SNDCTL_DSP_NONBLOCK  694 fs/compat_ioctl.c COMPATIBLE_IOCTL(SNDCTL_DSP_NONBLOCK)
SNDCTL_DSP_NONBLOCK  682 include/uapi/linux/soundcard.h #define SOUND_PCM_NONBLOCK		SNDCTL_DSP_NONBLOCK
SNDCTL_DSP_NONBLOCK 2664 sound/core/oss/pcm_oss.c 	case SNDCTL_DSP_NONBLOCK: