Mostly, it adds my slice infrastructure that I posted a few times
before, rebased for the current code, and along with it, support
for 64K pages mapping of SPE local stores on 4K kernel
There's also a bug fix & cleanup for the segment demotion and my
modified version of Hugh Dickins patch to stop using SLAB for
PTE pages.
-DO NOT MERGE JUST YET-
I still want to torture it a bit as I just rebased it now that all of
the get_unmapped_area changes are finally upstream.
Hopefully, I'll give you an Ack tomorrow.