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))