SECTION_NR_TO_ROOT 1241 include/linux/mmzone.h if (!mem_section[SECTION_NR_TO_ROOT(nr)]) SECTION_NR_TO_ROOT 1243 include/linux/mmzone.h return &mem_section[SECTION_NR_TO_ROOT(nr)][nr & SECTION_ROOT_MASK]; SECTION_NR_TO_ROOT 85 mm/sparse.c unsigned long root = SECTION_NR_TO_ROOT(section_nr);