memmap_valid_within  196 fs/proc/kcore.c 	if (!memmap_valid_within(pfn, p, page_zone(p)))
memmap_valid_within 1443 include/linux/mmzone.h bool memmap_valid_within(unsigned long pfn,
memmap_valid_within 1448 mm/vmstat.c    		if (!memmap_valid_within(pfn, page, zone))