ac97_alloc
ac = ac97_alloc(dip, rd, wr, priv);
statep->ac97 = ac97_alloc(dip, audio1575_read_ac97,
statep->ac97 = ac97_alloc(dip, audio810_read_ac97, audio810_write_ac97,
devc->ac97 = ac97_alloc(dip, cmediahd_read_ac97,
devc->fp_ac97 = ac97_alloc(dip, cmediahd_read_fp_ac97,
dev->ac97 = ac97_alloc(dev->dip, audioens_rd97, audioens_wr97, dev);
statep->ac97 = ac97_alloc(dip, audioixp_rd97, audioixp_wr97, statep);
state->ts_ac97 = ac97_alloc(dip, audiots_get_ac97,
devc->ac97 = ac97_alloc(dip, auvia_read_ac97, auvia_write_ac97, devc);
ac97_t *ac97_alloc(dev_info_t *, ac97_rd_t, ac97_wr_t, void *);