On Tue, May 25, 2021 at 06:25:49PM +0530, Anshuman Khandual wrote:

CONFIG_SPARSEMEM_VMEMMAP is now the only available memory model on arm64
platforms and free_unused_memmap() would just return without creating any
holes in the memmap mapping. There is no need for any special handling in
pfn_valid() and HAVE_ARCH_PFN_VALID can just be dropped. This also moves
the pfn upper bits sanity check into generic pfn_valid().

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <redacted>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Acked-by: Mike Rapoport <redacted>
Acked-by: David Hildenbrand <redacted>
Signed-off-by: Anshuman Khandual <redacted>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>