clean up address limit helpers v2

[Andrew Morton]

On Tue, 14 Jul 2020 12:54:59 +0200 Christoph Hellwig <hch at lst.de> wrote:

> Hi all,
> 
> 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.
> 
> 
> Changes since v1:
>  - drop to incorrect hunks
>  - fix a commit log typo

I think this *is* v1.  I can't find any differences in the patches and I
was unable to eyeball any changelog alterations?