Structure at include/sound/core.h, line 60 References: drivers/hid/hid-prodikeys.c, line 608 drivers/media/usb/go7007/snd-go7007.c, line 194 drivers/usb/gadget/function/f_midi.c, line 803 include/sound/core.h, line 60 include/sound/core.h, line 72 include/sound/core.h, line 315 sound/core/compress_offload.c, line 1170 sound/core/control.c, line 2211 sound/core/device.c, line 30 sound/core/jack.c, line 493 sound/core/pcm.c, line 709 sound/core/pcm.c, line 714 sound/core/rawmidi.c, line 1766 sound/core/timer.c, line 940 sound/pci/ac97/ac97_codec.c, line 1964 sound/pci/ac97/ac97_codec.c, line 2066 sound/pci/hda/hda_codec.c, line 931 sound/pci/hda/hda_intel.c, line 1760 sound/pci/hda/hda_tegra.c, line 389 sound/spi/at73c213.c, line 877 sound/usb/mixer.c, line 3519