On 4/22/21 3:12 PM, Mike Rapoport wrote: > The "generic" pfn_valid() is only available with CONFIG_SPARSEMEM. > With FLATMEM it's wild west: > > $ git grep -w "define pfn_valid" arch/*/include/asm/ | wc -l > 22 > > This would actually mean that we still need arm64::pfn_valid() for the > FLATMEM case. SPARSEMEM would be the only memory model going forward. https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210420093559.23168-1-catalin.marinas@xxxxxxx/
