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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2008-04-14 00:04:12 -0700
committerDavid S. Miller <davem@davemloft.net>2008-04-14 00:04:12 -0700
commitf525c06d12b72cddb085df7f6f348c3c5a39b3ce (patch)
treeb2b919ff924d0feb3c8cb1b565a001949ec92270
parent0912ea38de61378c5c753aef78c12e2f95854313 (diff)
[SKB]: __skb_dequeue = skb_peek + __skb_unlink
By rearranging the order of declarations, __skb_dequeue() is expressed in terms of * skb_peek() and * __skb_unlink(), thus in effect mirroring the analogue implementation of __skb_dequeue_tail(). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/skbuff.h47
1 files changed, 16 insertions, 31 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index e517701c25ba..c2116200580a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -734,35 +734,6 @@ static inline void __skb_queue_tail(struct sk_buff_head *list,
next->prev = prev->next = newsk;
}
-
-/**
- * __skb_dequeue - remove from the head of the queue
- * @list: list to dequeue from
- *
- * Remove the head of the list. This function does not take any locks
- * so must be used with appropriate locks held only. The head item is
- * returned or %NULL if the list is empty.
- */
-extern struct sk_buff *skb_dequeue(struct sk_buff_head *list);
-static inline struct sk_buff *__skb_dequeue(struct sk_buff_head *list)
-{
- struct sk_buff *next, *prev, *result;
-
- prev = (struct sk_buff *) list;
- next = prev->next;
- result = NULL;
- if (next != prev) {
- result = next;
- next = next->next;
- list->qlen--;
- next->prev = prev;
- prev->next = next;
- result->next = result->prev = NULL;
- }
- return result;
-}
-
-
/*
* Insert a packet on a list.
*/
@@ -803,8 +774,22 @@ static inline void __skb_unlink(struct sk_buff *skb, struct sk_buff_head *list)
prev->next = next;
}
-
-/* XXX: more streamlined implementation */
+/**
+ * __skb_dequeue - remove from the head of the queue
+ * @list: list to dequeue from
+ *
+ * Remove the head of the list. This function does not take any locks
+ * so must be used with appropriate locks held only. The head item is
+ * returned or %NULL if the list is empty.
+ */
+extern struct sk_buff *skb_dequeue(struct sk_buff_head *list);
+static inline struct sk_buff *__skb_dequeue(struct sk_buff_head *list)
+{
+ struct sk_buff *skb = skb_peek(list);
+ if (skb)
+ __skb_unlink(skb, list);
+ return skb;
+}
/**
* __skb_dequeue_tail - remove from the tail of the queue