video_mbuf        266 include/linux/videodev.h #define VIDIOCGMBUF		_IOR('v',20, struct video_mbuf)		/* Memory map buffer info */
video_mbuf        115 include/media/v4l2-ioctl.h 	int (*vidiocgmbuf)  (struct file *file, void *fh, struct video_mbuf *p);