--- zzzz-none-000/linux-3.10.107/include/linux/sysfs.h	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/include/linux/sysfs.h	2021-11-10 11:53:56.000000000 +0000
@@ -79,6 +79,23 @@
 	.show	= _name##_show,					\
 }
 
+/* AVM: backport from 3.15
+ *
+ * commit:
+ * a65fcce75a75c0d41b938f86d09d42b6f1733309 sysfs: create __ATTR_WO()
+ */
+#define __ATTR_WO(_name) {                                             \
+       .attr   = { .name = __stringify(_name), .mode = S_IWUSR },      \
+       .store  = _name##_store,                                        \
+}
+
+/* AVM: backport from 3.15
+ *
+ * commit:
+ * b9b3259746d77f4fcb786e2a43c25bcc40773755 sysfs.h: add __ATTR_RW() macro
+ */
+#define __ATTR_RW(_name) __ATTR(_name, 0644, _name##_show, _name##_store)
+
 #define __ATTR_NULL { .attr = { .name = NULL } }
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC