diff --git a/sys/arch/mips/sibyte/dev/sbmac.c b/sys/arch/mips/sibyte/dev/sbmac.c
index a93ffa1dc0ec..7571f27a6d11 100644
--- a/sys/arch/mips/sibyte/dev/sbmac.c
+++ b/sys/arch/mips/sibyte/dev/sbmac.c
@@ -1,4 +1,4 @@
-/* $NetBSD: sbmac.c,v 1.11 2003/09/26 13:34:56 simonb Exp $ */
+/* $NetBSD: sbmac.c,v 1.12 2003/10/31 03:32:19 simonb Exp $ */
 
 /*
  * Copyright 2000, 2001
@@ -33,7 +33,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sbmac.c,v 1.11 2003/09/26 13:34:56 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sbmac.c,v 1.12 2003/10/31 03:32:19 simonb Exp $");
 
 #include "bpfilter.h"
 #include "opt_inet.h"
@@ -832,7 +832,6 @@ sbdma_rx_process(struct sbmac_softc *sc, sbmacdma_t *d)
 	int hwidx;
 	sbdmadscr_t *dsc;
 	struct mbuf *m;
-	struct ether_header *eh;
 	int len;
 
 	struct ifnet *ifp = &(sc->sc_ethercom.ec_if);
@@ -888,7 +887,6 @@ sbdma_rx_process(struct sbmac_softc *sc, sbmacdma_t *d)
 			m->m_pkthdr.len = m->m_len = len;
 
 			ifp->if_ipackets++;
-			eh = mtod(m, struct ether_header *);
 			m->m_pkthdr.rcvif = ifp;
 
 
@@ -951,7 +949,6 @@ sbdma_tx_process(struct sbmac_softc *sc, sbmacdma_t *d)
 {
 	int curidx;
 	int hwidx;
-	sbdmadscr_t *dsc;
 	struct mbuf *m;
 
 	struct ifnet *ifp = &(sc->sc_ethercom.ec_if);
@@ -986,7 +983,6 @@ sbdma_tx_process(struct sbmac_softc *sc, sbmacdma_t *d)
 		 * Otherwise, get the packet's mbuf ptr back
 		 */
 
-		dsc = &(d->sbdma_dscrtable[curidx]);
 		m = d->sbdma_ctxtable[curidx];
 		d->sbdma_ctxtable[curidx] = NULL;
 
diff --git a/sys/arch/pmax/dev/dc.c b/sys/arch/pmax/dev/dc.c
index dcfd6a123e12..8d703172846b 100644
--- a/sys/arch/pmax/dev/dc.c
+++ b/sys/arch/pmax/dev/dc.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: dc.c,v 1.76 2003/09/28 17:25:07 chs Exp $	*/
+/*	$NetBSD: dc.c,v 1.77 2003/10/31 03:32:19 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1992, 1993
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: dc.c,v 1.76 2003/09/28 17:25:07 chs Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dc.c,v 1.77 2003/10/31 03:32:19 simonb Exp $");
 
 /*
  * devDC7085.c --
@@ -707,7 +707,6 @@ dcparam(tp, t)
 	struct termios *t;
 {
 	struct dc_softc *sc;
-	dcregs *dcaddr;
 
 
 	/*
@@ -715,7 +714,6 @@ dcparam(tp, t)
 	 * cold_dcparam() for argument checking and execution.
 	 */
 	sc = dc_cd.cd_devs[DCUNIT(tp->t_dev)];
-	dcaddr = (dcregs *)sc->dc_pdma[0].p_addr;
 	return (cold_dcparam(tp, t, sc));
 
 }
@@ -1022,12 +1020,11 @@ dcmctl(dev, bits, how)
 	struct dc_softc *sc;
 	dcregs *dcaddr;
 	int line, mbits;
-	int b, s;
+	int s;
 	int tcr, msr;
 
 	line = DCLINE(dev);
 	sc = dc_cd.cd_devs[DCUNIT(dev)];
-	b = 1 << line;
 	dcaddr = (dcregs *)sc->dc_pdma[line].p_addr;
 	s = spltty();
 	/* only channel 2 has modem control on a DECstation 2100/3100 */
diff --git a/sys/arch/pmax/dev/ims332.c b/sys/arch/pmax/dev/ims332.c
index ea9d63e78e5b..a5e3ccd6c614 100644
--- a/sys/arch/pmax/dev/ims332.c
+++ b/sys/arch/pmax/dev/ims332.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ims332.c,v 1.15 2003/08/07 16:29:09 agc Exp $	*/
+/*	$NetBSD: ims332.c,v 1.16 2003/10/31 03:32:19 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1992, 1993, 1995
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: ims332.c,v 1.15 2003/08/07 16:29:09 agc Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ims332.c,v 1.16 2003/10/31 03:32:19 simonb Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -283,13 +283,10 @@ int
 ims332_video_off(fi)
 	struct fbinfo *fi;
 {
-	u_char *cmap_bits;
 
 	if (fi -> fi_blanked)
 		return 0;
 
-	cmap_bits = (u_char *)fi -> fi_cmap_bits;
-
 	ims332_write_register (fi, IMS332_REG_LUT_BASE, 0);
 
 	ims332_write_register (fi, IMS332_REG_COLOR_MASK, 0);
diff --git a/sys/arch/pmax/dev/mfb.c b/sys/arch/pmax/dev/mfb.c
index 1dc155c6e9dc..e8f9c00d407d 100644
--- a/sys/arch/pmax/dev/mfb.c
+++ b/sys/arch/pmax/dev/mfb.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mfb.c,v 1.50 2003/08/07 16:29:09 agc Exp $	*/
+/*	$NetBSD: mfb.c,v 1.51 2003/10/31 03:32:19 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1992, 1993
@@ -77,7 +77,7 @@
  */
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: mfb.c,v 1.50 2003/08/07 16:29:09 agc Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mfb.c,v 1.51 2003/10/31 03:32:19 simonb Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -697,13 +697,10 @@ bt455_video_off(fi)
 {
 	int i;
 	bt455_regmap_t *regs = (bt455_regmap_t *)(fi -> fi_vdac);
-	u_char *cmap;
 
 	if (fi -> fi_blanked)
 		return 0;
 
-	cmap = (u_char *)(fi -> fi_cmap_bits);
-
 	/* Zap colormap entries 0 (background) and 1 (foreground) */
 	BT455_SELECT_ENTRY(regs, 0);
 	for (i = 0; i < 6; i++) {
diff --git a/sys/arch/pmax/pmax/machdep.c b/sys/arch/pmax/pmax/machdep.c
index 22b9926a33d8..c23321fe1cc5 100644
--- a/sys/arch/pmax/pmax/machdep.c
+++ b/sys/arch/pmax/pmax/machdep.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: machdep.c,v 1.206 2003/09/26 16:00:28 simonb Exp $	*/
+/*	$NetBSD: machdep.c,v 1.207 2003/10/31 03:32:19 simonb Exp $	*/
 
 /*
  * Copyright (c) 1992, 1993
@@ -77,7 +77,7 @@
  */
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.206 2003/09/26 16:00:28 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.207 2003/10/31 03:32:19 simonb Exp $");
 
 #include "fs_mfs.h"
 #include "opt_ddb.h"
@@ -207,7 +207,6 @@ mach_init(argc, argv, code, cv, bim, bip)
 	caddr_t kernend, v;
 	unsigned size;
 #if NKSYMS || defined(DDB) || defined(LKM)
-	int nsym = 0;
 	caddr_t ssym = 0;
 	struct btinfo_symtab *bi_syms;
 	struct exec *aout;		/* XXX backwards compatilbity for DDB */
@@ -236,7 +235,6 @@ mach_init(argc, argv, code, cv, bim, bip)
 
 	/* Was it a valid bootinfo symtab info? */
 	if (bi_syms != NULL) {
-		nsym = bi_syms->nsym;
 		ssym = (caddr_t)bi_syms->ssym;
 		esym = (caddr_t)bi_syms->esym;
 		kernend = (caddr_t)mips_round_page(esym);
@@ -247,7 +245,6 @@ mach_init(argc, argv, code, cv, bim, bip)
 	 */
 	/* Exec header and symbols? */
 	else if (aout->a_midmag == 0x07018b00 && (i = aout->a_syms) != 0) {
-		nsym = *(long *)end = i;
 		ssym = end;
 		i += (*(long *)(end + i + 4) + 3) & ~3;		/* strings */
 		esym = end + i + 4;
diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 3c10a5fd2657..c43519aeafd5 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_sysctl.c,v 1.151 2003/10/21 22:55:47 thorpej Exp $	*/
+/*	$NetBSD: kern_sysctl.c,v 1.152 2003/10/31 03:32:20 simonb Exp $	*/
 
 /*-
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -39,7 +39,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.151 2003/10/21 22:55:47 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.152 2003/10/31 03:32:20 simonb Exp $");
 
 #include "opt_ddb.h"
 #include "opt_insecure.h"
@@ -1756,13 +1756,12 @@ sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep)
 	struct proc *p;
 	struct lwp *l;
 	char *where, *dp;
-	int type, pid, elem_size, elem_count;
+	int pid, elem_size, elem_count;
 	int buflen, needed, error;
 
 	dp = where = vwhere;
 	buflen = where != NULL ? *sizep : 0;
 	error = needed = 0;
-	type = name[0];
 
 	if (namelen != 4)
 		return (EINVAL);