WMESGLEN
{"wchan", "WCHAN", NULL, LJUST, wchan, NULL, WMESGLEN, 0, 0, NULL, NULL},
strncpy(kl->kl_wmesg, lwp->lwp_thread->td_wmesg, WMESGLEN);
kl->kl_wmesg[WMESGLEN] = 0;
strncpy(kp->kp_lwp.kl_wmesg, td->td_wmesg, WMESGLEN);
kp->kp_lwp.kl_wmesg[WMESGLEN] = 0;
char kl_wmesg[WMESGLEN+1]; /* waiting message */