M_TTYS
consbufp = malloc(CONSBUFSIZE, M_TTYS, M_WAITOK | M_ZERO);
tp = malloc(sizeof(struct tty), M_TTYS, M_WAITOK|M_ZERO);
free(tp, M_TTYS, sizeof(*tp));
clp->c_cs = malloc(size, M_TTYS, M_WAITOK|M_ZERO);
clp->c_cq = malloc(QMEM(size), M_TTYS, M_WAITOK|M_ZERO);
free(clp->c_cs, M_TTYS, clp->c_cn);
free(clp->c_cq, M_TTYS, QMEM(clp->c_cn));