Function prototype or declaration at include/sound/control.h, line 131 References: drivers/media/pci/saa7134/saa7134-alsa.c, line 472 drivers/media/pci/saa7134/saa7134-alsa.c, line 477 drivers/platform/x86/thinkpad_acpi.c, line 7544 drivers/platform/x86/thinkpad_acpi.c, line 7548 drivers/usb/gadget/function/u_audio.c, line 674 drivers/usb/gadget/function/u_audio.c, line 723 include/sound/control.h, line 131 sound/core/control.c, line 148 sound/core/control.c, line 188 sound/core/control.c, line 208 sound/core/oss/mixer_oss.c, line 647 sound/core/oss/mixer_oss.c, line 694 sound/core/oss/mixer_oss.c, line 894 sound/drivers/aloop.c, line 352 sound/drivers/aloop.c, line 357 sound/drivers/aloop.c, line 362 sound/drivers/aloop.c, line 372 sound/pci/cmipci.c, line 1131 sound/pci/cmipci.c, line 1167 sound/pci/es1938.c, line 1652 sound/pci/es1938.c, line 1653 sound/pci/es1938.c, line 1655 sound/pci/es1938.c, line 1657 sound/pci/hda/patch_hdmi.c, line 1602 sound/pci/maestro3.c, line 1576 sound/pci/rme32.c, line 880 sound/pci/rme32.c, line 1008 sound/pci/rme96.c, line 1214 sound/pci/rme96.c, line 1337 sound/pci/rme9652/hdsp.c, line 4544 sound/pci/rme9652/hdsp.c, line 4563 sound/pci/rme9652/hdspm.c, line 4654 sound/pci/rme9652/rme9652.c, line 2288 sound/pci/rme9652/rme9652.c, line 2305 sound/pci/sonicvibes.c, line 659 sound/pci/sonicvibes.c, line 660 sound/soc/codecs/ak4118.c, line 283 sound/soc/codecs/hdac_hdmi.c, line 1325 sound/soc/codecs/wm_adsp.c, line 2080 sound/soc/fsl/fsl_xcvr.c, line 188 sound/usb/midi.c, line 1096 sound/usb/midi.c, line 1113 sound/usb/mixer.c, line 1358 sound/usb/mixer.c, line 3307 sound/usb/mixer.c, line 3408 sound/usb/mixer_scarlett_gen2.c, line 1965 sound/usb/mixer_scarlett_gen2.c, line 1968 sound/usb/mixer_scarlett_gen2.c, line 2606 sound/usb/mixer_scarlett_gen2.c, line 2632 sound/usb/mixer_scarlett_gen2.c, line 2931 sound/usb/mixer_scarlett_gen2.c, line 3691 sound/usb/mixer_scarlett_gen2.c, line 3713 sound/usb/mixer_scarlett_gen2.c, line 3718 sound/usb/mixer_scarlett_gen2.c, line 3740 sound/usb/mixer_scarlett_gen2.c, line 3745 sound/usb/mixer_scarlett_gen2.c, line 3761 sound/usb/mixer_scarlett_gen2.c, line 3764 sound/usb/mixer_scarlett_gen2.c, line 3767 sound/usb/mixer_scarlett_gen2.c, line 3770 sound/usb/mixer_scarlett_gen2.c, line 3787 sound/usb/mixer_scarlett_gen2.c, line 3793 sound/usb/mixer_scarlett_gen2.c, line 3797 sound/usb/mixer_scarlett_gen2.c, line 3812