2 files changed, 10 insertions, 7 deletions

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 0b3d9f1d8069..c844954c1ad5 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -419,15 +419,18 @@ config IP_TCPDIAG
         ---help---
           Support for TCP socket monitoring interface used by native Linux
           tools such as ss. ss is included in iproute2, currently downloadable
-          at <http://developer.osdl.org/dev/iproute2>. If you want IPv6 support
-          and have selected IPv6 as a module, you need to build this as a
-          module too.
+          at <http://developer.osdl.org/dev/iproute2>. If you want IPv6 or DCCP
+          support and have selected IPv6 or DCCP as a module, you need to build
+          this as a module too.
           
           If unsure, say Y.
 
 config IP_TCPDIAG_IPV6
         def_bool (IP_TCPDIAG=y && IPV6=y) || (IP_TCPDIAG=m && IPV6)
 
+config IP_TCPDIAG_DCCP
+        def_bool (IP_TCPDIAG=y && IP_DCCP=y) || (IP_TCPDIAG=m && IP_DCCP)
+
 config TCP_CONG_ADVANCED
         bool "TCP: advanced congestion control"
         ---help---
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index f5fc84aaa9b4..8bf495c698f8 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -45,7 +45,7 @@ static struct sock *tcpnl;
 #define TCPDIAG_PUT(skb, attrtype, attrlen) \
         RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
 
-#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
+#ifdef CONFIG_IP_TCPDIAG_DCCP
 extern struct inet_hashinfo dccp_hashinfo;
 #endif
 
@@ -216,7 +216,7 @@ static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
         struct tcpdiagreq *req = NLMSG_DATA(nlh);
         struct sk_buff *rep;
         struct inet_hashinfo *hashinfo = &tcp_hashinfo;
-#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
+#ifdef CONFIG_IP_TCPDIAG_DCCP
         if (nlh->nlmsg_type == DCCPDIAG_GETSOCK)
                 hashinfo = &dccp_hashinfo;
 #endif
@@ -614,7 +614,7 @@ static int tcpdiag_dump(struct sk_buff *skb, struct netlink_callback *cb)
         s_i = cb->args[1];
         s_num = num = cb->args[2];
                 hashinfo = &tcp_hashinfo;
-#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
+#ifdef CONFIG_IP_TCPDIAG_DCCP
         if (cb->nlh->nlmsg_type == DCCPDIAG_GETSOCK)
                 hashinfo = &dccp_hashinfo;
 #endif
@@ -752,7 +752,7 @@ tcpdiag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                 return 0;
 
         if (nlh->nlmsg_type != TCPDIAG_GETSOCK
-#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
+#ifdef CONFIG_IP_TCPDIAG_DCCP
             && nlh->nlmsg_type != DCCPDIAG_GETSOCK
 #endif
            )