new_p4d_page 183 arch/x86/mm/pti.c unsigned long new_p4d_page = __get_free_page(gfp); new_p4d_page 184 arch/x86/mm/pti.c if (WARN_ON_ONCE(!new_p4d_page)) new_p4d_page 187 arch/x86/mm/pti.c set_pgd(pgd, __pgd(_KERNPG_TABLE | __pa(new_p4d_page)));