--- a/drivers/kcompat.h	2011-03-25 18:28:18.000000000 -0400
+++ b/drivers/kcompat.h	2012-11-27 13:37:55.000000000 -0500
@@ -136,4 +136,9 @@
 )
 #endif
 
+#ifndef err
+#define err(format, arg...)                                     \
+	printk(KERN_ERR KBUILD_MODNAME ": " format "\n", ##arg)
+#endif
+
 #endif /* _KCOMPAT_H */