hmm_range_fault related fixes and legacy API removal v2

[Jason Gunthorpe]

On Wed, Jul 03, 2019 at 03:02:08PM -0700, Christoph Hellwig wrote:
> Hi Jérôme, Ben and Jason,
> 
> below is a series against the hmm tree which fixes up the mmap_sem
> locking in nouveau and while at it also removes leftover legacy HMM APIs
> only used by nouveau.

As much as I like this series, it won't make it to this merge window,
sorry.

Let's revisit it in a few weeks at rc1.

Regards,
Jason