[PATCH 0/4] Rework sparc32 page-table layout

[Will Deacon]

Hi folks,

This series of patches reworks the sparc32 page-table layout so that
'pmd_t' no longer embeds an array of 16 physical pointers, which means
that we can finally enforce atomicity for accesses made using READ_ONCE():

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

I've tested this with QEMU by booting Debian Etch. Please take a look!

Cheers,

Will

Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx

--->8

Will Deacon (4):
  sparc32: mm: Fix argument checking in __srmmu_get_nocache()
  sparc32: mm: Restructure sparc32 MMU page-table layout
  sparc32: mm: Change pgtable_t type to pte_t * instead of struct page *
  sparc32: mm: Reduce allocation size for PMD and PTE tables

 arch/sparc/include/asm/page_32.h    | 12 ++--
 arch/sparc/include/asm/pgalloc_32.h | 11 ++--
 arch/sparc/include/asm/pgtable_32.h | 40 +++++++-----
 arch/sparc/include/asm/pgtsrmmu.h   | 36 +----------
 arch/sparc/include/asm/viking.h     |  5 +-
 arch/sparc/kernel/head_32.S         |  8 +--
 arch/sparc/mm/hypersparc.S          |  3 +-
 arch/sparc/mm/srmmu.c               | 95 ++++++++++-------------------
 arch/sparc/mm/viking.S              |  5 +-
 9 files changed, 85 insertions(+), 130 deletions(-)

-- 
2.20.1