return 0;
 }
 
-static struct file_operations dst_ca_fops = {
+static const struct file_operations dst_ca_fops = {
        .owner = THIS_MODULE,
        .ioctl = dst_ca_ioctl,
        .open = dst_ca_open,
 
        return ret;
 }
 
-static struct file_operations dvb_demux_fops = {
+static const struct file_operations dvb_demux_fops = {
        .owner = THIS_MODULE,
        .read = dvb_demux_read,
        .ioctl = dvb_demux_ioctl,
 
 EXPORT_SYMBOL(dvb_ca_en50221_init);
 
 
-static struct file_operations dvb_ca_fops = {
+static const struct file_operations dvb_ca_fops = {
        .owner = THIS_MODULE,
        .read = dvb_ca_en50221_io_read,
        .write = dvb_ca_en50221_io_write,
 
        return ret;
 }
 
-static struct file_operations dvb_frontend_fops = {
+static const struct file_operations dvb_frontend_fops = {
        .owner          = THIS_MODULE,
        .ioctl          = dvb_generic_ioctl,
        .poll           = dvb_frontend_poll,
 
 }
 
 
-static struct file_operations dvb_net_fops = {
+static const struct file_operations dvb_net_fops = {
        .owner = THIS_MODULE,
        .ioctl = dvb_net_ioctl,
        .open = dvb_generic_open,
 
        dvbdev->fops = dvbdevfops;
        init_waitqueue_head (&dvbdev->wait_queue);
 
-       memcpy(dvbdev->fops, template->fops, sizeof(struct file_operations));
-       dvbdev->fops->owner = adap->module;
+       memcpy(dvbdevfops, template->fops, sizeof(struct file_operations));
+       dvbdevfops->owner = adap->module;
 
        list_add_tail (&dvbdev->list_head, &adap->device_list);
 
 
 
 struct dvb_device {
        struct list_head list_head;
-       struct file_operations *fops;
+       const struct file_operations *fops;
        struct dvb_adapter *adapter;
        int type;
        int minor;
 
 }
 
 
-static struct file_operations dvb_osd_fops = {
+static const struct file_operations dvb_osd_fops = {
        .owner          = THIS_MODULE,
        .ioctl          = dvb_generic_ioctl,
        .open           = dvb_generic_open,
 
  * driver registration
  ******************************************************************************/
 
-static struct file_operations dvb_video_fops = {
+static const struct file_operations dvb_video_fops = {
        .owner          = THIS_MODULE,
        .write          = dvb_video_write,
        .ioctl          = dvb_generic_ioctl,
        .kernel_ioctl   = dvb_video_ioctl,
 };
 
-static struct file_operations dvb_audio_fops = {
+static const struct file_operations dvb_audio_fops = {
        .owner          = THIS_MODULE,
        .write          = dvb_audio_write,
        .ioctl          = dvb_generic_ioctl,
 
        return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
 }
 
-static struct file_operations dvb_ca_fops = {
+static const struct file_operations dvb_ca_fops = {
        .owner          = THIS_MODULE,
        .read           = dvb_ca_read,
        .write          = dvb_ca_write,