[Nouveau] turn hmm migrate_vma upside down v3

[Christoph Hellwig]

On Wed, Aug 14, 2019 at 05:09:54PM -0700, Ralph Campbell wrote:
> Some of the patches seem to have been mangled in the mail.

Weird, I never had such a an issue with git-send-email.

But to be covered for such weird cases I also posted a git url
for exactly the tree I've been working on.

> I was able to edit them and apply to Jason's tree
> https://github.com/jgunthorpe/linux.git mmu_notifier branch.
> So for the series you can add:
>
> Tested-by: Ralph Campbell <rcampbell at nvidia.com>

Thanks!