From: Florian Westphal fw@strlen.de
commit 51fa7f8ebf0e25c7a9039fa3988a623d5f3855aa upstream.
These structures are initialised from the init hooks, so we can't make them 'const'. But no writes occur afterwards, so we can use ro_after_init.
Also, remove bogus EXPORT_SYMBOL, the only access comes from ip stack, not from kernel modules.
Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Mat Martineau mathew.j.martineau@linux.intel.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/mptcp/subflow.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
--- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -484,8 +484,7 @@ do_reset: }
struct request_sock_ops mptcp_subflow_request_sock_ops; -EXPORT_SYMBOL_GPL(mptcp_subflow_request_sock_ops); -static struct tcp_request_sock_ops subflow_request_sock_ipv4_ops; +static struct tcp_request_sock_ops subflow_request_sock_ipv4_ops __ro_after_init;
static int subflow_v4_conn_request(struct sock *sk, struct sk_buff *skb) { @@ -506,9 +505,9 @@ drop: }
#if IS_ENABLED(CONFIG_MPTCP_IPV6) -static struct tcp_request_sock_ops subflow_request_sock_ipv6_ops; -static struct inet_connection_sock_af_ops subflow_v6_specific; -static struct inet_connection_sock_af_ops subflow_v6m_specific; +static struct tcp_request_sock_ops subflow_request_sock_ipv6_ops __ro_after_init; +static struct inet_connection_sock_af_ops subflow_v6_specific __ro_after_init; +static struct inet_connection_sock_af_ops subflow_v6m_specific __ro_after_init; static struct proto tcpv6_prot_override;
static int subflow_v6_conn_request(struct sock *sk, struct sk_buff *skb) @@ -790,7 +789,7 @@ dispose_child: return child; }
-static struct inet_connection_sock_af_ops subflow_specific; +static struct inet_connection_sock_af_ops subflow_specific __ro_after_init; static struct proto tcp_prot_override;
enum mapping_status { @@ -1327,7 +1326,7 @@ static void subflow_write_space(struct s mptcp_write_space(sk); }
-static struct inet_connection_sock_af_ops * +static const struct inet_connection_sock_af_ops * subflow_default_af_ops(struct sock *sk) { #if IS_ENABLED(CONFIG_MPTCP_IPV6) @@ -1342,7 +1341,7 @@ void mptcpv6_handle_mapped(struct sock * { struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); struct inet_connection_sock *icsk = inet_csk(sk); - struct inet_connection_sock_af_ops *target; + const struct inet_connection_sock_af_ops *target;
target = mapped ? &subflow_v6m_specific : subflow_default_af_ops(sk);