--- zzzz-none-000/linux-2.6.32.61/fs/fcntl.c	2013-06-10 09:43:48.000000000 +0000
+++ virian-300e-630/linux-2.6.32.61/fs/fcntl.c	2011-07-20 07:23:51.000000000 +0000
@@ -141,6 +141,7 @@
 	}
 	return ret;
 }
+EXPORT_SYMBOL(sys_dup);
 
 #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)