diff --git a/sys/dev/ie/if_ie.c b/sys/dev/ie/if_ie.c
index d4e115569540..fbb1d5e11add 100644
--- a/sys/dev/ie/if_ie.c
+++ b/sys/dev/ie/if_ie.c
@@ -175,7 +175,7 @@ static int ieioctl(struct ifnet *ifp, int command, caddr_t data);
 static void iestart(struct ifnet *ifp);
 static void sl_reset_586(int unit);
 static void sl_chan_attn(int unit);
-static void iereset(int unit, int dummy);
+static void iereset(int unit);
 static void ie_readframe(int unit, struct ie_softc *ie, int bufno);
 static void ie_drop_packet_buffer(int unit, struct ie_softc *ie);
 static void sl_read_ether(int unit, unsigned char addr[6]);
@@ -745,7 +745,7 @@ static inline int ie_packet_len(int unit, struct ie_softc *ie) {
 #endif
       log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n",
 	  unit, ie->rbhead);
-      iereset(unit, 0);
+      iereset(unit);
       return -1;
     }
 
@@ -1055,7 +1055,7 @@ static void ie_drop_packet_buffer(int unit, struct ie_softc *ie) {
 #endif
       log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n",
 	  unit, ie->rbhead);
-      iereset(unit, 0);
+      iereset(unit);
       return;
     }
 
@@ -1281,8 +1281,8 @@ void sl_read_ether(unit, addr)
 
 
 static void
-iereset(unit, dummy)
-	int unit, dummy;
+iereset(unit)
+	int unit;
 {
   int s = splimp();
 
diff --git a/sys/i386/isa/bt742a.c b/sys/i386/isa/bt742a.c
index 58b53f91b51b..9a53a7a61285 100644
--- a/sys/i386/isa/bt742a.c
+++ b/sys/i386/isa/bt742a.c
@@ -44,6 +44,10 @@
 #define	NBT 1
 #endif /*KERNEL */
 
+#ifndef NetBSD
+typedef timeout_func_t timeout_t;
+#endif
+
 typedef unsigned long int physaddr;
 
 /*
@@ -717,7 +721,7 @@ btintr(unit)
 		}
 		wmbi->stat = BT_MBI_FREE;
 		if (ccb) {
-			untimeout(bt_timeout, (caddr_t)ccb);
+			untimeout((timeout_t)bt_timeout, (caddr_t)ccb);
 			bt_done(unit, ccb);
 		}
 		/* Set the IN mail Box pointer for next */ bt_nextmbx(wmbi, wmbx, mbi);
@@ -1359,7 +1363,7 @@ bt_scsi_cmd(xs)
 	 */
 	SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_sent\n"));
 	if (!(flags & SCSI_NOMASK)) {
-		timeout(bt_timeout, (caddr_t)ccb, (xs->timeout * hz) / 1000);
+		timeout((timeout_t)bt_timeout, (caddr_t)ccb, (xs->timeout * hz) / 1000);
 		return (SUCCESSFULLY_QUEUED);
 	}
 	/*
@@ -1404,13 +1408,13 @@ bt_poll(unit, xs, ccb)
 		 * accounting for the fact that the clock is not running yet
 		 * by taking out the clock queue entry it makes.
 		 */
-		bt_timeout((caddr_t)ccb, 0);
+		bt_timeout((caddr_t)ccb);
 
 		/*
 		 * because we are polling, take out the timeout entry
 		 * bt_timeout made
 		 */
-		untimeout(bt_timeout, (caddr_t)ccb);
+		untimeout((timeout_t)bt_timeout, (caddr_t)ccb);
 		count = 2000;
 		while (count) {
 			/*
@@ -1431,7 +1435,7 @@ bt_poll(unit, xs, ccb)
 			 * We timed out again...  This is bad.  Notice that
 			 * this time there is no clock queue entry to remove.
 			 */
-			bt_timeout((caddr_t)ccb, 0);
+			bt_timeout((caddr_t)ccb);
 		}
 	}
 	if (xs->error)
@@ -1485,7 +1489,7 @@ bt_timeout(caddr_t arg1)
 		bt_send_mbo(unit, ~SCSI_NOMASK,
 		    BT_MBO_ABORT, ccb);
 		/* 2 secs for the abort */
-		timeout(bt_timeout, (caddr_t)ccb, 2 * hz);
+		timeout((timeout_t)bt_timeout, (caddr_t)ccb, 2 * hz);
 		ccb->flags = CCB_ABORTED;
 	}
 	splx(s);
diff --git a/sys/i386/isa/if_ie.c b/sys/i386/isa/if_ie.c
index d4e115569540..fbb1d5e11add 100644
--- a/sys/i386/isa/if_ie.c
+++ b/sys/i386/isa/if_ie.c
@@ -175,7 +175,7 @@ static int ieioctl(struct ifnet *ifp, int command, caddr_t data);
 static void iestart(struct ifnet *ifp);
 static void sl_reset_586(int unit);
 static void sl_chan_attn(int unit);
-static void iereset(int unit, int dummy);
+static void iereset(int unit);
 static void ie_readframe(int unit, struct ie_softc *ie, int bufno);
 static void ie_drop_packet_buffer(int unit, struct ie_softc *ie);
 static void sl_read_ether(int unit, unsigned char addr[6]);
@@ -745,7 +745,7 @@ static inline int ie_packet_len(int unit, struct ie_softc *ie) {
 #endif
       log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n",
 	  unit, ie->rbhead);
-      iereset(unit, 0);
+      iereset(unit);
       return -1;
     }
 
@@ -1055,7 +1055,7 @@ static void ie_drop_packet_buffer(int unit, struct ie_softc *ie) {
 #endif
       log(LOG_ERR, "ie%d: receive descriptors out of sync at %d\n",
 	  unit, ie->rbhead);
-      iereset(unit, 0);
+      iereset(unit);
       return;
     }
 
@@ -1281,8 +1281,8 @@ void sl_read_ether(unit, addr)
 
 
 static void
-iereset(unit, dummy)
-	int unit, dummy;
+iereset(unit)
+	int unit;
 {
   int s = splimp();
 
diff --git a/sys/i386/isa/if_is.c b/sys/i386/isa/if_is.c
index 2df9bb4779e1..fc0dcaee9908 100644
--- a/sys/i386/isa/if_is.c
+++ b/sys/i386/isa/if_is.c
@@ -279,7 +279,7 @@ int type=0;
  * Reset of interface.
  */
 static void
-is_reset(int unit, int uban)
+is_reset(int unit)
 {
 	int s;
 	struct is_softc *is = &is_softc[unit];
@@ -395,7 +395,7 @@ is_watchdog(unit)
         int unit;
 {
         log(LOG_ERR, "is%d: device timeout\n", unit);
-        is_reset(unit, 0);
+        is_reset(unit);
 }
 
 
@@ -695,13 +695,13 @@ isintr(unit)
 		if (!(isr&RXON)) {
 			printf("is%d: !(isr&RXON)\n", unit);
 			is->arpcom.ac_if.if_ierrors++;
-			is_reset(unit, 0);
+			is_reset(unit);
 			return;
 		}
 		if (!(isr&TXON)) {
 			printf("is%d: !(isr&TXON)\n", unit);
 			is->arpcom.ac_if.if_oerrors++;
-			is_reset(unit, 0);
+			is_reset(unit);
 			return;
 		}
 
@@ -791,7 +791,7 @@ static inline void is_rint(int unit)
 			is->last_rd = rmd;
 			printf("is%d: Chained buffer\n",unit);
 			if ((cdm->flags & (OWN|ERR|STP|ENP)) != ENP) {
-				is_reset(unit, 0);
+				is_reset(unit);
 				return;
 			}
 		}else
diff --git a/sys/i386/isa/ultra14f.c b/sys/i386/isa/ultra14f.c
index b9017444d9c1..aa999174c0e3 100644
--- a/sys/i386/isa/ultra14f.c
+++ b/sys/i386/isa/ultra14f.c
@@ -50,6 +50,10 @@
 #define NUHA 1
 #endif /*KERNEL */
 
+#ifndef NetBSD
+typedef timeout_func_t timeout_t;
+#endif
+
 typedef struct {
 	unsigned char addr[4];
 } physaddr;
@@ -525,7 +529,7 @@ uhaintr(unit)
 			printf("uha: BAD MSCP RETURNED\n");
 			return (0);	/* whatever it was, it'll timeout */
 		}
-		untimeout(uha_timeout, (caddr_t)mscp);
+		untimeout((timeout_t)uha_timeout, (caddr_t)mscp);
 
 		uha_done(unit, mscp);
 	}
@@ -1046,7 +1050,7 @@ uha_scsi_cmd(xs)
 	if (!(flags & SCSI_NOMASK)) {
 		s = splbio();
 		uha_send_mbox(unit, mscp);
-		timeout(uha_timeout, (caddr_t)mscp, (xs->timeout * hz) / 1000);
+		timeout((timeout_t)uha_timeout, (caddr_t)mscp, (xs->timeout * hz) / 1000);
 		splx(s);
 		SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_sent\n"));
 		return (SUCCESSFULLY_QUEUED);
@@ -1103,7 +1107,7 @@ uha_timeout(caddr_t arg1)
 		uha_done(unit, mscp, FAIL);
 	} else {		/* abort the operation that has timed out */
 		printf("\n");
-		timeout(uha_timeout, (caddr_t)mscp, 2 * hz);
+		timeout((timeout_t)uha_timeout, (caddr_t)mscp, 2 * hz);
 		mscp->flags = MSCP_ABORTED;
 	}
 	splx(s);
diff --git a/sys/i386/isa/wt.c b/sys/i386/isa/wt.c
index 5ed78a2c5e8d..21a6ed93578b 100644
--- a/sys/i386/isa/wt.c
+++ b/sys/i386/isa/wt.c
@@ -773,7 +773,7 @@ static void wtclock (wtinfo_t *t)
 		t->flags |= TPTIMER;
 		/* Some controllers seem to lose dma interrupts too often.
 		 * To make the tape stream we need 1 tick timeout. */
-		timeout (wtimer, (caddr_t)t, (t->flags & TPACTIVE) ? 1 : hz);
+		timeout ((timeout_func_t)wtimer, (caddr_t)t, (t->flags & TPACTIVE) ? 1 : hz);
 	}
 }