[PATCH 0/2] arm64/mm: Fix pfn_valid() for ZONE_DEVICE based memory

[Anshuman Khandual]

This series fixes pfn_valid() for ZONE_DEVICE based memory and also improves
its performance for normal hotplug memory. While here, it also reorganizes
pfn_valid() on CONFIG_SPARSEMEM. This series is based on v5.11-rc5.

Question - should pfn_section_valid() be tested both for boot and non boot
memory as well ?

Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: Robin Murphy <robin.murphy@xxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

Changes in V1:

- Test pfn_section_valid() for non boot memory

Changes in RFC:

https://lore.kernel.org/linux-arm-kernel/1608621144-4001-1-git-send-email-anshuman.khandual@xxxxxxx/

Anshuman Khandual (2):
  arm64/mm: Fix pfn_valid() for ZONE_DEVICE based memory
  arm64/mm: Reorganize pfn_valid()

 arch/arm64/mm/init.c | 46 +++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 41 insertions(+), 5 deletions(-)

-- 
2.20.1