File-copy from v4.4.100

This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Please refer to that tree for all history prior to this point.

Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/net/ipx/sysctl_net_ipx.c b/net/ipx/sysctl_net_ipx.c
new file mode 100644
index 0000000..0dafcc5
--- /dev/null
+++ b/net/ipx/sysctl_net_ipx.c
@@ -0,0 +1,39 @@
+/* -*- linux-c -*-
+ * sysctl_net_ipx.c: sysctl interface to net IPX subsystem.
+ *
+ * Begun April 1, 1996, Mike Shaver.
+ * Added /proc/sys/net/ipx directory entry (empty =) ). [MS]
+ * Added /proc/sys/net/ipx/ipx_pprop_broadcasting - acme March 4, 2001
+ */
+
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <net/net_namespace.h>
+#include <net/ipx.h>
+
+#ifndef CONFIG_SYSCTL
+#error This file should not be compiled without CONFIG_SYSCTL defined
+#endif
+
+static struct ctl_table ipx_table[] = {
+	{
+		.procname	= "ipx_pprop_broadcasting",
+		.data		= &sysctl_ipx_pprop_broadcasting,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+	{ },
+};
+
+static struct ctl_table_header *ipx_table_header;
+
+void ipx_register_sysctl(void)
+{
+	ipx_table_header = register_net_sysctl(&init_net, "net/ipx", ipx_table);
+}
+
+void ipx_unregister_sysctl(void)
+{
+	unregister_net_sysctl_table(ipx_table_header);
+}