video_usercopy   3139 drivers/media/v4l2-core/v4l2-ioctl.c 	return video_usercopy(file, cmd, arg, __video_do_ioctl);
video_usercopy    632 drivers/media/v4l2-core/v4l2-subdev.c 	return video_usercopy(file, cmd, arg, subdev_do_ioctl_lock);
video_usercopy    711 include/media/v4l2-ioctl.h long int video_usercopy(struct file *file, unsigned int cmd,