clean up address limit helpers

[Christoph Hellwig]

On Fri, Jul 10, 2020 at 08:25:35AM -0700, Linus Torvalds wrote:
> On Fri, Jul 10, 2020 at 6:57 AM Christoph Hellwig <hch at lst.de> wrote:
> >
> > in preparation for eventually phasing out direct use of set_fs(), this
> > series removes the segment_eq() arch helper that is only used to
> > implement or duplicate the uaccess_kernel() API, and then adds
> > descriptive helpers to force the kernel address limit.
> 
> Ack. All the patches looked like no-ops to me, but with better naming
> and clarity.

Is that a formal Acked-by?