[PATCH 0/3] arm64: Add support for PUD THP

This series adds PUD THP support for arm64, enabling PUD THP for DAX
and pfnmap.

Patch 1 moves the identical pudp_invalidate() implementations from x86
and riscv to a generic location so arm64 can reuse it.

Patch 2 is a minor cleanup that simplifies pmd_special/pmd_mkspecial.

Patch 3 adds the necessary PUD page table helpers and selects
HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD.

Jinjiang Tu (3):
  mm: define generic pudp_invalidate() implementation
  arm64: simplify pmd_special and pmd_mkspecial
  arm64: Add support for PUD THP

 arch/arm64/Kconfig                           |  1 +
 arch/arm64/include/asm/pgtable.h             | 71 +++++++++++++++-----
 arch/powerpc/include/asm/book3s/64/pgtable.h |  1 +
 arch/riscv/include/asm/pgtable.h             |  3 -
 arch/riscv/mm/pgtable.c                      |  9 ---
 arch/x86/include/asm/pgtable.h               |  3 -
 arch/x86/mm/pgtable.c                        | 12 ----
 include/linux/pgtable.h                      |  7 ++
 mm/pgtable-generic.c                         | 14 ++++
 9 files changed, 77 insertions(+), 44 deletions(-)

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2.43.0