for_each_present_section_nr 542 mm/sparse.c for_each_present_section_nr(pnum_begin, pnum) { for_each_present_section_nr 565 mm/sparse.c for_each_present_section_nr(pnum_begin, pnum) { for_each_present_section_nr 588 mm/sparse.c for_each_present_section_nr(pnum_begin + 1, pnum_end) {