--- zzzz-none-000/linux-4.1.38/include/linux/ipv6.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/include/linux/ipv6.h	2020-11-25 10:06:48.000000000 +0000
@@ -310,12 +310,14 @@
 	return NULL;
 }
 
+#if !defined(CONFIG_BCM_MPTCP) || !defined(CONFIG_BCM_KF_MPTCP)
 static inline struct inet6_request_sock *
 			inet6_rsk(const struct request_sock *rsk)
 {
 	return NULL;
 }
 
+#endif
 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 {
 	return NULL;