Re: [PATCH v8 10/10] mm: Renumber FOLL_PIN and FOLL_GET down

[Jason Gunthorpe]

On Tue, Jan 24, 2023 at 02:27:53PM +0000, David Howells wrote:
> Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:
> 
> > My point was to change that to take a 'bool unpin' because FOLL_PIN is
> > not to be used outside gup.c
> 
> I need a 3-state wrapper.  But if I can't do it in gup.c, then I'll have to do
> it elsewhere.  As Christoph says, most of the places will only be pinned or
> not-pinned.  The whole point was to avoid generating new constants when
> existing constants would do.

What is the 3rd state?

Jason