Excerpts from Christophe Leroy's message of November 22, 2021 6:48 pm:
This series converts powerpc to default topdown mmap layout.
powerpc provides its own arch_get_unmapped_area() only when
slices are needed, which is only for book3s/64. First part of
the series moves slices into book3s/64 specific directories
and cleans up other subarchitectures.
Then a small modification is done to core mm to allow
powerpc to still provide its own arch_randomize_brk()
Last part converts to default topdown mmap layout.
A nice series but will clash badly with the CONFIG_HASH_MMU
series of course. One will have to be rebased if they are
both to be merged.