? share/man/man9/obj
Index: share/man/man9/Makefile
===================================================================
RCS file: /cvs/src/share/man/man9/Makefile,v
retrieving revision 1.255
diff -u -p -r1.255 Makefile
--- share/man/man9/Makefile	20 Nov 2015 11:15:07 -0000	1.255
+++ share/man/man9/Makefile	20 Nov 2015 13:11:18 -0000
@@ -273,7 +273,8 @@ MLINKS+=ml_init.9 ml_enqueue.9 ml_init.9
 	ml_init.9 ml_enlist.9 ml_init.9 ml_dechain.9 \
 	ml_init.9 ml_filter.9 ml_init.9 ml_len.9 ml_init.9 ml_empty.9 \
 	ml_init.9 ml_purge.9 \
-	ml_init.9 MBUF_LIST_INITIALIZER.9 ml_init.9 MBUF_LIST_FOREACH.9
+	ml_init.9 MBUF_LIST_INITIALIZER.9 ml_init.9 MBUF_LIST_FIRST.9 \
+	ml_init.9 MBUF_LIST_NEXT.9 ml_init.9 MBUF_LIST_FOREACH.9
 MLINKS+=mountroothook_establish.9 mountroothook_disestablish.9
 MLINKS+=mutex.9 mtx_init.9 mutex.9 mtx_enter.9 mutex.9 mtx_leave.9 \
 	mutex.9 MUTEX_ASSERT_LOCKED.9 mutex.9 MUTEX_ASSERT_UNLOCKED.9 \
Index: share/man/man9/ml_init.9
===================================================================
RCS file: /cvs/src/share/man/man9/ml_init.9,v
retrieving revision 1.8
diff -u -p -r1.8 ml_init.9
--- share/man/man9/ml_init.9	2 Nov 2015 09:21:48 -0000	1.8
+++ share/man/man9/ml_init.9	20 Nov 2015 13:11:18 -0000
@@ -27,6 +27,8 @@
 .Nm ml_len ,
 .Nm ml_empty ,
 .Nm MBUF_LIST_INITIALIZER ,
+.Nm MBUF_LIST_FIRST ,
+.Nm MBUF_LIST_NEXT ,
 .Nm MBUF_LIST_FOREACH
 .Nd mbuf list API
 .Sh SYNOPSIS
@@ -57,6 +59,10 @@
 .Fn ml_purge "struct mbuf_list *ml"
 .Ft struct mbuf_list
 .Fn MBUF_LIST_INITIALIZER
+.Ft struct mbuf *
+.Fn MBUF_LIST_FIRST "struct mbuf_list *ml"
+.Ft struct mbuf *
+.Fn MBUF_LIST_NEXT "struct mbuf *m"
 .Fn MBUF_LIST_FOREACH "struct mbuf_list *ml" "VARNAME"
 .Sh DESCRIPTION
 The mbuf list API provides implementations of data structures and operations
@@ -138,6 +144,13 @@ mbuf list is empty.
 Free all the mbufs on the
 .Fa ml
 mbuf list.
+.It Fn MBUF_LIST_FIRST "struct mbuf_list *ml"
+Access the first mbuf in the
+.Fa ml
+mbuf list for traversal.
+.It Fn MBUF_LIST_NEXT "struct mbuf *m"
+Access the next mbuf in the mbuf list after
+.Fa m .
 .It Fn MBUF_LIST_FOREACH "struct mbuf_list *ml" "VARNAME"
 A convenience macro that can be used to iterate over the contents of the
 .Fa ml
@@ -158,6 +171,8 @@ Note that it is unsafe to modify the lis
 .Fn ml_empty ,
 .Fn ml_purge ,
 .Fn MBUF_LIST_INITIALIZER ,
+.Fn MBUF_LIST_FIRST ,
+.Fn MBUF_LIST_NEXT ,
 and
 .Fn MBUF_LIST_FOREACH
 can be called during autoconf, from process context, or from interrupt context.
@@ -190,5 +205,15 @@ return a non-zero value if the list is e
 .Pp
 .Fn ml_purge
 returns the number of mbufs that were freed.
+.Pp
+.Fn MBUF_LIST_FIRST
+returns the first mbuf in the mbuf list, or
+.Dv NULL
+if the list is empty.
+.Pp
+.Fn MBUF_LIST_NEXT
+returns the next mbuf in the mbuf list, or
+.Dv NULL
+if the end of the list has been reached.
 .Sh SEE ALSO
 .Xr mbuf 9
Index: sys/sys/mbuf.h
===================================================================
RCS file: /cvs/src/sys/sys/mbuf.h,v
retrieving revision 1.203
diff -u -p -r1.203 mbuf.h
--- sys/sys/mbuf.h	20 Nov 2015 03:35:23 -0000	1.203
+++ sys/sys/mbuf.h	20 Nov 2015 13:11:19 -0000
@@ -504,8 +504,13 @@ unsigned int		ml_purge(struct mbuf_list 
 #define	ml_len(_ml)		((_ml)->ml_len)
 #define	ml_empty(_ml)		((_ml)->ml_len == 0)
 
-#define MBUF_LIST_FOREACH(_ml, _m) \
-	for ((_m) = (_ml)->ml_head; (_m) != NULL; (_m) = (_m)->m_nextpkt)
+#define MBUF_LIST_FIRST(_ml)	((_ml)->ml_head)
+#define MBUF_LIST_NEXT(_m)	((_m)->m_nextpkt)
+
+#define MBUF_LIST_FOREACH(_ml, _m)					\
+	for ((_m) = MBUF_LIST_FIRST(_ml);				\
+	    (_m) != NULL;						\
+	    (_m) = MBUF_LIST_NEXT(_m))
 
 /*
  * mbuf queues