net: use common macro for assering skb->cb[] available size in protocol families

[firefly-linux-kernel-4.4.55.git] / include / net / sock.h

diff --git a/include/net/sock.h b/include/net/sock.h
index ab186b1d31fffe7cc5b4888d85aca99c2d875da4..a2502d248641f24746c2581a40bde4fe7476facb 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2078,6 +2078,9 @@ static inline int sock_intr_errno(long timeo)
        return timeo == MAX_SCHEDULE_TIMEOUT ? -ERESTARTSYS : -EINTR;
 }
 
+#define sock_skb_cb_check_size(size) \
+       BUILD_BUG_ON((size) > FIELD_SIZEOF(struct sk_buff, cb))
+
 void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
                           struct sk_buff *skb);
 void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,