pgdat_page_nr     554 include/linux/mmzone.h #define pgdat_page_nr(pgdat, pagenr)	((pgdat)->node_mem_map + (pagenr))
pgdat_page_nr     556 include/linux/mmzone.h #define pgdat_page_nr(pgdat, pagenr)	pfn_to_page((pgdat)->node_start_pfn + (pagenr))