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-rw-r--r--sound/usb/mixer.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index b4a2c8165e4b..459551ac53ae 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -55,4 +55,7 @@ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer);
int snd_usb_mixer_activate(struct usb_mixer_interface *mixer);
+int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
+ struct snd_kcontrol *kctl);
+
#endif /* __USBMIXER_H */