[IPV4]: Use time_after() in override ARP calculation.

net/ipv4/arp.c

@@ -891,15 +891,14 @@ int arp_process(struct sk_buff *skb)
 
 	if (n) {
 		int state = NUD_REACHABLE;
-		int override = 0;
+		int override;
 
 		/* If several different ARP replies follows back-to-back,
 		   use the FIRST one. It is possible, if several proxy
 		   agents are active. Taking the first reply prevents
 		   arp trashing and chooses the fastest router.
 		 */
-		if (jiffies - n->updated >= n->parms->locktime)
-			override = 1;
+		override = time_after(jiffies, n->updated + n->parms->locktime);
 
 		/* Broadcast replies and request packets
 		   do not assert neighbour reachability.