mdesc
struct mdesc *md, *md0;
sc->mdt[ch] = kmalloc(sizeof(struct mdesc) * nmd, M_MUSYCC, M_WAITOK);
sc->mdr[ch] = kmalloc(sizeof(struct mdesc) * nmd, M_MUSYCC, M_WAITOK);
struct mdesc *snext;
struct mdesc *tx_next_md; /* next MD */
struct mdesc *tx_last_md; /* last MD */
struct mdesc *mdt[NHDLC];
struct mdesc *mdr[NHDLC];
struct mdesc *md;
struct mdesc *md;