-snd_kcontrol_t *snd_ctl_new(snd_kcontrol_t * kcontrol, unsigned int access);
-snd_kcontrol_t *snd_ctl_new1(snd_kcontrol_new_t * kcontrolnew, void * private_data);
-void snd_ctl_free_one(snd_kcontrol_t * kcontrol);
-int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol);
-int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol);
-int snd_ctl_remove_id(snd_card_t * card, snd_ctl_elem_id_t *id);
-int snd_ctl_rename_id(snd_card_t * card, snd_ctl_elem_id_t *src_id, snd_ctl_elem_id_t *dst_id);
-snd_kcontrol_t *snd_ctl_find_numid(snd_card_t * card, unsigned int numid);
-snd_kcontrol_t *snd_ctl_find_id(snd_card_t * card, snd_ctl_elem_id_t *id);
+struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol * kcontrol, unsigned int access);
+struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
+void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
+int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
+int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
+int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
+int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
+struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
+struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);