diff --git a/[refs] b/[refs]
index 6603d24edbab..74fe04655f86 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e57940d719e9fc5223d133b631f8cb5232d6064e
+refs/heads/master: f567a18590742b811287b7512fb0908deac4eef7
diff --git a/trunk/include/linux/sem.h b/trunk/include/linux/sem.h
index 464842621a4a..10d6b226afc5 100644
--- a/trunk/include/linux/sem.h
+++ b/trunk/include/linux/sem.h
@@ -96,16 +96,21 @@ struct sem_array {
 	int			complex_count;	/* pending complex operations */
 };
 
+#ifdef CONFIG_SYSVIPC
+
 struct sysv_sem {
 	struct sem_undo_list *undo_list;
 };
 
-#ifdef CONFIG_SYSVIPC
-
 extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk);
 extern void exit_sem(struct task_struct *tsk);
 
 #else
+
+struct sysv_sem {
+	/* empty */
+};
+
 static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk)
 {
 	return 0;