[PATCH] sysctl: make sure that /proc/sys/net/ipv4 appears before per-ns ones

Massage ipv4 initialization - make sure that net.ipv4 appears as
non-per-net-namespace before it shows up in per-net-namespace sysctls.
That's the only change outside of sysctl.c needed to get sane ordering
rules and data structures for sysctls (esp. for procfs side of that
mess).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

net/ipv4/sysctl_net_ipv4.c

@@ -882,4 +882,11 @@ static __init int sysctl_ipv4_init(void)
 	return 0;
 }
 
+/* set enough of tree skeleton to get rid of ordering problems */
+void __init ip_static_sysctl_init(void)
+{
+	static ctl_table table[1];
+	register_sysctl_paths(net_ipv4_ctl_path, table);
+}
+
 __initcall(sysctl_ipv4_init);