[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/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 3ffa60d..44fdf14 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1394,6 +1394,14 @@
 			.proc_handler	= &proc_dointvec,
 		},
 		{
+			.ctl_name	= NET_IPV4_CONF_ARP_ACCEPT,
+			.procname	= "arp_accept",
+			.data		= &ipv4_devconf.arp_accept,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
 			.ctl_name	= NET_IPV4_CONF_NOXFRM,
 			.procname	= "disable_xfrm",
 			.data		= &ipv4_devconf.no_xfrm,