SNDRV_RAWMIDI_IOCTL_DRAIN 811 sound/core/rawmidi.c case SNDRV_RAWMIDI_IOCTL_DRAIN: SNDRV_RAWMIDI_IOCTL_DRAIN 152 sound/core/rawmidi_compat.c case SNDRV_RAWMIDI_IOCTL_DRAIN: