DTRACE_C_UNODEF
uint_t unodef = pcb->pcb_cflags & DTRACE_C_UNODEF;
{ "udefs", dt_opt_invcflags, DTRACE_C_UNODEF },
{ "unodefs", dt_opt_cflags, DTRACE_C_UNODEF },
dtj_flag(flags, DTRACE_C_UNODEF, get, set);