[IPV6]: Make the ipv6/sysctl_net_ipv6.c compilation cleaner

Since this file is entirely enclosed with the
#ifdef CONFIG_SYSCTL/#endif pair, it's OK to move this
CONFIG_ into a Makefile.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/Makefile

@@ -8,9 +8,9 @@ ipv6-objs :=	af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
 		addrlabel.o \
 		route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o udplite.o \
 		raw.o protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
-		exthdrs.o sysctl_net_ipv6.o datagram.o \
-		ip6_flowlabel.o inet6_connection_sock.o
+		exthdrs.o datagram.o ip6_flowlabel.o inet6_connection_sock.o
 
+ipv6-$(CONFIG_SYSCTL) = sysctl_net_ipv6.o
 ipv6-$(CONFIG_XFRM) += xfrm6_policy.o xfrm6_state.o xfrm6_input.o \
 	xfrm6_output.o
 ipv6-$(CONFIG_NETFILTER) += netfilter.o

net/ipv6/sysctl_net_ipv6.c

@@ -14,8 +14,6 @@
 #include <net/addrconf.h>
 #include <net/inet_frag.h>
 
-#ifdef CONFIG_SYSCTL
-
 static ctl_table ipv6_table[] = {
 	{
 		.ctl_name	= NET_IPV6_ROUTE,
@@ -115,8 +113,3 @@ void ipv6_sysctl_unregister(void)
 {
 	unregister_sysctl_table(ipv6_sysctl_header);
 }
-
-#endif /* CONFIG_SYSCTL */
-
-
-