turn hmm migrate_vma upside down v3

[Jason Gunthorpe]

On Fri, Aug 16, 2019 at 08:51:41AM +0200, Christoph Hellwig wrote:
> Jason,
> 
> are you going to look into picking this up?  Unfortunately there is
> a hole pile in this area still pending, including the kvmppc secure
> memory driver from Bharata that depends on the work.
> 
> mm folks:  migrate.c is mostly a classic MM file except for the hmm
> additions.  Do you want to also look over this or just let it pass?

Yes, after you explained the functions were hmm ones, it seems OK to
go to hmm.git.

I was waiting for the dust to settle, I see Ralph tested-by, are we
good now?

Jason