Re: [PATCH 1/2] mm: provide a sane PTE walking API for modules

[Christoph Hellwig]

On Mon, Feb 08, 2021 at 07:18:56PM +0100, Paolo Bonzini wrote:
> Fair enough.  I would expect that pretty much everyone using follow_pfn will
> at least want to switch to this one (as it's less bad and not impossible to
> use correctly), but I'll squash this in:


Daniel looked into them, so he may correct me, but the other follow_pfn
users and their destiny are:

 - SGX, which is not modular and I think I just saw a patch to kill them
 - v4l videobuf and frame vector: I think those are going away
   entirely as they implement a rather broken pre-dmabuf P2P scheme
 - vfio: should use MMU notifiers eventually

Daniel, what happened to your follow_pfn series?