--- zzzz-none-000/linux-3.10.107/net/core/rtnetlink.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/net/core/rtnetlink.c	2021-11-10 11:53:56.000000000 +0000
@@ -34,6 +34,7 @@
 #include <linux/init.h>
 #include <linux/security.h>
 #include <linux/mutex.h>
+#include <linux/rwsem.h>
 #include <linux/if_addr.h>
 #include <linux/if_bridge.h>
 #include <linux/pci.h>
@@ -60,6 +61,45 @@
 	rtnl_calcit_func 	calcit;
 };
 
+#if IS_ENABLED(CONFIG_AVM_RTNETLINK_ENHANCEMENT)
+static DECLARE_RWSEM(rtnl_offload_rwsem);
+
+void rtnl_offload_read_lock(void)
+{
+    down_read(&rtnl_offload_rwsem);
+}
+EXPORT_SYMBOL(rtnl_offload_read_lock);
+
+void rtnl_offload_read_unlock(void)
+{
+    up_read(&rtnl_offload_rwsem);
+}
+EXPORT_SYMBOL(rtnl_offload_read_unlock);
+
+
+void rtnl_offload_write_lock(void)
+{
+    down_write(&rtnl_offload_rwsem);
+}
+EXPORT_SYMBOL(rtnl_offload_write_lock);
+
+void rtnl_offload_write_unlock(void)
+{
+    up_write(&rtnl_offload_rwsem);
+}
+EXPORT_SYMBOL(rtnl_offload_write_unlock);
+
+void (*wait_for_link_to_offload_cpu_hook)(void) = NULL;
+EXPORT_SYMBOL(wait_for_link_to_offload_cpu_hook);
+
+void wait_for_link_to_offload_cpu(void){
+   if(wait_for_link_to_offload_cpu_hook != NULL)
+      wait_for_link_to_offload_cpu_hook();
+}
+#endif /* CONFIG_AVM_RTNETLINK_ENHANCEMENT */
+
+// ---------------------------------
+
 static DEFINE_MUTEX(rtnl_mutex);
 
 void rtnl_lock(void)