Modern gcc's don't like labels without a statement.

Add empty statements to avoid warning.

net/ipv4/arp.c

@@ -1172,6 +1172,7 @@ static struct neighbour *neigh_get_next(struct seq_file *seq,
 		n = n->next;
 		/* Don't confuse "arp -a" w/ magic entries */
 try_again:
+		;
 	} while (n && !(n->nud_state & ~NUD_NOARP));
 
 	if (n)

net/ipv4/raw.c

@@ -715,6 +715,7 @@ static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk)
 	do {
 		sk = sk->next;
 try_again:
+		;
 	} while (sk && sk->family != PF_INET);
 
 	if (!sk && ++state->bucket < RAWV4_HTABLE_SIZE) {