From: David S. Miller <davem@davemloft.net>
Date: Tue, 23 Sep 2008 07:34:07 +0000 (-0700)
Subject: net: Add skb_queue_is_last().
X-Git-Tag: v2.6.28-rc1~717^2~208
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=fc7ebb212d3e51d1188948d975aa93dbb0f58b25;p=linux-2.6-omap-h63xx.git

net: Add skb_queue_is_last().

Several bits of code want to know "is this the last SKB in
a queue", and all of them implement this by hand.

Provide an common interface to make this check.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4a144e8d053..3a5838da160 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -472,6 +472,19 @@ static inline int skb_queue_empty(const struct sk_buff_head *list)
 	return list->next == (struct sk_buff *)list;
 }
 
+/**
+ *	skb_queue_is_last - check if skb is the last entry in the queue
+ *	@list: queue head
+ *	@skb: buffer
+ *
+ *	Returns true if @skb is the last buffer on the list.
+ */
+static inline bool skb_queue_is_last(const struct sk_buff_head *list,
+				     const struct sk_buff *skb)
+{
+	return (skb->next == (struct sk_buff *) list);
+}
+
 /**
  *	skb_get - reference buffer
  *	@skb: buffer to reference