diff --git a/sys/dev/cxgb/cxgb_sge.c b/sys/dev/cxgb/cxgb_sge.c
index 2cfad262673..a622fcfef56 100644
--- a/sys/dev/cxgb/cxgb_sge.c
+++ b/sys/dev/cxgb/cxgb_sge.c
@@ -795,12 +795,10 @@ free_rx_bufs(adapter_t *sc, struct sge_fl *q)
 			bus_dmamap_unload(q->entry_tag, d->map);
 			bus_dmamap_destroy(q->entry_tag, d->map);
 			if (q->zone == zone_pack) {
-				m_init(d->m, zone_pack, MCLBYTES,
-				    M_NOWAIT, MT_DATA, M_EXT);
+				m_init(d->m, M_NOWAIT, MT_DATA, M_EXT);
 				uma_zfree(zone_pack, d->m);
 			} else {
-				m_init(d->m, zone_mbuf, MLEN,
-				    M_NOWAIT, MT_DATA, 0);
+				m_init(d->m, M_NOWAIT, MT_DATA, 0);
 				uma_zfree(zone_mbuf, d->m);
 				uma_zfree(q->zone, d->rxsd_cl);
 			}			
@@ -2725,7 +2723,7 @@ get_packet(adapter_t *adap, unsigned int drop_thres, struct sge_qset *qs,
 		if ((sopeop == RSPQ_SOP_EOP) ||
 		    (sopeop == RSPQ_SOP))
 			flags |= M_PKTHDR;
-		m_init(m, fl->zone, fl->buf_size, M_NOWAIT, MT_DATA, flags);
+		m_init(m, M_NOWAIT, MT_DATA, flags);
 		if (fl->zone == zone_pack) {
 			/*
 			 * restore clobbered data pointer
diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c
index b43cd5fdf10..0c3644d98af 100644
--- a/sys/dev/cxgbe/t4_sge.c
+++ b/sys/dev/cxgbe/t4_sge.c
@@ -1570,7 +1570,7 @@ get_scatter_segment(struct adapter *sc, struct sge_fl *fl, int fr_offset,
 		MPASS(clm != NULL);
 		m = (struct mbuf *)(sd->cl + sd->nmbuf * MSIZE);
 		/* No bzero required */
-		if (m_init(m, NULL, 0, M_NOWAIT, MT_DATA,
+		if (m_init(m, M_NOWAIT, MT_DATA,
 		    fr_offset == 0 ? M_PKTHDR | M_NOFREE : M_NOFREE))
 			return (NULL);
 		fl->mbuf_inlined++;
diff --git a/sys/kern/kern_mbuf.c b/sys/kern/kern_mbuf.c
index 55964398b6a..148b52f8b9d 100644
--- a/sys/kern/kern_mbuf.c
+++ b/sys/kern/kern_mbuf.c
@@ -435,7 +435,7 @@ mb_ctor_mbuf(void *mem, int size, void *arg, int how)
 	m = (struct mbuf *)mem;
 	flags = args->flags;
 
-	error = m_init(m, NULL, size, how, type, flags);
+	error = m_init(m, how, type, flags);
 
 	return (error);
 }
@@ -635,7 +635,7 @@ mb_ctor_pack(void *mem, int size, void *arg, int how)
 	trash_ctor(m->m_ext.ext_buf, MCLBYTES, arg, how);
 #endif
 
-	error = m_init(m, NULL, size, how, type, flags);
+	error = m_init(m, how, type, flags);
 
 	/* m_ext is already initialized. */
 	m->m_data = m->m_ext.ext_buf;
diff --git a/sys/netinet/tcp_pcap.c b/sys/netinet/tcp_pcap.c
index f0c651dab55..41a7fbfc958 100644
--- a/sys/netinet/tcp_pcap.c
+++ b/sys/netinet/tcp_pcap.c
@@ -341,7 +341,7 @@ tcp_pcap_add(struct tcphdr *th, struct mbuf *m, struct mbufq *queue)
 
 			n = mhead;
 			tcp_pcap_m_freem(n->m_next);
-			m_init(n, NULL, 0, M_NOWAIT, MT_DATA, 0);
+			m_init(n, M_NOWAIT, MT_DATA, 0);
 		}
 	}
 
diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h
index a4aa0bcf86b..8d35f33b12f 100644
--- a/sys/sys/mbuf.h
+++ b/sys/sys/mbuf.h
@@ -618,8 +618,7 @@ m_getzone(int size)
  * should go away with constant propagation for !MGETHDR.
  */
 static __inline int
-m_init(struct mbuf *m, uma_zone_t zone __unused, int size __unused, int how,
-    short type, int flags)
+m_init(struct mbuf *m, int how, short type, int flags)
 {
 	int error;