net: Use RCU_INIT_POINTER() to set sk_wq

This pointer is RCU protected, so proper primitives should be used.
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/sock.c

@@ -1865,7 +1865,7 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
 		 */
 		sk_refcnt_debug_inc(newsk);
 		sk_set_socket(newsk, NULL);
-		newsk->sk_wq = NULL;
+		RCU_INIT_POINTER(newsk->sk_wq, NULL);
 
 		if (newsk->sk_prot->sockets_allocated)
 			sk_sockets_allocated_inc(newsk);
@@ -2828,11 +2828,11 @@ void sock_init_data(struct socket *sock, struct sock *sk)
 
 	if (sock) {
 		sk->sk_type	=	sock->type;
-		sk->sk_wq	=	sock->wq;
+		RCU_INIT_POINTER(sk->sk_wq, sock->wq);
 		sock->sk	=	sk;
 		sk->sk_uid	=	SOCK_INODE(sock)->i_uid;
 	} else {
-		sk->sk_wq	=	NULL;
+		RCU_INIT_POINTER(sk->sk_wq, NULL);
 		sk->sk_uid	=	make_kuid(sock_net(sk)->user_ns, 0);
 	}