diff --git a/[refs] b/[refs]
index 0aa89b87b6e8..e5e184e7a33c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8fb4e1399137dbbf7f1071bc723b5eff8ad46d1a
+refs/heads/master: 22019b17821ab3543090827491e465c5816cbcd6
diff --git a/trunk/net/core/skbuff.c b/trunk/net/core/skbuff.c
index 2beda824636e..27002dffe7ed 100644
--- a/trunk/net/core/skbuff.c
+++ b/trunk/net/core/skbuff.c
@@ -1369,8 +1369,21 @@ unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta)
 }
 EXPORT_SYMBOL(__pskb_pull_tail);
 
-/* Copy some data bits from skb to kernel buffer. */
-
+/**
+ *	skb_copy_bits - copy bits from skb to kernel buffer
+ *	@skb: source skb
+ *	@offset: offset in source
+ *	@to: destination buffer
+ *	@len: number of bytes to copy
+ *
+ *	Copy the specified number of bytes from the source skb to the
+ *	destination buffer.
+ *
+ *	CAUTION ! :
+ *		If its prototype is ever changed,
+ *		check arch/{*}/net/{*}.S files,
+ *		since it is called from BPF assembly code.
+ */
 int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
 {
 	int start = skb_headlen(skb);