Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/kern/uipc_mbuf.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/kern/uipc_mbuf.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.158.4.1
retrieving revision 1.158.4.1.6.1
diff -u -p -r1.158.4.1 -r1.158.4.1.6.1
--- src/sys/kern/uipc_mbuf.c	2015/02/09 09:46:01	1.158.4.1
+++ src/sys/kern/uipc_mbuf.c	2018/04/05 11:50:17	1.158.4.1.6.1
@@ -1,4 +1,4 @@
-/*	$NetBSD: uipc_mbuf.c,v 1.158.4.1 2015/02/09 09:46:01 martin Exp $	*/
+/*	$NetBSD: uipc_mbuf.c,v 1.158.4.1.6.1 2018/04/05 11:50:17 martin Exp $	*/
 
 /*-
  * Copyright (c) 1999, 2001 The NetBSD Foundation, Inc.
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uipc_mbuf.c,v 1.158.4.1 2015/02/09 09:46:01 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uipc_mbuf.c,v 1.158.4.1.6.1 2018/04/05 11:50:17 martin Exp $");
 
 #include "opt_mbuftrace.h"
 #include "opt_nmbclusters.h"
@@ -453,6 +453,16 @@ mb_ctor(void *arg, void *object, int fla
 	return (0);
 }
 
+void
+m_pkthdr_remove(struct mbuf *m)
+{
+	KASSERT(m->m_flags & M_PKTHDR);
+
+	m_tag_delete_chain(m, NULL);
+	m->m_flags &= ~M_PKTHDR;
+	memset(&m->m_pkthdr, 0, sizeof(m->m_pkthdr));
+}
+
 /*
  * Add mbuf to the end of a chain
  */