bridge: fix IPV6=n build

Fix bridge netfilter code so that it uses CONFIG_IPV6 as needed:

net/built-in.o: In function `ebt_filter_ip6':
ebt_ip6.c:(.text+0x87c37): undefined reference to `ipv6_skip_exthdr'
net/built-in.o: In function `ebt_log_packet':
ebt_log.c:(.text+0x88dee): undefined reference to `ipv6_skip_exthdr'
make[1]: *** [.tmp_vmlinux1] Error 1

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 4 insertions, 2 deletions

diff --git a/net/bridge/netfilter/Kconfig b/net/bridge/netfilter/Kconfig
index fb684c2ff8b6..540df4106bec 100644
--- a/net/bridge/netfilter/Kconfig
+++ b/net/bridge/netfilter/Kconfig
@@ -85,7 +85,7 @@ config BRIDGE_EBT_IP
 
 config BRIDGE_EBT_IP6
         tristate "ebt: IP6 filter support"
-        depends on BRIDGE_NF_EBTABLES
+        depends on BRIDGE_NF_EBTABLES && IPV6
         help
           This option adds the IP6 match, which allows basic IPV6 header field
           filtering.
diff --git a/net/bridge/netfilter/Makefile b/net/bridge/netfilter/Makefile
index dd960645b413..0718699540b0 100644
--- a/net/bridge/netfilter/Makefile
+++ b/net/bridge/netfilter/Makefile
@@ -14,7 +14,7 @@ obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o
 obj-$(CONFIG_BRIDGE_EBT_AMONG) += ebt_among.o
 obj-$(CONFIG_BRIDGE_EBT_ARP) += ebt_arp.o
 obj-$(CONFIG_BRIDGE_EBT_IP) += ebt_ip.o
-obj-$(CONFIG_BRIDGE_EBT_IP) += ebt_ip6.o
+obj-$(CONFIG_BRIDGE_EBT_IP6) += ebt_ip6.o
 obj-$(CONFIG_BRIDGE_EBT_LIMIT) += ebt_limit.o
 obj-$(CONFIG_BRIDGE_EBT_MARK) += ebt_mark_m.o
 obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o
diff --git a/net/bridge/netfilter/ebt_log.c b/net/bridge/netfilter/ebt_log.c
index c883ec8a28b4..2f430d4ae911 100644
--- a/net/bridge/netfilter/ebt_log.c
+++ b/net/bridge/netfilter/ebt_log.c
@@ -123,6 +123,7 @@ ebt_log_packet(unsigned int pf, unsigned int hooknum,
                 goto out;
         }
 
+#if defined(CONFIG_BRIDGE_EBT_IP6) || defined(CONFIG_BRIDGE_EBT_IP6_MODULE)
         if ((bitmask & EBT_LOG_IP6) && eth_hdr(skb)->h_proto ==
            htons(ETH_P_IPV6)) {
                 const struct ipv6hdr *ih;
@@ -146,6 +147,7 @@ ebt_log_packet(unsigned int pf, unsigned int hooknum,
                 print_ports(skb, nexthdr, offset_ph);
                 goto out;
         }
+#endif
 
         if ((bitmask & EBT_LOG_ARP) &&
             ((eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) ||