--- zzzz-none-000/linux-2.6.39.4/include/net/rtnetlink.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/include/net/rtnetlink.h	2021-11-10 13:23:10.000000000 +0000
@@ -16,7 +16,7 @@
 
 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;