Index: uspace/lib/ext4/src/ops.c
===================================================================
--- uspace/lib/ext4/src/ops.c	(revision 28a5ebdea900783081bd23e40f685b6b0479c63d)
+++ uspace/lib/ext4/src/ops.c	(revision 01e9991a00c21784a68aecc730376c43f47c81fb)
@@ -810,15 +810,14 @@
 }
 
-/** Extract device identifier from node.
+/** Get service ID for a service-special file.
  *
  * @param node Node to extract id from
  *
- * @return id of device, where is the filesystem
+ * @return Service ID for a service-special file, zero for a regular file.
  *
  */
 service_id_t ext4_service_get(fs_node_t *fn)
 {
-	ext4_node_t *enode = EXT4_NODE(fn);
-	return enode->instance->service_id;
+	return 0;
 }