Fix printfs with too few or too many parms, remove unused vars, fix incorrect flag tests, other code cleanup.

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;

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++) {

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;

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; }