tcp: Use SKB queue handling interfaces instead of by-hand versions.

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

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 5c5327e..12c9b4f 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1181,49 +1181,45 @@ static inline void tcp_write_queue_purge(struct sock *sk)
 
 static inline struct sk_buff *tcp_write_queue_head(struct sock *sk)
 {
-       struct sk_buff *skb = sk->sk_write_queue.next;
-       if (skb == (struct sk_buff *) &sk->sk_write_queue)
-               return NULL;
-       return skb;
+       return skb_peek(&sk->sk_write_queue);
 }
 
 static inline struct sk_buff *tcp_write_queue_tail(struct sock *sk)
 {
-       struct sk_buff *skb = sk->sk_write_queue.prev;
-       if (skb == (struct sk_buff *) &sk->sk_write_queue)
-               return NULL;
-       return skb;
+       return skb_peek_tail(&sk->sk_write_queue);
 }
 
 static inline struct sk_buff *tcp_write_queue_next(struct sock *sk, struct sk_buff *skb)
 {
-       return skb->next;
+       return skb_queue_next(&sk->sk_write_queue, skb);
 }
 
 #define tcp_for_write_queue(skb, sk)                                   \
-               for (skb = (sk)->sk_write_queue.next;                   \
-                    (skb != (struct sk_buff *)&(sk)->sk_write_queue);  \
-                    skb = skb->next)
+       skb_queue_walk(&(sk)->sk_write_queue, skb)
 
 #define tcp_for_write_queue_from(skb, sk)                              \
-               for (; (skb != (struct sk_buff *)&(sk)->sk_write_queue);\
-                    skb = skb->next)
+       skb_queue_walk_from(&(sk)->sk_write_queue, skb)
 
 #define tcp_for_write_queue_from_safe(skb, tmp, sk)                    \
-               for (tmp = skb->next;                                   \
-                    (skb != (struct sk_buff *)&(sk)->sk_write_queue);  \
-                    skb = tmp, tmp = skb->next)
+       skb_queue_walk_from_safe(&(sk)->sk_write_queue, skb, tmp)
 
 static inline struct sk_buff *tcp_send_head(struct sock *sk)
 {
        return sk->sk_send_head;
 }
 
+static inline bool tcp_skb_is_last(const struct sock *sk,
+                                  const struct sk_buff *skb)
+{
+       return skb_queue_is_last(&sk->sk_write_queue, skb);
+}
+
 static inline void tcp_advance_send_head(struct sock *sk, struct sk_buff *skb)
 {
-       sk->sk_send_head = skb->next;
-       if (sk->sk_send_head == (struct sk_buff *)&sk->sk_write_queue)
+       if (tcp_skb_is_last(sk, skb))
                sk->sk_send_head = NULL;
+       else
+               sk->sk_send_head = tcp_write_queue_next(sk, skb);
 }
 
 static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unlinked)
@@ -1284,12 +1280,6 @@ static inline void tcp_unlink_write_queue(struct sk_buff *skb, struct sock *sk)
        __skb_unlink(skb, &sk->sk_write_queue);
 }
 
-static inline bool tcp_skb_is_last(const struct sock *sk,
-                                  const struct sk_buff *skb)
-{
-       return skb_queue_is_last(&sk->sk_write_queue, skb);
-}
-
 static inline int tcp_write_queue_empty(struct sock *sk)
 {
        return skb_queue_empty(&sk->sk_write_queue);