net: fix build errors if ipv6 is disabled

CONFIG_IPV6=n is still a valid choice ;)

It appears we can remove dead code.

Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 27535fd5ea10..8fcc2cb9dba4 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -251,10 +251,12 @@ static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock
                 addr.addr.a4 = tw->tw_daddr;
                 hash = (__force unsigned int) addr.addr.a4;
                 break;
+#if IS_ENABLED(CONFIG_IPV6)
         case AF_INET6:
                 *(struct in6_addr *)addr.addr.a6 = tw->tw_v6_daddr;
                 hash = ipv6_addr_hash(&tw->tw_v6_daddr);
                 break;
+#endif
         default:
                 return NULL;
         }
@@ -286,10 +288,12 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
                 addr.addr.a4 = inet_sk(sk)->inet_daddr;
                 hash = (__force unsigned int) addr.addr.a4;
                 break;
+#if IS_ENABLED(CONFIG_IPV6)
         case AF_INET6:
                 *(struct in6_addr *)addr.addr.a6 = sk->sk_v6_daddr;
                 hash = ipv6_addr_hash(&sk->sk_v6_daddr);
                 break;
+#endif
         default:
                 return NULL;
         }