Index: uspace/lib/c/include/adt/list.h
===================================================================
--- uspace/lib/c/include/adt/list.h	(revision cf02eaf20ca2a7fcb7eb5934b972b18b7bc1e6a3)
+++ uspace/lib/c/include/adt/list.h	(revision 82721f53a8a40d533716c30cbb5a4661d886bef6)
@@ -1,5 +1,5 @@
 /*
  * Copyright (c) 2001-2004 Jakub Jermar
- * Copyright (c) 2011 Jiri Svoboda
+ * Copyright (c) 2013 Jiri Svoboda
  * All rights reserved.
  *
@@ -65,5 +65,5 @@
 
 #define list_get_instance(link, type, member) \
-	((type *) (((void *)(link)) - ((void *) &(((type *) NULL)->member))))
+	((type *) (((void *)(link)) - list_link_to_void(&(((type *) NULL)->member))))
 
 #define list_foreach(list, iterator) \
@@ -318,4 +318,13 @@
 }
 
+/** Verify that argument type is a pointer to link_t (at compile time).
+ *
+ * This can be used to check argument type in a macro.
+ */
+static inline const void *list_link_to_void(const link_t *link)
+{
+	return link;
+}
+
 extern int list_member(const link_t *, const list_t *);
 extern void list_concat(list_t *, list_t *);