--- zzzz-none-000/linux-4.1.52/include/net/checksum.h	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/include/net/checksum.h	2022-03-02 11:37:13.000000000 +0000
@@ -94,7 +94,7 @@
 }
 
 static inline __wsum
-csum_block_add_ext(__wsum csum, __wsum csum2, int offset, int len)
+csum_block_add_ext(__wsum csum, __wsum csum2, int offset, int len __maybe_unused)
 {
 	return csum_block_add(csum, csum2, offset);
 }