tcp: mark trace event arguments sk and skb as const

Some functions that we plan to add trace points require const sk
and/or skb. So we mark these fields as const in the tracepoint.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index 14b0a70..2b6fe72 100644 (file)
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h
@@ -17,13 +17,13 @@
  */
 DECLARE_EVENT_CLASS(tcp_event_sk_skb,
 
-       TP_PROTO(struct sock *sk, struct sk_buff *skb),
+       TP_PROTO(const struct sock *sk, const struct sk_buff *skb),
 
        TP_ARGS(sk, skb),
 
        TP_STRUCT__entry(
-               __field(void *, skbaddr)
-               __field(void *, skaddr)
+               __field(const void *, skbaddr)
+               __field(const void *, skaddr)
                __field(__u16, sport)
                __field(__u16, dport)
                __array(__u8, saddr, 4)
@@ -72,7 +72,7 @@ DECLARE_EVENT_CLASS(tcp_event_sk_skb,
 
 DEFINE_EVENT(tcp_event_sk_skb, tcp_retransmit_skb,
 
-       TP_PROTO(struct sock *sk, struct sk_buff *skb),
+       TP_PROTO(const struct sock *sk, const struct sk_buff *skb),
 
        TP_ARGS(sk, skb)
 );