-static void snd_opl4_do_for_channel(opl4_t *opl4, snd_midi_channel_t *chan,
- void (*func)(opl4_t *opl4, opl4_voice_t *voice))
+static void snd_opl4_do_for_channel(struct snd_opl4 *opl4,
+ struct snd_midi_channel *chan,
+ void (*func)(struct snd_opl4 *opl4, struct opl4_voice *voice))