[PATCH -v2 00/10] Rewrite Motorola MMU page-table layout

[Peter Zijlstra]

Hi!

In order to faciliate Will's READ_ONCE() patches:

  https://lkml.kernel.org/r/20200123153341.19947-1-will@xxxxxxxxxx

we need to fix m68k/motorola to not have a giant pmd_t. These patches do so and
are tested using ARAnyM/68040.

Michael tested the previous version on his Atari Falcon/68030.

Build tested for sun3/coldfire.

Please consider!

Changes since -v1:
 - fixed sun3/coldfire build issues
 - unified motorola mmu page setup
 - added enum to table allocator
 - moved pointer table allocator to motorola.c
 - converted coldfire pgtable_t
 - fixed coldfire pgd_alloc
 - fixed coldfire nocache

---
 arch/m68k/include/asm/mcf_pgalloc.h      |  31 ++---
 arch/m68k/include/asm/motorola_pgalloc.h |  74 ++++------
 arch/m68k/include/asm/motorola_pgtable.h |  36 +++--
 arch/m68k/include/asm/page.h             |  16 ++-
 arch/m68k/include/asm/pgtable_mm.h       |  10 +-
 arch/m68k/mm/init.c                      |  34 +++--
 arch/m68k/mm/kmap.c                      |  36 +++--
 arch/m68k/mm/memory.c                    | 103 --------------
 arch/m68k/mm/motorola.c                  | 228 +++++++++++++++++++++++++------
 9 files changed, 302 insertions(+), 266 deletions(-)