[Nouveau] dev_pagemap related cleanups v2

[Christoph Hellwig]

On Tue, Jun 18, 2019 at 12:47:10PM -0700, Dan Williams wrote:
> > Git tree:
> >
> >     git://git.infradead.org/users/hch/misc.git hmm-devmem-cleanup.2
> >
> > Gitweb:
> >
> >     http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/hmm-devmem-cleanup.2

> 
> Attached is my incremental fixups on top of this series, with those
> integrated you can add:

I've folded your incremental bits in and pushed out a new
hmm-devmem-cleanup.3 to the repo above.  Let me know if I didn't mess
up anything else.  I'll wait for a few more comments and Jason's
planned rebase of the hmm branch before reposting.