tcp: annotate tp->write_seq lockless reads

[linux-2.6-block.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 35f6f7e0fdc29d303614c101d172d87d9a4ed28d..8e7c3f6801a935c2ef4c76e7e3790ce39adcf5cb 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1917,7 +1917,7 @@ static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
 static inline bool tcp_stream_memory_free(const struct sock *sk, int wake)
 {
        const struct tcp_sock *tp = tcp_sk(sk);
-       u32 notsent_bytes = tp->write_seq - tp->snd_nxt;
+       u32 notsent_bytes = READ_ONCE(tp->write_seq) - tp->snd_nxt;
 
        return (notsent_bytes << wake) < tcp_notsent_lowat(tp);
 }