core: remove some pointless conditionals before kfree_skb()

Remove some pointless conditionals before kfree_skb().
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/neighbour.c

@@ -871,7 +871,6 @@ static void neigh_timer_handler(unsigned long arg)
 		write_unlock(&neigh->lock);
 		neigh->ops->solicit(neigh, skb);
 		atomic_inc(&neigh->probes);
-		if (skb)
 		kfree_skb(skb);
 	} else {
 out:
@@ -908,7 +907,6 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
 			neigh->updated = jiffies;
 			write_unlock_bh(&neigh->lock);
 
-			if (skb)
 			kfree_skb(skb);
 			return 1;
 		}

net/core/skbuff.c

@@ -1208,7 +1208,6 @@ unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta)
 					insp = list;
 				}
 				if (!pskb_pull(list, eat)) {
-					if (clone)
 					kfree_skb(clone);
 					return NULL;
 				}