PGEX_RSV
(frame->tf_err & (PGEX_P | PGEX_U | PGEX_I | PGEX_RSV)) ==
if (frame->tf_err & PGEX_RSV) {
code & PGEX_RSV ? "reserved bits in PTE" :
error_code |= PGEX_RSV;
if (frame->tf_err & PGEX_RSV) {
code & PGEX_RSV ? "reserved bits in PTE" :