SNDRV_CTL_IOCTL_ELEM_UNLOCK 1538 sound/core/control.c case SNDRV_CTL_IOCTL_ELEM_UNLOCK: SNDRV_CTL_IOCTL_ELEM_UNLOCK 450 sound/core/control_compat.c case SNDRV_CTL_IOCTL_ELEM_UNLOCK: