v4.19.13 snapshot.
diff --git a/include/linux/icmp.h b/include/linux/icmp.h
new file mode 100644
index 0000000..efc1849
--- /dev/null
+++ b/include/linux/icmp.h
@@ -0,0 +1,27 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Definitions for the ICMP protocol.
+ *
+ * Version: @(#)icmp.h 1.0.3 04/28/93
+ *
+ * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _LINUX_ICMP_H
+#define _LINUX_ICMP_H
+
+#include <linux/skbuff.h>
+#include <uapi/linux/icmp.h>
+
+static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb)
+{
+ return (struct icmphdr *)skb_transport_header(skb);
+}
+#endif /* _LINUX_ICMP_H */