--- zzzz-none-000/linux-2.6.32.61/include/linux/sysfs.h	2013-06-10 09:43:48.000000000 +0000
+++ ar9-7330-650/linux-2.6.32.61/include/linux/sysfs.h	2014-08-12 13:03:17.000000000 +0000
@@ -56,6 +56,14 @@
 	.show	= _name##_show,					\
 }
 
+#define __ATTR_WO(_name) {                                              \
+        .attr   = { .name = __stringify(_name), .mode = S_IWUSR },      \
+        .store  = _name##_store,                                        \
+}
+
+#define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO),             \
+                         _name##_show, _name##_store)
+
 #define __ATTR_NULL { .attr = { .name = NULL } }
 
 #define attr_name(_attr) (_attr).attr.name