,
and the semantics are way to subtile.

I agree that this the real solution, it just seemed a bit overwhelming
to me. I'll be happy to help with this though, now that you took a big
first step.

Below is a POV patch that
compiles and boots with my usual x86 test config, and at least compiles
with the arm and pmac32 defconfigs.  It probably breaks just about
everything else, but should give us an idea what is involve in the
switch:

I'll test that on my boards too.

Thanks,

Maxime

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