This patch has been created from AVM's opensrc packages:

    diff -durN --no-dereference 6660.07.20 6660.07.21  > this.patch

--- linux-4.9/.kernelvariables	2020-08-17 19:14:05.000000000 +0200
+++ linux-4.9/.kernelvariables	2020-10-15 09:35:52.000000000 +0200
@@ -1,6 +1,6 @@
 # vim: set autoread filetype=make:
 #
-# Auto-generated at build-81215
+# Auto-generated at build-80781
 # while generating for Fritz_Box_HW252x
 #
 ARCH = x86