From 691e50f2575a12edd49704ff0cf72baa37825af6 Mon Sep 17 00:00:00 2001
From: claudio <claudio@openbsd.org>
Date: Thu, 14 Aug 2008 19:39:40 +0000
Subject: [PATCH] Kill the _MCLDEREFERENCE() macro it was only used once and it
 should be only used once -- in m_free(). Removed so that people don't get
 stupid ideas. OK thib@

---
 sys/kern/uipc_mbuf.c | 11 +++++++----
 sys/sys/mbuf.h       |  9 +--------
 2 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index 64258a31c8f..c832de261bb 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uipc_mbuf.c,v 1.91 2008/08/08 08:54:08 thib Exp $	*/
+/*	$OpenBSD: uipc_mbuf.c,v 1.92 2008/08/14 19:39:40 claudio Exp $	*/
 /*	$NetBSD: uipc_mbuf.c,v 1.15.4.1 1996/06/13 17:11:44 cgd Exp $	*/
 
 /*
@@ -271,9 +271,12 @@ m_free(struct mbuf *m)
 	if (m->m_flags & M_PKTHDR)
 		m_tag_delete_chain(m);
 	if (m->m_flags & M_EXT) {
-		if (MCLISREFERENCED(m))
-			_MCLDEREFERENCE(m);
-		else if (m->m_flags & M_CLUSTER)
+		if (MCLISREFERENCED(m)) {
+			m->m_ext.ext_nextref->m_ext.ext_prevref =
+			    m->m_ext.ext_prevref;
+			m->m_ext.ext_prevref->m_ext.ext_nextref =
+			    m->m_ext.ext_nextref;
+		} else if (m->m_flags & M_CLUSTER)
 			pool_put(&mclpool, m->m_ext.ext_buf);
 		else if (m->m_ext.ext_free)
 			(*(m->m_ext.ext_free))(m->m_ext.ext_buf,
diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h
index ffa31c10679..0a63337550a 100644
--- a/sys/sys/mbuf.h
+++ b/sys/sys/mbuf.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mbuf.h,v 1.101 2008/08/07 18:33:49 henning Exp $	*/
+/*	$OpenBSD: mbuf.h,v 1.102 2008/08/14 19:39:40 claudio Exp $	*/
 /*	$NetBSD: mbuf.h,v 1.19 1996/02/09 18:25:14 christos Exp $	*/
 
 /*
@@ -239,13 +239,6 @@ struct mbuf {
 
 #define	MCLISREFERENCED(m)	((m)->m_ext.ext_nextref != (m))
 
-#define	_MCLDEREFERENCE(m)	do {					\
-		(m)->m_ext.ext_nextref->m_ext.ext_prevref =		\
-			(m)->m_ext.ext_prevref;				\
-		(m)->m_ext.ext_prevref->m_ext.ext_nextref =		\
-			(m)->m_ext.ext_nextref;				\
-	} while (/* CONSTCOND */ 0)
-
 #define	_MCLADDREFERENCE(o, n)	do {					\
 		(n)->m_flags |= ((o)->m_flags & (M_EXT|M_CLUSTER));	\
 		(n)->m_ext.ext_nextref = (o)->m_ext.ext_nextref;	\
-- 
2.20.1