--- zzzz-none-000/linux-4.1.38/include/net/rtnetlink.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/include/net/rtnetlink.h	2020-11-25 10:06:48.000000000 +0000
@@ -17,7 +17,7 @@
 
 static inline int rtnl_msg_family(const struct nlmsghdr *nlh)
 {
-	if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg))
+	if (nlmsg_len(nlh) >= (int)sizeof(struct rtgenmsg))
 		return ((struct rtgenmsg *) nlmsg_data(nlh))->rtgen_family;
 	else
 		return AF_UNSPEC;