pti_user_pagetable_walk_p4d 206 arch/x86/mm/pti.c p4d = pti_user_pagetable_walk_p4d(address); pti_user_pagetable_walk_p4d 423 arch/x86/mm/pti.c user_p4d = pti_user_pagetable_walk_p4d(addr);