int snd_ac97_try_bit(ac97_t * ac97, int reg, int bit);
int snd_ac97_remove_ctl(ac97_t *ac97, const char *name, const char *suffix);
int snd_ac97_rename_ctl(ac97_t *ac97, const char *src, const char *dst, const char *suffix);
int snd_ac97_swap_ctl(ac97_t *ac97, const char *s1, const char *s2, const char *suffix);
void snd_ac97_rename_vol_ctl(ac97_t *ac97, const char *src, const char *dst);
int snd_ac97_try_bit(ac97_t * ac97, int reg, int bit);
int snd_ac97_remove_ctl(ac97_t *ac97, const char *name, const char *suffix);
int snd_ac97_rename_ctl(ac97_t *ac97, const char *src, const char *dst, const char *suffix);
int snd_ac97_swap_ctl(ac97_t *ac97, const char *s1, const char *s2, const char *suffix);
void snd_ac97_rename_vol_ctl(ac97_t *ac97, const char *src, const char *dst);