commit f964629e3338d9e5a78c9b354380d5a1e2fa4617
author Eric Dumazet <edumazet@google.com> Tue Sep 29 07:42:50 2015 -0700
committer David S. Miller <davem@davemloft.net> Tue Sep 29 16:53:09 2015 -0700
tree b81d02c2c7658e48482bfd0158bd7c0aa24d2111
parent 3f684b4b1f1c86e3a6ac63389d1032e239fddd79

tcp: constify tcp_v{4|6}_route_req() sock argument

These functions do not change the listener socket.
Goal is to make sure tcp_conn_request() is not messing with
listener in a racy way.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 5aa6672..2c7dfe5 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1711,7 +1711,7 @@
 	__u32 (*cookie_init_seq)(const struct sk_buff *skb,
 				 __u16 *mss);
 #endif
-	struct dst_entry *(*route_req)(struct sock *sk, struct flowi *fl,
+	struct dst_entry *(*route_req)(const struct sock *sk, struct flowi *fl,
 				       const struct request_sock *req,
 				       bool *strict);
 	__u32 (*init_seq)(const struct sk_buff *skb);