On Fri, Aug 31, 2018 at 04:19:43PM +0100, James Morse wrote: > include/linux/mmzone.h describes ARCH_HAS_HOLES_MEMORYMODEL as > relevant when parts the memmap have been free()d. This would > happen on systems where memory is smaller than a sparsemem-section, > and the extra struct pages are expensive. pfn_valid() on these > systems returns true for the whole sparsemem-section, so an extra > memmap_valid_within() check is needed. > > On arm64 we have nomap memory, so always provide pfn_valid() to test > for nomap pages. This means ARCH_HAS_HOLES_MEMORYMODEL's extra checks > are already rolled up into pfn_valid(). > > Remove it. > > Signed-off-by: James Morse <james.morse@xxxxxxx> > --- > arch/arm64/Kconfig | 5 +---- > arch/arm64/include/asm/page.h | 2 -- > arch/arm64/mm/init.c | 2 -- > 3 files changed, 1 insertion(+), 8 deletions(-) Acked-by: Will Deacon <will.deacon@xxxxxxx> Will
