Index: sys/mbuf.h
===================================================================
RCS file: /home/ncvs/src/sys/sys/mbuf.h,v
retrieving revision 1.122
diff -u -r1.122 mbuf.h
--- sys/mbuf.h	9 May 2003 02:15:52 -0000	1.122
+++ sys/mbuf.h	4 Jun 2003 03:45:59 -0000
@@ -404,6 +404,22 @@
 } while (0)
 
 /*
+ * Get a mbuf in a generic way.
+ * -m:  	mbuf to allocate
+ * -len: 	size (optional)
+ * -type: 	type of the mbuf (MT_DATA etc)
+ * -ispkthdr: 	if it should be a packet header (M_PKTHDR or 0)
+ */
+#define M_GET_GENERIC(m, len, how, type, ispkthdr) do {	\
+	if ((len) >= MINCLSIZE)					\
+		m = m_getcl(how, type, ispkthdr);		\
+	else if ((ispkthdr) & M_PKTHDR)				\
+		m = m_gethdr(how, type);			\
+	else							\
+		m = m_get(how, type);				\
+} while (0)
+
+/*
  * Change mbuf to new type.
  * This is a relatively expensive operation and should be avoided.
  */