diff --git a/[refs] b/[refs]
index 873b99cfca7e..56c352ac3a68 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bc2ce894e113ed95b92541134b002fdc641e8080
+refs/heads/master: 04fb451eff978ca059399eab83d5594b073caf6f
diff --git a/trunk/include/linux/skbuff.h b/trunk/include/linux/skbuff.h
index 4c4bec6316d9..20ec0a64cb9f 100644
--- a/trunk/include/linux/skbuff.h
+++ b/trunk/include/linux/skbuff.h
@@ -1355,6 +1355,11 @@ static inline void skb_set_mac_header(struct sk_buff *skb, const int offset)
 }
 #endif /* NET_SKBUFF_DATA_USES_OFFSET */
 
+static inline int skb_checksum_start_offset(const struct sk_buff *skb)
+{
+	return skb->csum_start - skb_headroom(skb);
+}
+
 static inline int skb_transport_offset(const struct sk_buff *skb)
 {
 	return skb_transport_header(skb) - skb->data;