[Nouveau] [PATCH 21/22] mm: remove the HMM config option

[Jason Gunthorpe]

On Thu, Jun 13, 2019 at 11:43:24AM +0200, Christoph Hellwig wrote:
> All the mm/hmm.c code is better keyed off HMM_MIRROR.  Also let nouveau
> depend on it instead of the mix of a dummy dependency symbol plus the
> actually selected one.  Drop various odd dependencies, as the code is
> pretty portable.

I don't really know, but I thought this needed the arch restriction
for the same reason get_user_pages has various unique arch specific
implementations (it does seem to have some open coded GUP like thing)?

I was hoping we could do this after your common gup series? But sooner
is better too.

Jason