atomic_set(&channel_wqs[i].in_open, 0);
                mutex_init(&channel_wqs[i].mutex);
 
-               dev = device_create(mt_class, NULL, MKDEV(major, i),
-                                   "%s%d", module_name, i);
+               dev = device_create_drvdata(mt_class, NULL, MKDEV(major, i),
+                                           NULL, "%s%d", module_name, i);
                if (IS_ERR(dev)) {
                        err = PTR_ERR(dev);
                        goto out_chrdev;
 
 
        tb_class = tbc;
 
-       dev = device_create(tbc, NULL, MKDEV(SBPROF_TB_MAJOR, 0), "tb");
+       dev = device_create_drvdata(tbc, NULL, MKDEV(SBPROF_TB_MAJOR, 0),
+                                   NULL, "tb");
        if (IS_ERR(dev)) {
                err = PTR_ERR(dev);
                goto out_class;