struct dmxdev_filter *dmxdevfilter = dvb_dmxdev_file_to_filter(file);
struct dmxdev_filter *dmxdevfilter = file->private_data;
static int dvb_demux_release(struct inode *inode, struct file *file){	struct dmxdev_filter *dmxdevfilter = dvb_dmxdev_file_to_filter(file);	struct dmxdev *dmxdev = dmxdevfilter->dev;	return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);}