_snd_ctl_add_follower
int _snd_ctl_add_follower(struct snd_kcontrol *master,
return _snd_ctl_add_follower(master, follower, 0);
return _snd_ctl_add_follower(master, follower, SND_CTL_FOLLOWER_NEED_UPDATE);
EXPORT_SYMBOL(_snd_ctl_add_follower);