diff options
| -rw-r--r-- | include/net/sock.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 0e962d8bc73b..2fc513aa114c 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2266,8 +2266,13 @@ struct sk_buff *sock_dequeue_err_skb(struct sock *sk); static inline int sock_error(struct sock *sk) { int err; - if (likely(!sk->sk_err)) + + /* Avoid an atomic operation for the common case. + * This is racy since another cpu/thread can change sk_err under us. + */ + if (likely(data_race(!sk->sk_err))) return 0; + err = xchg(&sk->sk_err, 0); return -err; } |