FOLL_POPULATE     634 mm/gup.c       	if ((*flags & (FOLL_POPULATE | FOLL_MLOCK)) == FOLL_MLOCK)
FOLL_POPULATE    1216 mm/gup.c       	gup_flags = FOLL_TOUCH | FOLL_POPULATE | FOLL_MLOCK;
FOLL_POPULATE    1218 mm/gup.c       		gup_flags &= ~FOLL_POPULATE;