can: af_can: export can_sock_destruct()

In j1939 we need our own struct sock::sk_destruct callback. Export the
generic af_can can_sock_destruct() that allows us to chain-call it.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>

diff --git a/include/linux/can/core.h b/include/linux/can/core.h
index 8339071..e20a0cd 100644 (file)
--- a/include/linux/can/core.h
+++ b/include/linux/can/core.h
@@ -65,5 +65,6 @@ extern void can_rx_unregister(struct net *net, struct net_device *dev,
                              void *data);
 
 extern int can_send(struct sk_buff *skb, int loop);
+void can_sock_destruct(struct sock *sk);
 
 #endif /* !_CAN_CORE_H */

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 5518a7d..128d37a 100644 (file)
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -86,11 +86,12 @@ static atomic_t skbcounter = ATOMIC_INIT(0);
 
 /* af_can socket functions */
 
-static void can_sock_destruct(struct sock *sk)
+void can_sock_destruct(struct sock *sk)
 {
        skb_queue_purge(&sk->sk_receive_queue);
        skb_queue_purge(&sk->sk_error_queue);
 }
+EXPORT_SYMBOL(can_sock_destruct);
 
 static const struct can_proto *can_get_proto(int protocol)
 {