PGEX_U
code & PGEX_U ? "user" : "supervisor",
(frame->tf_err & (PGEX_P | PGEX_U | PGEX_I | PGEX_RSV)) == PGEX_P &&
#define CLKF_USERMODE(framep) ((framep)->if_xflags & PGEX_U)
frame->if_xflags |= PGEX_U;