[TCP] mtu probing: move tcp-specific data out of inet_connection_sock

This moves some TCP-specific MTU probing state out of
inet_connection_sock back to tcp_sock.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index f2bb239..542d395 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -343,6 +343,12 @@
 		__u32	seq;
 		__u32	time;
 	} rcvq_space;
+
+/* TCP-specific MTU probe information. */
+	struct {
+		__u32		  probe_seq_start;
+		__u32		  probe_seq_end;
+	} mtu_probe;
 };
 
 static inline struct tcp_sock *tcp_sk(const struct sock *sk)
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index b3abe33..4e5a9ff 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -114,8 +114,6 @@
 
 		/* Information on the current probe. */
 		int		  probe_size;
-		__u32		  probe_seq_start;
-		__u32		  probe_seq_end;
 	} icsk_mtup;
 	u32			  icsk_ca_priv[16];
 #define ICSK_CA_PRIV_SIZE	(16 * sizeof(u32))