diff --git a/boot/bootimage.c b/boot/bootimage.c
index 6c3ab3590..2e3754cfe 100644
--- a/boot/bootimage.c
+++ b/boot/bootimage.c
@@ -424,7 +424,7 @@ static void restore_screen(void)
                 sizeof(boot_tty_info));
 
         if(boot_tty_info.magic == TTYMAGIC) {
-                if(boot_tty_info.flags & (BTIF_CONSORIGIN|BTIF_CONSCURSOR) ==
+                if((boot_tty_info.flags & (BTIF_CONSORIGIN|BTIF_CONSCURSOR)) ==
 			(BTIF_CONSORIGIN|BTIF_CONSCURSOR)) {
 			int line;
 			raw_copy(mon2abs(consolescreen), 
diff --git a/drivers/atl2/atl2.c b/drivers/atl2/atl2.c
index 0941b8d64..0c7d918cd 100644
--- a/drivers/atl2/atl2.c
+++ b/drivers/atl2/atl2.c
@@ -1307,7 +1307,6 @@ int main(int argc, char **argv)
 	/* Driver task.
 	 */
 	message m;
-	sigset_t set;
 	int r;
 
 	/* Initialize SEF. */
diff --git a/drivers/dec21140A/dec21140A.c b/drivers/dec21140A/dec21140A.c
index 1feccf415..73851cfea 100644
--- a/drivers/dec21140A/dec21140A.c
+++ b/drivers/dec21140A/dec21140A.c
@@ -260,15 +260,15 @@ PRIVATE void do_conf(const message * mp)
     }
   } else {			/* Port number is out of range */ 
     port = ENXIO;
+    dep = NULL;
   }
 
   reply_mess.m_type = DL_CONF_REPLY;
   reply_mess.m3_i1 = port;
   reply_mess.m3_i2 = DE_PORT_NR;
-  /* FIXME: if port number is out of range, this uses
-   * uninitialized variable 'dep'.
-   */
-  *(ether_addr_t *) reply_mess.m3_ca1 = dep->de_address;
+  if(dep != NULL){
+    *(ether_addr_t *) reply_mess.m3_ca1 = dep->de_address;
+  }
   
   if (send(mp->m_source, &reply_mess) != OK)
     panic(str_SendErrMsg, mp->m_source);
@@ -291,7 +291,7 @@ PRIVATE void do_get_name(message *mp)
 PRIVATE void do_reply(dpeth_t * dep, int err, int may_block)
 {
   message reply;
-  int status = FALSE;
+  int status = 0;
 
   if (dep->de_flags & DEF_ACK_SEND) status |= DL_PACK_SEND;
   if (dep->de_flags & DEF_ACK_RECV) status |= DL_PACK_RECV;
@@ -620,7 +620,6 @@ PRIVATE void de_first_init(dpeth_t *dep)
   int i,j,r;
   vir_bytes descr_vir = dep->sendrecv_descr_buf;
   vir_bytes buffer_vir = dep->sendrecv_buf;
-  de_descr_t *phys_descr;
   de_loc_descr_t *loc_descr;
   u32_t temp;
 
diff --git a/drivers/orinoco/hermes.c b/drivers/orinoco/hermes.c
index a33dd9176..39996d76e 100644
--- a/drivers/orinoco/hermes.c
+++ b/drivers/orinoco/hermes.c
@@ -624,8 +624,8 @@ int hermes_read_ltv (hermes_t * hw, int bap, u16_t rid, unsigned bufsize,
 
 	if (rtype != rid) {
 		printf("hermes @ %lx: hermes_read_ltv(): rid  (0x%04x)",
-			hw->iobase);
-		printf("does not match type (0x%04x)\n", rid, rtype);
+			hw->iobase, rid);
+		printf("does not match type (0x%04x)\n", rtype);
 	}
 
 	if (HERMES_RECLEN_TO_BYTES (rlength) > bufsize) {
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 1089a791e..ef00eab09 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1168,7 +1168,7 @@ int devind;
 /*===========================================================================*
  *				record_bars				     *
  *===========================================================================*/
-PRIVATE void record_bars(devind, last_reg)
+PRIVATE void record_bars(int devind, int last_reg)
 {
 	int i, reg, width;
 
@@ -2397,7 +2397,7 @@ int port;
 		port);
 #if USER_SPACE
 	if (OK != (s=sys_outl(PCII_CONFADD, PCII_UNSEL)))
-		printf("PCI: warning, sys_outl failed: %d\n");
+		printf("PCI: warning, sys_outl failed: %d\n", s);
 #else
 	outl(PCII_CONFADD, PCII_UNSEL);
 #endif
@@ -2514,7 +2514,7 @@ u32_t value;
 		port, value);
 #if USER_SPACE
 	if (OK != (s=sys_outl(PCII_CONFADD, PCII_UNSEL)))
-		printf("PCI: warning, sys_outl failed: %d\n");
+		printf("PCI: warning, sys_outl failed: %d\n",s);
 #else
 	outl(PCII_CONFADD, PCII_UNSEL);
 #endif
@@ -2523,8 +2523,7 @@ u32_t value;
 /*===========================================================================*
  *				pcii_rsts				     *
  *===========================================================================*/
-PRIVATE u16_t pcii_rsts(busind)
-int busind;
+PRIVATE u16_t pcii_rsts(int busind)
 {
 	u16_t v;
 	int s;
diff --git a/drivers/rtl8169/rtl8169.c b/drivers/rtl8169/rtl8169.c
index dfee1dddb..0c537841e 100644
--- a/drivers/rtl8169/rtl8169.c
+++ b/drivers/rtl8169/rtl8169.c
@@ -263,7 +263,7 @@ _PROTOTYPE( static void check_int_events, (void)			);
 _PROTOTYPE( static void do_hard_int, (void)				);
 _PROTOTYPE( static void rtl8169_dump, (void)				);
 _PROTOTYPE( static void dump_phy, (re_t *rep)				);
-_PROTOTYPE( static int rl_handler, (re_t *rep)				);
+_PROTOTYPE( static void rl_handler, (re_t *rep)				);
 _PROTOTYPE( static void rl_watchdog_f, (timer_t *tp)			);
 
 /*
@@ -1989,8 +1989,7 @@ static void do_hard_int(void)
 /*===========================================================================*
  *				rl_handler				     *
  *===========================================================================*/
-static int rl_handler(rep)
-re_t *rep;
+static void rl_handler(re_t *rep)
 {
 	int i, port, tx_head, tx_tail, link_up;
 	u16_t isr;
@@ -2093,8 +2092,6 @@ re_t *rep;
 
 	if (isr)
 		printf("rl_handler: unhandled interrupt isr = 0x%04x\n", isr);
-
-	return 1;
 }
 
 /*===========================================================================*
diff --git a/drivers/sb16/mixer/sb16_mixer.c b/drivers/sb16/mixer/sb16_mixer.c
index e64d1bf36..cff70fdce 100644
--- a/drivers/sb16/mixer/sb16_mixer.c
+++ b/drivers/sb16/mixer/sb16_mixer.c
@@ -328,10 +328,10 @@ PRIVATE int get_set_input(const message *m_ptr, int flag, int channel)
 		mixer_set(input_cmd, mask);
 	} else {	/* Get input */
 		if (shift > 0) {
-			input.left = (((mask >> (shift+1)) & 1) == 1 ? ON : OFF);
-			input.right = (((mask >> shift) & 1) == 1 ? ON : OFF);
+			input.left = ((((mask >> (shift+1)) & 1) == 1) ? ON : OFF);
+			input.right = ((((mask >> shift) & 1) == 1) ? ON : OFF);
 		} else {
-			input.left = ((mask & 1) == 1 ? ON : OFF);
+			input.left = (((mask & 1) == 1) ? ON : OFF);
 		}
 
 		/* Copy back to user */
@@ -384,10 +384,10 @@ PRIVATE int get_set_output(const message *m_ptr, int flag)
 		mixer_set(MIXER_OUTPUT_CTRL, mask);
 	} else {    /* Get input */
 		if (shift > 0) {
-			output.left = (((mask >> (shift+1)) & 1) == 1 ? ON : OFF);
-			output.right = (((mask >> shift) & 1) == 1 ? ON : OFF);
+			output.left = ((((mask >> (shift+1)) & 1) == 1) ? ON : OFF);
+			output.right = ((((mask >> shift) & 1) == 1) ? ON : OFF);
 		} else {
-			output.left = ((mask & 1) == 1 ? ON : OFF);
+			output.left = (((mask & 1) == 1) ? ON : OFF);
 		}
 
 		/* Copy back to user */
diff --git a/drivers/ti1225/ti1225.c b/drivers/ti1225/ti1225.c
index 61c2a06e9..5783497c8 100644
--- a/drivers/ti1225/ti1225.c
+++ b/drivers/ti1225/ti1225.c
@@ -440,7 +440,7 @@ struct port *pp;
 	v8= pci_attr_r8(devind, TI_CARD_CTRL);
 	if (v8 & TI_CCR_IFG)
 	{
-		printf("ti1225: got functional interrupt\n", v8);
+		printf("ti1225: got functional interrupt\n");
 		pci_attr_w8(devind, TI_CARD_CTRL, v8);
 	}
 
diff --git a/kernel/arch/i386/breakpoints.c b/kernel/arch/i386/breakpoints.c
index 176ae609a..6cffe8ed6 100644
--- a/kernel/arch/i386/breakpoints.c
+++ b/kernel/arch/i386/breakpoints.c
@@ -49,7 +49,7 @@ printf("ld_dr7(0x%x)\n",dr7);
 		case 3: ld_dr3(linaddr); break;
 		default: panic(__FILE__, "invalid breakpoint index", __LINE__);
 	}
-printf("ld_dr%d(0x%x, 0x%x)\n",bp,linaddr);
+printf("ld_dr%d(0x%x)\n",bp,linaddr);
 	
 	/* set new flags */
 	dr7 |= dr7flags;
diff --git a/kernel/system/do_clear.c b/kernel/system/do_clear.c
index 31682b36d..0e85a764d 100644
--- a/kernel/system/do_clear.c
+++ b/kernel/system/do_clear.c
@@ -32,7 +32,7 @@ PUBLIC int do_clear(struct proc * caller, message * m_ptr)
   rc = proc_addr(exit_p);	/* clean up */
 
   /* Don't clear if already cleared. */
-  if(isemptyp(rc)) return;
+  if(isemptyp(rc)) return OK;
 
   /* Check the table with IRQ hooks to see if hooks should be released. */
   for (i=0; i < NR_IRQ_HOOKS; i++) {
diff --git a/kernel/system/do_update.c b/kernel/system/do_update.c
index ef43407cd..f38f7205d 100644
--- a/kernel/system/do_update.c
+++ b/kernel/system/do_update.c
@@ -35,14 +35,12 @@ PUBLIC int do_update(struct proc * caller, message * m_ptr)
  */
   endpoint_t src_e, dst_e;
   int src_p, dst_p;
-  struct proc *src_rp, *dst_rp, *rp;
+  struct proc *src_rp, *dst_rp;
   struct priv *src_privp, *dst_privp;
   struct proc orig_src_proc;
   struct proc orig_dst_proc;
   struct priv orig_src_priv;
   struct priv orig_dst_priv;
-  int r;
-  reg_t src_vbp, dst_vbp;
 
   /* Lookup slots for source and destination process. */
   src_e = m_ptr->SYS_UPD_SRC_ENDPT;
diff --git a/kernel/system/do_vmctl.c b/kernel/system/do_vmctl.c
index 136b20b55..5d091d402 100644
--- a/kernel/system/do_vmctl.c
+++ b/kernel/system/do_vmctl.c
@@ -21,7 +21,6 @@ PUBLIC int do_vmctl(struct proc * caller, message * m_ptr)
   int proc_nr;
   endpoint_t ep = m_ptr->SVMCTL_WHO;
   struct proc *p, *rp, *target;
-  int err;
 
   if(ep == SELF) { ep = m_ptr->m_source; }
 
diff --git a/lib/libc/ansi/misc.c b/lib/libc/ansi/misc.c
index 42333e055..2ea0b88a6 100644
--- a/lib/libc/ansi/misc.c
+++ b/lib/libc/ansi/misc.c
@@ -206,7 +206,7 @@ date_of(const register struct dsttype *dst, const struct tm *timep)
 
 	if (dst->ds_type != 'M') {
 		return dst->ds_date[0] -
-			    (dst->ds_type == 'J'
+			    ((dst->ds_type == 'J')
 				&& leap
 				&& dst->ds_date[0] < 58);
 	}
diff --git a/lib/libdriver/driver.c b/lib/libdriver/driver.c
index 5b9a88e4f..7a8a5c693 100644
--- a/lib/libdriver/driver.c
+++ b/lib/libdriver/driver.c
@@ -385,7 +385,7 @@ message *mp;
 /*===========================================================================*
  *				nop_prepare				     *
  *===========================================================================*/
-PUBLIC struct device *nop_prepare(device)
+PUBLIC struct device *nop_prepare(int device)
 {
 /* Nothing to prepare for. */
   return(NIL_DEV);
diff --git a/servers/hgfs/hgfs_server/main.c b/servers/hgfs/hgfs_server/main.c
index 78c212d6b..794a60874 100644
--- a/servers/hgfs/hgfs_server/main.c
+++ b/servers/hgfs/hgfs_server/main.c
@@ -92,9 +92,6 @@ sef_init_info_t *info;
  *===========================================================================*/
 PRIVATE void sef_cb_signal_handler(int signo)
 {
-  sigset_t set;
-  int r;
-
   /* Only check for termination signal, ignore anything else. */
   if (signo != SIGTERM) return;
 
diff --git a/servers/is/dmp_kernel.c b/servers/is/dmp_kernel.c
index 642747b05..3a370cdf8 100644
--- a/servers/is/dmp_kernel.c
+++ b/servers/is/dmp_kernel.c
@@ -61,8 +61,7 @@ PUBLIC struct boot_image image[NR_BOOT_PROCS];
 PUBLIC void timing_dmp()
 {
   static struct util_timingdata timingdata[TIMING_CATEGORIES];
-  int r, c, f, skipped = 0, printed = 0, maxlines = 23, x = 0;
-  static int offsetlines = 0;
+  int r, c, x = 0;
 
   if ((r = sys_getlocktimings(&timingdata[0])) != OK) {
       printf("IS: warning: couldn't get copy of lock timings: %d\n", r);
@@ -213,7 +212,7 @@ PRIVATE char *boot_flags_str(int flags)
  *===========================================================================*/
 PUBLIC void image_dmp()
 {
-  int m, i,j,r;
+  int m, r;
   struct boot_image *ip;
 	
   if ((r = sys_getimage(image)) != OK) {
@@ -315,7 +314,7 @@ PUBLIC void privileges_dmp()
   register struct proc *rp;
   static struct proc *oldrp = BEG_PROC_ADDR;
   register struct priv *sp;
-  int r, i, n = 0;
+  int r, i;
 
   /* First obtain a fresh copy of the current process and system table. */
   if ((r = sys_getprivtab(priv)) != OK) {
@@ -381,7 +380,7 @@ PUBLIC void proctab_dmp()
 
   register struct proc *rp;
   static struct proc *oldrp = BEG_PROC_ADDR;
-  int r, n = 0;
+  int r;
   phys_clicks text, data, size;
 
   /* First obtain a fresh copy of the current process table. */
@@ -418,7 +417,7 @@ PUBLIC void procstack_dmp()
 
   register struct proc *rp;
   static struct proc *oldrp = BEG_PROC_ADDR;
-  int r, n = 0;
+  int r;
 
   /* First obtain a fresh copy of the current process table. */
   if ((r = sys_getproctab(proc)) != OK) {
@@ -441,7 +440,7 @@ PUBLIC void memmap_dmp()
 {
   register struct proc *rp;
   static struct proc *oldrp = proc;
-  int r, n = 0;
+  int r;
   phys_clicks size;
 
   /* First obtain a fresh copy of the current process table. */
diff --git a/servers/is/main.c b/servers/is/main.c
index cc8e0c374..ce38d0116 100644
--- a/servers/is/main.c
+++ b/servers/is/main.c
@@ -37,7 +37,6 @@ PUBLIC int main(int argc, char **argv)
  * sending the reply. The loop never terminates, unless a panic occurs.
  */
   int result;                 
-  sigset_t sigset;
 
   /* SEF local startup. */
   env_setargs(argc, argv);
@@ -97,7 +96,7 @@ PRIVATE void sef_local_startup()
 /*===========================================================================*
  *		            sef_cb_init_fresh                                *
  *===========================================================================*/
-PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
+PRIVATE int sef_cb_init_fresh(int UNUSED(type), sef_init_info_t *UNUSED(info))
 {
 /* Initialize the information server. */
 
diff --git a/servers/iso9660fs/cache.c b/servers/iso9660fs/cache.c
index 990aa190d..b9cca4933 100644
--- a/servers/iso9660fs/cache.c
+++ b/servers/iso9660fs/cache.c
@@ -28,7 +28,6 @@ PUBLIC struct buf *bp_to_pickup = buf; /* This is a pointer to the next node in
 PUBLIC struct buf *get_block(block)
 register block_t block;		/* which block is wanted? */
 {
-  int b;
   register struct buf *bp, *free_bp;
 
   free_bp = NIL_BUF;
diff --git a/servers/iso9660fs/device.c b/servers/iso9660fs/device.c
index 9afc6c459..647560103 100644
--- a/servers/iso9660fs/device.c
+++ b/servers/iso9660fs/device.c
@@ -41,7 +41,6 @@ void **buf;
 int *vec_grants;
 vir_bytes bytes;
 {
-	int size;
 	int j;
 	iovec_t *v;
 	static iovec_t new_iovec[NR_IOREQS];
@@ -170,10 +169,8 @@ int bytes;			/* how many bytes to transfer */
 int flags;			/* special flags, like O_NONBLOCK */
 {
 /* Read or write from a device.  The parameter 'dev' tells which one. */
-  struct dmap *dp;
   int r, safe;
   message m;
-  iovec_t *v;
   cp_grant_id_t gid = GRANT_INVALID;
   int vec_grants;
   int op_used;
diff --git a/servers/iso9660fs/main.c b/servers/iso9660fs/main.c
index a3fb0cd25..c1c18270d 100644
--- a/servers/iso9660fs/main.c
+++ b/servers/iso9660fs/main.c
@@ -20,7 +20,6 @@ FORWARD _PROTOTYPE( int sef_cb_init_fresh, (int type, sef_init_info_t *info) );
  *===========================================================================*/
 PUBLIC int main(void) {
   endpoint_t who_e, ind, error;
-  message m;
 
   /* SEF local startup. */
   sef_local_startup();
diff --git a/servers/iso9660fs/path.c b/servers/iso9660fs/path.c
index a19e36786..202fedbef 100644
--- a/servers/iso9660fs/path.c
+++ b/servers/iso9660fs/path.c
@@ -16,7 +16,7 @@ FORWARD _PROTOTYPE( int parse_path, (ino_t dir_ino, ino_t root_ino, int flags,
  *===========================================================================*/
 PUBLIC int fs_lookup() {
   cp_grant_id_t grant;
-  int r, r1, len, flags;
+  int r, len, flags;
   size_t offset;
   ino_t dir_ino, root_ino;
   struct dir_record *dir;
@@ -87,8 +87,8 @@ PUBLIC int search_dir(ldir_ptr,string,numb)
      ino_t *numb;		      /* pointer to new dir record */
 {
   struct dir_record *dir_tmp;
-  register struct buf *bp,*bp2;
-  int pos,len;
+  register struct buf *bp;
+  int pos;
   char* comma_pos = NULL;
   char tmp_string[NAME_MAX];
 
@@ -293,8 +293,7 @@ struct dir_record **resp;		/* resulting inode */
  */
 
   register struct dir_record *rip = NULL;
-  int r, inumb;
-  dev_t mnt_dev;
+  int r;
   ino_t numb;
 
   /* If 'string' is empty, yield same inode straight away. */
diff --git a/servers/iso9660fs/read.c b/servers/iso9660fs/read.c
index 789eade94..960ba0217 100644
--- a/servers/iso9660fs/read.c
+++ b/servers/iso9660fs/read.c
@@ -80,8 +80,7 @@ PUBLIC int fs_bread(void)
   int nrbytes;
   u64_t position;
   unsigned int off, cum_io;
-  mode_t mode_word;
-  int completed, r2 = OK;
+  int completed;
   struct dir_record *dir;
   
   r = OK;
@@ -292,9 +291,7 @@ int *completed;			/* number of bytes copied */
 
   register struct buf *bp;
   register int r = OK;
-  int n;
   block_t b;
-  dev_t dev;
   int file_unit, rel_block, offset;
 
   *completed = 0;
diff --git a/servers/iso9660fs/stadir.c b/servers/iso9660fs/stadir.c
index c3ded5a98..d29d18fb3 100644
--- a/servers/iso9660fs/stadir.c
+++ b/servers/iso9660fs/stadir.c
@@ -25,8 +25,7 @@ PRIVATE int stat_dir_record(
 
 /* Common code for stat and fstat system calls. */
   struct stat statbuf;
-  mode_t mo;
-  int r, s;
+  int r;
   struct tm ltime;
   time_t time1;
 
diff --git a/servers/mfs/device.c b/servers/mfs/device.c
index faf2b700d..f81aea977 100644
--- a/servers/mfs/device.c
+++ b/servers/mfs/device.c
@@ -54,7 +54,6 @@ void **buf;
 int *vec_grants;
 vir_bytes bytes;
 {
-  int access = 0, size;
   int j;
   iovec_t *v;
   static iovec_t *new_iovec;
@@ -158,10 +157,8 @@ int bytes;			/* how many bytes to transfer */
 int flags;			/* special flags, like O_NONBLOCK */
 {
 /* Read or write from a device.  The parameter 'dev' tells which one. */
-  struct dmap *dp;
   int r, safe;
   message m;
-  iovec_t *v;
   cp_grant_id_t gid = GRANT_INVALID;
   int vec_grants;
   int op_used;
diff --git a/servers/mfs/inode.c b/servers/mfs/inode.c
index 7c314e4e0..27a65b9eb 100644
--- a/servers/mfs/inode.c
+++ b/servers/mfs/inode.c
@@ -128,7 +128,7 @@ int numb;			/* inode number (ANSI: may not be unshort) */
 /* Find the inode in the hash table. If it is not there, get a free inode
  * load it from the disk if it's necessary and put on the hash list 
  */
-  register struct inode *rip, *xp;
+  register struct inode *rip;
   int hashi;
 
   hashi = numb & INODE_HASH_MASK;
diff --git a/servers/mfs/main.c b/servers/mfs/main.c
index d24758b9b..5acc79658 100644
--- a/servers/mfs/main.c
+++ b/servers/mfs/main.c
@@ -28,7 +28,6 @@ PUBLIC int main(int argc, char *argv[])
  * sending the reply. The loop never terminates, unless a panic occurs.
  */
   int error, ind;
-  message m;
 
   /* SEF local startup. */
   env_setargs(argc, argv);
diff --git a/servers/mfs/mount.c b/servers/mfs/mount.c
index 24a4ab6f8..12d893309 100644
--- a/servers/mfs/mount.c
+++ b/servers/mfs/mount.c
@@ -23,7 +23,6 @@ PUBLIC int fs_readsuper()
  * so that the VFS knows that it has to find the vnode on which this FS 
  * process' partition is mounted on.
  */
-  struct super_block *xp;
   struct inode *root_ip;
   cp_grant_id_t label_gid;
   size_t label_len;
@@ -152,7 +151,6 @@ PUBLIC int fs_mountpoint()
 PUBLIC int fs_unmount()
 {
 /* Unmount a file system by device number. */
-  struct super_block *sp1;
   int count;
   struct inode *rip, *root_ip;
 
diff --git a/servers/mfs/open.c b/servers/mfs/open.c
index c07e34318..44abd8930 100644
--- a/servers/mfs/open.c
+++ b/servers/mfs/open.c
@@ -21,7 +21,7 @@ FORWARD _PROTOTYPE( struct inode *new_node, (struct inode *ldirp,
 PUBLIC int fs_create()
 {
   phys_bytes len;
-  int r, b;
+  int r;
   struct inode *ldirp;
   struct inode *rip;
   mode_t omode;
diff --git a/servers/mfs/path.c b/servers/mfs/path.c
index d5268b281..531d24927 100644
--- a/servers/mfs/path.c
+++ b/servers/mfs/path.c
@@ -67,7 +67,6 @@ PUBLIC int fs_lookup()
   if(user_path[len - 1] != '\0') return(EINVAL);
 
   if(flags & PATH_GET_UCRED) { /* Do we have to copy uid/gid credentials? */
-  	int i;
   	grant2	= fs_m_in.REQ_GRANT2;
   	cred_size = fs_m_in.REQ_UCRED_SIZE;
 
diff --git a/servers/mfs/protect.c b/servers/mfs/protect.c
index 4a451d986..6d4d5c4ef 100644
--- a/servers/mfs/protect.c
+++ b/servers/mfs/protect.c
@@ -17,7 +17,6 @@ PUBLIC int fs_chmod()
 /* Perform the chmod(name, mode) system call. */
 
   register struct inode *rip;
-  register int r;
   
   /* Temporarily open the file. */
   if( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE)
@@ -78,7 +77,6 @@ PUBLIC int forbidden(register struct inode *rip, mode_t access_desired)
  */
 
   register struct inode *old_rip = rip;
-  register struct super_block *sp;
   register mode_t bits, perm_bits;
   int r, shift;
 
diff --git a/servers/mfs/read.c b/servers/mfs/read.c
index e7f794287..cfcce9006 100644
--- a/servers/mfs/read.c
+++ b/servers/mfs/read.c
@@ -22,7 +22,7 @@ PRIVATE char getdents_buf[GETDENTS_BUFSIZ];
 PUBLIC int fs_readwrite(void)
 {
   int r, rw_flag, chunk, block_size, block_spec;
-  int partial_cnt, regular, nrbytes;
+  int regular, nrbytes;
   cp_grant_id_t gid;
   off_t position, f_size, bytes_left;
   unsigned int off, cum_io;
@@ -140,8 +140,7 @@ PUBLIC int fs_breadwrite(void)
   int nrbytes;
   u64_t position;
   unsigned int off, cum_io;
-  mode_t mode_word;
-  int completed, r2 = OK;
+  int completed;
 
   /* Pseudo inode for rw_chunk */
   struct inode rip;
diff --git a/servers/mfs/write.c b/servers/mfs/write.c
index a19e5b91b..7a66f52f7 100644
--- a/servers/mfs/write.c
+++ b/servers/mfs/write.c
@@ -291,7 +291,6 @@ off_t position;			/* file pointer */
   zone_t z;
   zone_t zone_size;
   int scale, r;
-  struct super_block *sp;
 
   /* Is another block available in the current zone? */
   if ( (b = read_map(rip, position)) == NO_BLOCK) {
diff --git a/servers/pfs/inode.c b/servers/pfs/inode.c
index 0544e8611..90626f026 100644
--- a/servers/pfs/inode.c
+++ b/servers/pfs/inode.c
@@ -127,7 +127,7 @@ int numb;			/* inode number (ANSI: may not be unshort) */
 /* Find the inode in the hash table. If it is not there, get a free inode
  * load it from the disk if it's necessary and put on the hash list 
  */
-  register struct inode *rip, *xp;
+  register struct inode *rip;
   int hashi;
 
   hashi = numb & INODE_HASH_MASK;
@@ -245,7 +245,6 @@ PUBLIC struct inode *alloc_inode(dev_t dev, mode_t bits)
 /* Allocate a free inode on 'dev', and return a pointer to it. */
 
   register struct inode *rip;
-  int major, minor;
   bit_t b;
   ino_t i_num;
 
@@ -293,8 +292,6 @@ register struct inode *rip;	/* the inode to be erased */
  * inode is to be truncated.
  */
 
-  register int i;
-
   rip->i_size = 0;
   rip->i_update = ATIME | CTIME | MTIME;	/* update all times later */
 }
diff --git a/servers/pfs/link.c b/servers/pfs/link.c
index 12c8285ee..71208f560 100644
--- a/servers/pfs/link.c
+++ b/servers/pfs/link.c
@@ -1,8 +1,5 @@
 #include "fs.h"
-#include <sys/stat.h>
 #include <string.h>
-#include <minix/com.h>
-#include <minix/callnr.h>
 #include "buf.h"
 #include "inode.h"
 #include <minix/vfsif.h>
@@ -14,7 +11,6 @@ PUBLIC int fs_ftrunc(void)
 {
   struct inode *rip;
   off_t start, end;
-  int r;
   ino_t inumb;
   
   inumb = fs_m_in.REQ_INODE_NR;
@@ -43,7 +39,6 @@ off_t newsize;			/* inode must become this size */
  * O_APPEND mode, as this is different per fd and is checked when 
  * writing is done.
  */
-  int scale;
 
   /* Pipes can shrink, so adjust size to make sure all zones are removed. */
   if(newsize != 0) return(EINVAL);	/* Only truncate pipes to 0. */
diff --git a/servers/pfs/main.c b/servers/pfs/main.c
index 16b1ffdd8..efcb48503 100644
--- a/servers/pfs/main.c
+++ b/servers/pfs/main.c
@@ -25,7 +25,6 @@ PUBLIC int main(int argc, char *argv[])
  * sending the reply. The loop never terminates, unless a panic occurs.
  */
   int error, ind;
-  message m;
 
   /* SEF local startup. */
   env_setargs(argc, argv);
diff --git a/servers/pfs/read.c b/servers/pfs/read.c
index 215b35f71..bd763abe4 100644
--- a/servers/pfs/read.c
+++ b/servers/pfs/read.c
@@ -12,7 +12,6 @@
 PUBLIC int fs_readwrite(void)
 {
   int r, rw_flag;
-  block_t b;
   struct buf *bp;
   cp_grant_id_t gid;
   off_t position, f_size;
diff --git a/servers/pm/exec.c b/servers/pm/exec.c
index 77198ce6b..350d0e6f7 100644
--- a/servers/pm/exec.c
+++ b/servers/pm/exec.c
@@ -40,7 +40,6 @@
 PUBLIC int do_exec()
 {
 	message m;
-	int r;
 
 	/* Forward call to FS */
 	m.m_type = PM_EXEC;
diff --git a/servers/pm/forkexit.c b/servers/pm/forkexit.c
index dc29656da..3406296c2 100644
--- a/servers/pm/forkexit.c
+++ b/servers/pm/forkexit.c
@@ -47,7 +47,7 @@ PUBLIC int do_fork()
   register struct mproc *rmc;	/* pointer to child */
   pid_t new_pid;
   static int next_child;
-  int i, n = 0, r, s;
+  int i, n = 0, s;
   endpoint_t child_ep;
   message m;
 
@@ -133,7 +133,7 @@ PUBLIC int do_srv_fork()
   int s;
   pid_t new_pid;
   static int next_child;
-  int i, n = 0, r;
+  int i, n = 0;
   endpoint_t child_ep;
   message m;
 
@@ -243,7 +243,7 @@ int dump_core;			/* flag indicating whether to dump core */
  * become a zombie.
  */
   register int proc_nr, proc_nr_e;
-  int parent_waiting, r;
+  int r;
   pid_t procgrp;
   struct mproc *p_mp;
   clock_t user_time, sys_time;
diff --git a/servers/pm/getset.c b/servers/pm/getset.c
index a2da959d7..498e73619 100644
--- a/servers/pm/getset.c
+++ b/servers/pm/getset.c
@@ -22,7 +22,7 @@ PUBLIC int do_get()
  */
 
   register struct mproc *rmp = mp;
-  int r, proc;
+  int r;
   int ngroups;
 
   switch(call_nr) {
diff --git a/servers/pm/misc.c b/servers/pm/misc.c
index 7a5d60ab7..06bf30535 100644
--- a/servers/pm/misc.c
+++ b/servers/pm/misc.c
@@ -366,7 +366,6 @@ PUBLIC int do_getepinfo()
 PUBLIC int do_reboot()
 {
   message m;
-  int r;
 
   /* Check permission to abort the system. */
   if (mp->mp_effuid != SUPER_USER) return(EPERM);
diff --git a/servers/pm/signal.c b/servers/pm/signal.c
index 84b0cafe5..53d30d1f5 100644
--- a/servers/pm/signal.c
+++ b/servers/pm/signal.c
@@ -213,9 +213,7 @@ PUBLIC int do_srv_kill()
 /*===========================================================================*
  *				process_ksig				     *
  *===========================================================================*/
-PUBLIC int process_ksig(proc_nr_e, signo)
-int proc_nr_e;
-int signo;
+PUBLIC int process_ksig(int proc_nr_e, int signo)
 {
   register struct mproc *rmp;
   int proc_nr;
@@ -223,14 +221,14 @@ int signo;
 
   if(pm_isokendpt(proc_nr_e, &proc_nr) != OK || proc_nr < 0) {
 	printf("PM: process_ksig: %d?? not ok\n", proc_nr_e);
-	return;
+	return EDEADSRCDST; /* process is gone. */
   }
   rmp = &mproc[proc_nr];
   if ((rmp->mp_flags & (IN_USE | EXITING)) != IN_USE) {
 #if 0
 	printf("PM: process_ksig: %d?? exiting / not in use\n", proc_nr_e);
 #endif
-	return;
+	return EDEADSRCDST; /* process is gone. */
   }
   proc_id = rmp->mp_pid;
   mp = &mproc[0];			/* pretend signals are from PM */
@@ -615,7 +613,7 @@ struct mproc *rmp;		/* which process */
  * so it can check for READs and WRITEs from pipes, ttys and the like.
  */
   message m;
-  int r, slot;
+  int r;
 
   /* If we're already waiting for a delayed call, don't do anything now. */
   if (rmp->mp_flags & DELAY_CALL)
diff --git a/servers/rs/exec.c b/servers/rs/exec.c
index 741cf50be..cda1ae715 100644
--- a/servers/rs/exec.c
+++ b/servers/rs/exec.c
@@ -34,7 +34,6 @@ int srv_execve(int proc_e, char *exec, size_t exec_len, char **argv,
 	size_t string_off;
 	size_t n;
 	int ov;
-	message m;
 	int r;
 
 	/* Assumptions: size_t and char *, it's all the same thing. */
@@ -161,7 +160,7 @@ static int do_exec(int proc_e, char *exec, size_t exec_len, char *progname,
 		proc_e, (vir_bytes) vsp, (phys_bytes)frame_len);
 	if (r != OK) {
 		printf("RS: stack_top is 0x%lx; tried to copy to 0x%lx in %d\n",
-			stack_top, vsp);
+			stack_top, vsp, proc_e);
 		printf("do_exec: copying out new stack failed: %d\n", r);
 		error= r;
 		goto fail;
@@ -298,7 +297,6 @@ vir_bytes *pc;			/* program entry point (initial PC) */
 int *hdrlenp;
 {
 /* Read the header and extract the text, data, bss and total sizes from it. */
-  block_t b;
   struct exec hdr;		/* a.out header is read in here */
 
   /* Read the header and check the magic number.  The standard MINIX header 
@@ -327,8 +325,6 @@ int *hdrlenp;
    * used here only. The symbol table is for the benefit of a debugger and 
    * is ignored here.
    */
-  int r;
-
   if (exec_len < sizeof(hdr)) return(ENOEXEC);
 
   memcpy(&hdr, exec, sizeof(hdr));
@@ -413,7 +409,6 @@ phys_bytes seg_bytes;		/* how much is to be transferred? */
  */
 
   int r;
-  off_t n, o, b_off, seg_off;
 
   if (off+seg_bytes > exec_len) return ENOEXEC;
   r= sys_vircopy(SELF, D, (vir_bytes)exec+off, proc_e, seg, 0, seg_bytes);
diff --git a/servers/rs/main.c b/servers/rs/main.c
index e7fdea351..3630b338d 100644
--- a/servers/rs/main.c
+++ b/servers/rs/main.c
@@ -479,8 +479,6 @@ PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
  *===========================================================================*/
 PRIVATE void sef_cb_signal_handler(int signo)
 {
-  int exit_status;
-
   /* Check for known signals, ignore anything else. */
   switch(signo) {
       case SIGCHLD:
@@ -508,13 +506,15 @@ PRIVATE int sef_cb_signal_manager(endpoint_t target, int signo)
       if(rs_verbose)
           printf("RS: ignoring spurious signal %d for process %d\n",
               signo, target);
-      return;
+      return OK;	/* Since we're ignoring it, we have handled
+			 * the signal without problem. All is OK.
+			 */
   }
   rp = rproc_ptr[target_p];
   rpub = rp->r_pub;
 
   /* Don't bother if a termination signal has already been processed. */
-  if( rp->r_flags & (RS_TERMINATED|RS_EXITING) == RS_TERMINATED ) {
+  if(rp->r_flags & RS_TERMINATED) {
       return EDEADSRCDST; /* process is gone */
   }
 
diff --git a/servers/rs/manager.c b/servers/rs/manager.c
index 39dc03fcd..157097a1f 100644
--- a/servers/rs/manager.c
+++ b/servers/rs/manager.c
@@ -268,7 +268,6 @@ PUBLIC void end_update(int result)
  *    service has a period, a status request will be forced in the next period.
  */
   struct rproc *old_rp, *new_rp, *exiting_rp, *surviving_rp;
-  message m;
 
   old_rp = rupdate.rp;
   new_rp = old_rp->r_new_rp;
@@ -316,8 +315,6 @@ char *errstr;
 int err;
 {
 /* Crash a system service and don't let it restart. */
-  struct rprocpub *rpub;
-
   if(errstr && !shutting_down) {
       printf("RS: %s (error %d)\n", errstr, err);
   }
@@ -383,12 +380,8 @@ struct rproc *rp;
 /* Create the given system service. */
   int child_proc_nr_e, child_proc_nr_n;		/* child process slot */
   pid_t child_pid;				/* child's process id */
-  char *file_only;
-  int s, use_copy, slot_nr;
-  bitchunk_t *vm_mask;
-  message m;
+  int s, use_copy;
   extern char **environ;
-  char * null_env = NULL;
   struct rprocpub *rpub;
 
   rpub = rp->r_pub;
@@ -879,11 +872,63 @@ PUBLIC void terminate_service(struct rproc *rp)
   }
 }
 
+/*===========================================================================*
+ *				run_script				     *
+ *===========================================================================*/
+PRIVATE int run_script(struct rproc *rp)
+{
+	int r, endpoint;
+	pid_t pid;
+	char *reason;
+	char incarnation_str[20];	/* Enough for a counter? */
+	char *envp[1] = { NULL };
+	struct rprocpub *rpub;
+
+	rpub = rp->r_pub;
+	if (rp->r_flags & RS_REFRESHING)
+		reason= "restart";
+	else if (rp->r_flags & RS_NOPINGREPLY)
+		reason= "no-heartbeat";
+	else reason= "crashed";
+	sprintf(incarnation_str, "%d", rp->r_restarts);
+
+ 	if(rs_verbose) {
+		printf("RS: %s:\n", srv_to_string(rp));
+		printf("RS:     calling script '%s'\n", rp->r_script);
+		printf("RS:     reason: '%s'\n", reason);
+		printf("RS:     incarnation: '%s'\n", incarnation_str);
+	}
+
+	pid= fork();
+	switch(pid)
+	{
+	case -1:
+		return kill_service(rp, "unable to fork script", errno);
+	case 0:
+		execle(rp->r_script, rp->r_script, rpub->label, reason,
+			incarnation_str, NULL, envp);
+		printf("RS: run_script: execl '%s' failed: %s\n",
+			rp->r_script, strerror(errno));
+		exit(1);
+	default:
+		/* Set the privilege structure for the child process. */
+		endpoint = getnprocnr(pid);
+		if ((r = sys_privctl(endpoint, SYS_PRIV_SET_USER, NULL))
+			!= OK) {
+			return kill_service(rp,"can't set script privileges",r);
+		}
+		/* Allow the script to run. */
+		if ((r = sys_privctl(endpoint, SYS_PRIV_ALLOW, NULL)) != OK) {
+			return kill_service(rp,"can't let the script run",r);
+		}
+	}
+	return OK;
+}
+
 /*===========================================================================*
  *			      restart_service				     *
  *===========================================================================*/
-PUBLIC void restart_service(rp)
-struct rproc *rp;
+PUBLIC void restart_service(struct rproc *rp)
 {
 /* Restart service via a recovery script or directly. */
   struct rproc *replica_rp;
@@ -1092,13 +1137,7 @@ endpoint_t source;
 {
 /* Initialize a slot as requested by the client. */
   struct rprocpub *rpub;
-  int slot_nr;					/* local table entry */
-  int arg_count;				/* number of arguments */
-  char *cmd_ptr;				/* parse command string */
   char *label;					/* unique name of command */
-  enum dev_style dev_style;			/* device style */
-  struct rproc *tmp_rp;
-  struct rprocpub *tmp_rpub;
   int len;					/* length of string */
   int i;
   int s;
@@ -1534,59 +1573,6 @@ struct rproc *rp;
   rproc_ptr[_ENDPOINT_P(rpub->endpoint)] = NULL;
 }
 
-/*===========================================================================*
- *				run_script				     *
- *===========================================================================*/
-PUBLIC int run_script(rp)
-struct rproc *rp;
-{
-	int r, endpoint;
-	pid_t pid;
-	char *reason;
-	char incarnation_str[20];	/* Enough for a counter? */
-	char *envp[1] = { NULL };
-	struct rprocpub *rpub;
-
-	rpub = rp->r_pub;
-	if (rp->r_flags & RS_REFRESHING)
-		reason= "restart";
-	else if (rp->r_flags & RS_NOPINGREPLY)
-		reason= "no-heartbeat";
-	else reason= "crashed";
-	sprintf(incarnation_str, "%d", rp->r_restarts);
-
- 	if(rs_verbose) {
-		printf("RS: %s:\n", srv_to_string(rp));
-		printf("RS:     calling script '%s'\n", rp->r_script);
-		printf("RS:     reason: '%s'\n", reason);
-		printf("RS:     incarnation: '%s'\n", incarnation_str);
-	}
-
-	pid= fork();
-	switch(pid)
-	{
-	case -1:
-		return kill_service(rp, "unable to fork script", errno);
-	case 0:
-		execle(rp->r_script, rp->r_script, rpub->label, reason,
-			incarnation_str, NULL, envp);
-		printf("RS: run_script: execl '%s' failed: %s\n",
-			rp->r_script, strerror(errno));
-		exit(1);
-	default:
-		/* Set the privilege structure for the child process. */
-		endpoint = getnprocnr(pid);
-		if ((r = sys_privctl(endpoint, SYS_PRIV_SET_USER, NULL))
-			!= OK) {
-			return kill_service(rp,"can't set script privileges",r);
-		}
-		/* Allow the script to run. */
-		if ((r = sys_privctl(endpoint, SYS_PRIV_ALLOW, NULL)) != OK) {
-			return kill_service(rp,"can't let the script run",r);
-		}
-	}
-}
-
 
 /*===========================================================================*
  *				get_next_label				     *
@@ -1617,7 +1603,7 @@ char *caller_label;
 		if (len > RS_MAX_LABEL_LEN)
 		{
 			printf(
-	"rs:get_next_label: bad ipc list entry '.*s' for %s: too long\n",
+	"rs:get_next_label: bad ipc list entry '%.*s' for %s: too long\n",
 				len, p, caller_label);
 			continue;
 		}
diff --git a/servers/rs/proto.h b/servers/rs/proto.h
index d73314e8b..c574e030d 100644
--- a/servers/rs/proto.h
+++ b/servers/rs/proto.h
@@ -75,7 +75,6 @@ _PROTOTYPE( struct rproc* lookup_slot_by_label, (char *label) );
 _PROTOTYPE( struct rproc* lookup_slot_by_pid, (pid_t pid) );
 _PROTOTYPE( int alloc_slot, (struct rproc **rpp) );
 _PROTOTYPE( void free_slot, (struct rproc *rp) );
-_PROTOTYPE( int run_script, (struct rproc *rp) );
 _PROTOTYPE( char *get_next_label, (char *ptr, char *label, char *caller_label));
 _PROTOTYPE( void add_forward_ipc, (struct rproc *rp, struct priv *privp) );
 _PROTOTYPE( void add_backward_ipc, (struct rproc *rp, struct priv *privp) );
diff --git a/servers/vfs/device.c b/servers/vfs/device.c
index 8f30e0ee1..8c105e555 100644
--- a/servers/vfs/device.c
+++ b/servers/vfs/device.c
@@ -827,7 +827,6 @@ PUBLIC void dev_up(int maj)
   struct vmnt *vmp;
   struct fproc *rfp;
   struct vnode *vp;
-  message m;
 
   /* Open a device once for every filp that's opened on it,
    * and once for every filesystem mounted from it.
diff --git a/servers/vfs/link.c b/servers/vfs/link.c
index a74da279e..8d62183be 100644
--- a/servers/vfs/link.c
+++ b/servers/vfs/link.c
@@ -30,7 +30,6 @@ PUBLIC int do_link()
 {
 /* Perform the link(name1, name2) system call. */
   int r = OK;
-  endpoint_t linked_fs_e, link_lastdir_fs_e;
   struct vnode *vp, *vp_d;
 
   /* See if 'name1' (file to be linked to) exists. */ 
@@ -72,7 +71,6 @@ PUBLIC int do_unlink()
  * is almost the same.  They differ only in some condition testing.  Unlink()
  * may be used by the superuser to do dangerous things; rmdir() may not.
  */
-  register struct fproc *rfp;
   struct vnode *vldirp, *vp;
   int r;
   
@@ -126,7 +124,6 @@ PUBLIC int do_rename()
 {
 /* Perform the rename(name1, name2) system call. */
   int r = OK, r1;
-  size_t len;
   struct vnode *old_dirp, *new_dirp, *vp;
   char old_name[PATH_MAX+1];
   
@@ -218,7 +215,6 @@ PUBLIC int do_truncate()
 PUBLIC int do_ftruncate()
 {
 /* As with do_truncate(), truncate_vnode() does the actual work. */
-  int r;
   struct filp *rfilp;
   
   if ((off_t) m_in.flength < 0) return(EINVAL);
@@ -255,9 +251,8 @@ off_t newsize;
 PUBLIC int do_slink()
 {
 /* Perform the symlink(name1, name2) system call. */
-  int r, linklen;
+  int r;
   struct vnode *vp;
-  char string[NAME_MAX];       /* last component of the new dir's path name */
 
   if(m_in.name1_length <= 1) return(ENOENT);
   if(m_in.name1_length >= SYMLINK_MAX) return(ENAMETOOLONG);
diff --git a/servers/vfs/misc.c b/servers/vfs/misc.c
index 2e33d7baf..ae6701ff6 100644
--- a/servers/vfs/misc.c
+++ b/servers/vfs/misc.c
@@ -151,8 +151,6 @@ PUBLIC int do_fcntl()
 
   register struct filp *f;
   int new_fd, r, fl;
-  long cloexec_mask;		/* bit map for the FD_CLOEXEC flag */
-  long clo_value;		/* FD_CLOEXEC flag in proper position */
   struct filp *dummy;
 
   /* Is the file descriptor valid? */
@@ -533,7 +531,7 @@ int ngroups;
 gid_t *groups;
 {
   struct fproc *rfp;
-  int slot, i;
+  int slot;
 
   okendpt(proc_e, &slot);
   rfp = &fproc[slot];
@@ -623,7 +621,7 @@ PUBLIC int pm_dumpcore(proc_e, seg_ptr)
 int proc_e;
 struct mem_map *seg_ptr;
 {
-	int r, proc_s;
+	int proc_s;
 	
 	/* Terminate the process */
 	okendpt(proc_e, &proc_s);
diff --git a/servers/vfs/mount.c b/servers/vfs/mount.c
index eb2434c1b..99ddc1c72 100644
--- a/servers/vfs/mount.c
+++ b/servers/vfs/mount.c
@@ -128,7 +128,6 @@ PRIVATE int mount_fs(endpoint_t fs_e)
   struct fproc *tfp;
   struct dmap *dp;
   dev_t dev;
-  message m;
   struct vnode *root_node, *vp = NULL, *bspec;
   struct vmnt *vmp;
   char *label;
@@ -405,11 +404,10 @@ PUBLIC int unmount(dev, label)
 Dev_t dev;				/* block-special device */
 char *label;				/* buffer to retrieve label, or NULL */
 {
-  struct vnode *vp, *vi;
+  struct vnode *vp;
   struct vmnt *vmp_i = NULL, *vmp = NULL;
   struct dmap *dp;
   int count, r;
-  int fs_e;
   
   /* Find vmnt that is to be unmounted */
   for(vmp_i = &vmnt[0]; vmp_i < &vmnt[NR_MNTS]; ++vmp_i) {
@@ -496,7 +494,6 @@ int allow_mountpt;
  * and the path is the root node of a mounted file system, return that device
  * number. In all other cases, return NO_DEV and an error code in 'err_code'.
  */
-  int r;
   dev_t dev;
   struct vnode *vp;
   
@@ -522,7 +519,7 @@ int allow_mountpt;
 /*===========================================================================*
  *                              is_nonedev				     *
  *===========================================================================*/
-PRIVATE int is_nonedev(dev)
+PRIVATE int is_nonedev(int dev)
 {
 /* Return whether the given device is a "none" pseudo device.
  */
diff --git a/servers/vfs/open.c b/servers/vfs/open.c
index 2952f1604..9282e00a6 100644
--- a/servers/vfs/open.c
+++ b/servers/vfs/open.c
@@ -247,7 +247,6 @@ PRIVATE struct vnode *new_node(int oflags, mode_t bits)
   struct vnode *dirp, *vp;
   int r, flags;
   struct node_details res;
-  struct vnode *rest;
 
   /* When O_CREAT and O_EXCL flags are set, the path may not be named by a
    * symbolic link. */
diff --git a/servers/vfs/path.c b/servers/vfs/path.c
index 1d2f65299..da89b86ac 100644
--- a/servers/vfs/path.c
+++ b/servers/vfs/path.c
@@ -111,7 +111,6 @@ PUBLIC struct vnode *last_dir(void)
  * and parse the path up to the penultimate component.
  */  
 
-  int r;
   size_t len;
   char *cp;
   char dir_entry[PATH_MAX+1];
diff --git a/servers/vfs/pipe.c b/servers/vfs/pipe.c
index 1a1521976..12148c450 100644
--- a/servers/vfs/pipe.c
+++ b/servers/vfs/pipe.c
@@ -46,7 +46,6 @@ PUBLIC int do_pipe()
   struct filp *fil_ptr0, *fil_ptr1;
   int fil_des[2];		/* reply goes here */
   struct vnode *vp;
-  struct vmnt *vmp;
   struct node_details res;
 
   /* See if a free vnode is available */
@@ -581,7 +580,7 @@ int proc_nr_e;
  *===========================================================================*/
 PUBLIC int select_request_pipe(struct filp *f, int *ops, int block)
 {
-	int orig_ops, r = 0, err, canwrite;
+	int orig_ops, r = 0, err;
 	orig_ops = *ops;
 	if ((*ops & (SEL_RD|SEL_ERR))) {
 		if ((err = pipe_check(f->filp_vno, READING, 0,
diff --git a/servers/vfs/protect.c b/servers/vfs/protect.c
index b72828c4f..10fa125e7 100644
--- a/servers/vfs/protect.c
+++ b/servers/vfs/protect.c
@@ -75,8 +75,6 @@ PUBLIC int do_chmod()
 PUBLIC int do_chown()
 {
 /* Perform the chmod(name, mode) and fchmod(fd, mode) system calls. */
-  int inode_nr;
-  int fs_e;
   struct filp *flp;
   struct vnode *vp;
   int r;
@@ -173,11 +171,10 @@ PUBLIC int forbidden(struct vnode *vp, mode_t access_desired)
  * if it is forbidden, EACCES is returned.
  */
 
-  register struct super_block *sp;
   register mode_t bits, perm_bits;
   uid_t uid;
   gid_t gid;
-  int r, shift, type;
+  int r, shift;
 
   if (vp->v_uid == (uid_t) -1 || vp->v_gid == (gid_t) -1) return(EACCES);
 
diff --git a/servers/vfs/read.c b/servers/vfs/read.c
index 819805a3d..a1a377c8e 100644
--- a/servers/vfs/read.c
+++ b/servers/vfs/read.c
@@ -43,14 +43,11 @@ int rw_flag;			/* READING or WRITING */
 /* Perform read(fd, buffer, nbytes) or write(fd, buffer, nbytes) call. */
   register struct filp *f;
   register struct vnode *vp;
-  off_t bytes_left;
   u64_t position, res_pos, new_pos;
-  unsigned int off, cum_io, cum_io_incr, res_cum_io;
-  int op, oflags, r, chunk, block_spec, char_spec;
+  unsigned int cum_io, cum_io_incr, res_cum_io;
+  int op, oflags, r, block_spec, char_spec;
   int regular;
   mode_t mode_word;
-  phys_bytes p;
-  struct dmap *dp;
 
   /* If the file descriptor is valid, get the vnode, size and mode. */
   if (m_in.nbytes < 0) return(EINVAL);
@@ -154,7 +151,6 @@ PUBLIC int do_getdents()
 /* Perform the getdents(fd, buf, size) system call. */
   int r;
   u64_t new_pos;
-  cp_grant_id_t gid;
   register struct filp *rfilp;
 
   /* Is the file descriptor valid? */
@@ -191,10 +187,10 @@ struct filp *f;
 char *buf;
 size_t req_size;
 {
-  int r, oflags, partial_pipe = 0, r2;
-  size_t size, cum_io, cum_io_incr, cum_io_incr2;
+  int r, oflags, partial_pipe = 0;
+  size_t size, cum_io, cum_io_incr;
   struct vnode *vp;
-  u64_t position, new_pos, new_pos2;
+  u64_t position, new_pos;
 
   oflags = f->filp_flags;
   vp = f->filp_vno;
diff --git a/servers/vfs/request.c b/servers/vfs/request.c
index ef5f4aeab..9b0993e06 100644
--- a/servers/vfs/request.c
+++ b/servers/vfs/request.c
@@ -12,9 +12,7 @@
 #include <sys/stat.h>
 #include <sys/statfs.h>
 #include <minix/vfsif.h>
-#include <minix/callnr.h>
 #include <minix/com.h>
-#include <minix/keymap.h>
 #include <minix/const.h>
 #include <minix/endpoint.h>
 #include <minix/u64.h>
@@ -1027,7 +1025,6 @@ PRIVATE int fs_sendrec_f(char *file, int line, endpoint_t fs_e, message *reqm)
  */
   int r, old_driver_e, new_driver_e;
   message origm, m;
-  struct vmnt *vmp;
 
   if(fs_e <= 0 || fs_e == NONE)
 	panic("talking to bogus endpoint: %d", fs_e);
diff --git a/servers/vfs/select.c b/servers/vfs/select.c
index e435b43a1..46880cdf7 100644
--- a/servers/vfs/select.c
+++ b/servers/vfs/select.c
@@ -714,7 +714,7 @@ PUBLIC void select_unsuspend_by_endpt(endpoint_t proc_e)
  *===========================================================================*/
 PUBLIC void select_reply1()
 {
-	int i, s, minor, status;
+	int i, minor, status;
 	endpoint_t driver_e;
 	dev_t dev;
 	struct filp *fp;
diff --git a/servers/vfs/stadir.c b/servers/vfs/stadir.c
index 7beffde92..30a0d6ce9 100644
--- a/servers/vfs/stadir.c
+++ b/servers/vfs/stadir.c
@@ -75,7 +75,6 @@ int len;			/* length of the directory name string */
 {
 /* Do the actual work for chdir() and chroot(). */
   struct vnode *vp;
-  int r;
 
   /* Try to open the directory */
   if (fetch_name(name_ptr, len, M3) != OK) return(err_code);
diff --git a/servers/vfs/time.c b/servers/vfs/time.c
index 3415ec689..7ee63e57b 100644
--- a/servers/vfs/time.c
+++ b/servers/vfs/time.c
@@ -22,7 +22,6 @@ PUBLIC int do_utime()
 /* Perform the utime(name, timep) system call. */
   register int len;
   int r;
-  uid_t uid;
   time_t actime, modtime;
   struct vnode *vp;
   
diff --git a/servers/vfs/utility.c b/servers/vfs/utility.c
index 0a97a729f..02509c2b0 100644
--- a/servers/vfs/utility.c
+++ b/servers/vfs/utility.c
@@ -92,7 +92,7 @@ PUBLIC int isokendpt_f(char *file, int line, int endpoint, int *proc, int fatal)
   endpoint_t ke;
   *proc = _ENDPOINT_P(endpoint);
   if(endpoint == NONE) {
-	printf("vfs:%s: endpoint is NONE\n", file, line, endpoint);
+	printf("vfs:%s:%d: endpoint is NONE\n", file, line);
 	failed = 1;
   } else if(*proc < 0 || *proc >= NR_PROCS) {
 	printf("vfs:%s:%d: proc (%d) from endpoint (%d) out of range\n",