diff -u linux-2.6.17.3-vs2.1.1-rc25.2/kernel/vserver/namespace.c linux-2.6.17.3-vs2.1.1-rc25.2/kernel/vserver/namespace.c
--- linux-2.6.17.3-vs2.1.1-rc25.2/kernel/vserver/namespace.c	2006-07-08 23:39:25 +0200
+++ linux-2.6.17.3-vs2.1.1-rc25.2/kernel/vserver/namespace.c	2006-07-08 23:39:25 +0200
@@ -87,6 +87,7 @@
 	return ret;
 }
 
+#if 0
 int vc_cleanup_namespace(uint32_t id, void __user *data)
 {
 	// down_write(&current->namespace->sem);
@@ -96,6 +97,7 @@
 	// up_write(&current->namespace->sem);
 	return 0;
 }
+#endif
 
 int vc_set_namespace(uint32_t id, void __user *data)
 {
only in patch2:
unchanged:
--- linux-2.6.17.3-vs2.1.1-rc25.1/kernel/vserver/switch.c	2006-06-18 05:15:02 +0200
+++ linux-2.6.17.3-vs2.1.1-rc25.2/kernel/vserver/switch.c	2006-07-08 22:53:06 +0200
@@ -124,8 +124,10 @@ long do_vserver(uint32_t cmd, uint32_t i
 	/* this is version 1 */
 	case VCMD_set_namespace:
 		return vc_set_namespace(id, data);
+#if 0
 	case VCMD_cleanup_namespace:
 		return vc_cleanup_namespace(id, data);
+#endif
 	}
 
 	/* those are allowed while in setup too */