diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 4e967b2e22cc5b7c4126802aebad6b9712492117..caa3c2593719215ca4dc5a431b7adaeb0be62b98 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -66,6 +66,10 @@ struct netpoll_info;
 #define NET_RX_CN_HIGH		4   /* The storm is here */
 #define NET_RX_BAD		5  /* packet dropped due to kernel error */
 
+/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
+ * indicates that the device will soon be dropping packets, or already drops
+ * some packets of the same priority; prompting us to send less aggressively. */
+#define net_xmit_eval(e)	((e) == NET_XMIT_CN? 0 : (e))
 #define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)
 
 #endif
diff --git a/include/net/ipip.h b/include/net/ipip.h
index f490c3cbe377310a5d8bde2d0e2c057aa0fa778a..84058858eea7bbe20b36bfe1667541d09e592da8 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -35,7 +35,7 @@ struct ip_tunnel
 	ip_send_check(iph);						\
 									\
 	err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev, dst_output);\
-	if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) {		\
+	if (net_xmit_eval(err) == 0) {					\
 		stats->tx_bytes += pkt_len;				\
 		stats->tx_packets++;					\
 	} else {							\
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index bc400b2ba25e2dd589e0e8698b330c98a75bdc43..61c09014dade2d5c531582e0aff5555b9e697ce8 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -501,8 +501,7 @@ static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
 		err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
 					    ireq->rmt_addr,
 					    ireq->opt);
-		if (err == NET_XMIT_CN)
-			err = 0;
+		err = net_xmit_eval(err);
 	}
 
 out:
@@ -571,7 +570,7 @@ static void dccp_v4_ctl_send_reset(struct sk_buff *rxskb)
 				    rxskb->nh.iph->saddr, NULL);
 	bh_unlock_sock(dccp_v4_ctl_socket->sk);
 
-	if (err == NET_XMIT_CN || err == 0) {
+	if (net_xmit_eval(err) == 0) {
 		DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
 		DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
 	}
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 8d6ddb6389a7b2e00f3bab0458d1bdbbdcd9fb51..2165b1740c7c113c240fc7926c659c580a63edbf 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -294,8 +294,7 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
 							 &ireq6->rmt_addr);
 		ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
 		err = ip6_xmit(sk, skb, &fl, opt, 0);
-		if (err == NET_XMIT_CN)
-			err = 0;
+		err = net_xmit_eval(err);
 	}
 
 done:
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 0994b13f0f15cd7b97e3f027771d6cf90897d63e..ef22f3cc791a2cd45b1ef7b01f95684d4f53ae45 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -125,16 +125,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 
 		memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
 		err = icsk->icsk_af_ops->queue_xmit(skb, sk, 0);
-		if (err <= 0)
-			return err;
-
-		/* NET_XMIT_CN is special. It does not guarantee,
-		 * that this packet is lost. It tells that device
-		 * is about to start to drop packets or already
-		 * drops some packets of the same priority and
-		 * invokes us to send less aggressively.
-		 */
-		return err == NET_XMIT_CN ? 0 : err;
+		return net_xmit_eval(err);
 	}
 	return -ENOBUFS;
 }
@@ -426,8 +417,7 @@ int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code)
 		if (skb != NULL) {
 			memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
 			err = inet_csk(sk)->icsk_af_ops->queue_xmit(skb, sk, 0);
-			if (err == NET_XMIT_CN)
-				err = 0;
+			return net_xmit_eval(err);
 		}
 	}
 
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 2eb58844403c81689807881c518c32a9cd333714..0ad0904bf56c6bd4fccdbfd73e81b0c0650c7a89 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -662,8 +662,7 @@ static int tcp_v4_send_synack(struct sock *sk, struct request_sock *req,
 		err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
 					    ireq->rmt_addr,
 					    ireq->opt);
-		if (err == NET_XMIT_CN)
-			err = 0;
+		err = net_xmit_eval(err);
 	}
 
 out:
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f63e99aac2d5bdc5152af8a5128861e319737b3d..6a8581ab9a23787d784240ca1da65c4d4cbe0b04 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -484,13 +484,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it,
 
 	tcp_enter_cwr(sk);
 
-	/* NET_XMIT_CN is special. It does not guarantee,
-	 * that this packet is lost. It tells that device
-	 * is about to start to drop packets or already
-	 * drops some packets of the same priority and
-	 * invokes us to send less aggressively.
-	 */
-	return err == NET_XMIT_CN ? 0 : err;
+	return net_xmit_eval(err);
 
 #undef SYSCTL_FLAG_TSTAMPS
 #undef SYSCTL_FLAG_WSCALE
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 4919f9294e2a3bf4c105fdb2d089d19279eac136..80a11909159d9d1e5127697423735680d00eec52 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -748,7 +748,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
 	err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, 
 		      skb->dst->dev, dst_output);
 
-	if (err == NET_XMIT_SUCCESS || err == NET_XMIT_CN) {
+	if (net_xmit_eval(err) == 0) {
 		stats->tx_bytes += pkt_len;
 		stats->tx_packets++;
 	} else {
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 9a8e690fdf7caee38f1489f846b1a421a1acc3f9..9a88395a7629e69c1c2b3e2cd46ad985b0cf68a0 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -502,8 +502,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
 
 		ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr);
 		err = ip6_xmit(sk, skb, &fl, opt, 0);
-		if (err == NET_XMIT_CN)
-			err = 0;
+		err = net_xmit_eval(err);
 	}
 
 done: