netdev - [PATCH]: net: Add skb_queue_is

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Message-Id: <20080923.003601.243492100.davem@davemloft.net>
Date:	Tue, 23 Sep 2008 00:36:01 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	netdev@...r.kernel.org
Subject: [PATCH]: net: Add skb_queue_is_last().


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@...emloft.net>
---
 include/linux/skbuff.h |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4a144e8..3a5838d 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -473,6 +473,19 @@ static inline int skb_queue_empty(const struct sk_buff_head *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
  *
-- 
1.5.6.5

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