v4.19.13 snapshot.
diff --git a/net/appletalk/sysctl_net_atalk.c b/net/appletalk/sysctl_net_atalk.c
new file mode 100644
index 0000000..c744a85
--- /dev/null
+++ b/net/appletalk/sysctl_net_atalk.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sysctl_net_atalk.c: sysctl interface to net AppleTalk subsystem.
+ *
+ * Begun April 1, 1996, Mike Shaver.
+ * Added /proc/sys/net/atalk directory entry (empty =) ). [MS]
+ * Dynamic registration, added aarp entries. (5/30/97 Chris Horn)
+ */
+
+#include <linux/sysctl.h>
+#include <net/sock.h>
+#include <linux/atalk.h>
+
+static struct ctl_table atalk_table[] = {
+ {
+ .procname = "aarp-expiry-time",
+ .data = &sysctl_aarp_expiry_time,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {
+ .procname = "aarp-tick-time",
+ .data = &sysctl_aarp_tick_time,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {
+ .procname = "aarp-retransmit-limit",
+ .data = &sysctl_aarp_retransmit_limit,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "aarp-resolve-time",
+ .data = &sysctl_aarp_resolve_time,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ { },
+};
+
+static struct ctl_table_header *atalk_table_header;
+
+void atalk_register_sysctl(void)
+{
+ atalk_table_header = register_net_sysctl(&init_net, "net/appletalk", atalk_table);
+}
+
+void atalk_unregister_sysctl(void)
+{
+ unregister_net_sysctl_table(atalk_table_header);
+}