[IPV4] ARP: Alloc acceptance of unsolicited ARP via netdevice sysctl.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index fd7af86..92297ff 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -25,6 +25,7 @@
 	int     arp_filter;
 	int	arp_announce;
 	int	arp_ignore;
+	int	arp_accept;
 	int	medium_id;
 	int	no_xfrm;
 	int	no_policy;
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index dfcf449..8754568 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -456,6 +456,7 @@
 	NET_IPV4_CONF_ARP_ANNOUNCE=18,
 	NET_IPV4_CONF_ARP_IGNORE=19,
 	NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
+	NET_IPV4_CONF_ARP_ACCEPT=21,
 	__NET_IPV4_CONF_MAX
 };