Eliminate warnings

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@142 42af7a65-404d-4744-a932-0658087f49c3

arch/dm320/src/up_exit.c

@@ -128,7 +128,12 @@ static void _up_dumponexit(FAR _TCB *tcb, FAR void *arg)
 void _exit(int status)
 {
   _TCB* tcb = (_TCB*)g_readytorun.head;
-  irqstate_t flags = irqsave();
+
+  /* Disable interrupts.  They will be restored when the next
+   * task is started.
+   */
+
+  (void)irqsave();
 
   lldbg("TCB=%p exitting\n", tcb);
 

arch/dm320/src/up_timerisr.c

@@ -132,8 +132,6 @@ int up_timerisr(int irq, uint32 *regs)
 
 void up_timerinit(void)
 {
-  uint32 val;
-
   up_disable_irq(DM320_IRQ_SYSTIMER);
 
   /* Start timer0 running so that an interrupt is generated at