boards/cpu: fix some warnings

boards/msb-430-common/uart1.c

@@ -49,7 +49,6 @@ interrupt(USART1RX_VECTOR) usart0irq(void)
 {
     U1TCTL &= ~URXSE; /* Clear the URXS signal */
     U1TCTL |= URXSE;  /* Re-enable URXS - needed here?*/
-    int c = 0;
     /* Check status register for receive errors. */
     if(U1RCTL & RXERR) {
         if (U1RCTL & FE) {
@@ -65,11 +64,12 @@ interrupt(USART1RX_VECTOR) usart0irq(void)
             puts("rx break error");
         }
         /* Clear error flags by forcing a dummy read. */
-        c = U1RXBUF;
+        volatile int c = U1RXBUF;
+        (void) c;
     }
 #ifdef MODULE_UART0
     else if (uart0_handler_pid) {
-        c = U1RXBUF;
+        volatile int c = U1RXBUF;
         uart0_handle_incoming(c);
         uart0_notify_thread();
     }

boards/redbee-econotag/drivers/redbee_uart1.c

@@ -14,12 +14,11 @@
 
 void uart1_isr(void)
 {
-    uint32_t i = 0;
-
     if (UART1->USTATbits.RXRDY == 1) {
 #ifdef MODULE_UART0
 
         if (uart0_handler_pid) {
+            uint32_t i = 0;
             while (UART1->RXCON != 0) {
                 uart0_handle_incoming(UART1->DATA);
 
@@ -54,4 +53,4 @@ uint8_t uart1_getc(void)
     }
 
     return UART1->DATA;
-}
+}

boards/redbee-econotag/drivers/redbee_uart2.c

@@ -14,12 +14,11 @@
 
 void uart2_isr(void)
 {
-    uint32_t i = 0;
-
     if (UART2->USTATbits.RXRDY == 1) {
 #ifdef MODULE_UART0
 
         if (uart0_handler_pid) {
+            uint32_t i = 0;
             while (UART2->RXCON != 0) {
                 uart0_handle_incoming(UART2->DATA);
 
@@ -54,4 +53,4 @@ uint8_t uart2_getc(void)
     }
 
     return UART2->DATA;
-}
+}

boards/telosb/uart.c

@@ -83,8 +83,6 @@ void usart1irq(void);
  */
 interrupt(USART1RX_VECTOR) usart1irq(void)
 {
-    int c = 0;
-
     /* Check status register for receive errors. */
     if (U1RCTL & RXERR) {
         if (U1RCTL & FE) {
@@ -104,12 +102,13 @@ interrupt(USART1RX_VECTOR) usart1irq(void)
         }
 
         /* Clear error flags by forcing a dummy read. */
-        c = U1RXBUF;
+        volatile int c = U1RXBUF;
+        (void) c;
     }
 
 #ifdef MODULE_UART0
     else if (uart0_handler_pid) {
-        c = U1RXBUF;
+        volatile int c = U1RXBUF;
         uart0_handle_incoming(c);
         uart0_notify_thread();
     }

cpu/arm_common/gettimeofday.c

@@ -38,6 +38,7 @@ int _gettimeofday(struct timeval *tp, void *restrict tzp)
 #elif defined MODULE_VTIMER
     vtimer_gettimeofday(tp);
 #else
+    (void) tp;
     __gettimeofday_syscall_is_not_implemented_without_vtimer_or_rtc_module();
 #endif
 

cpu/cc430/flashrom.c

@@ -32,6 +32,8 @@ static inline void busy_wait(void);
  */
 uint8_t flashrom_erase(uint8_t *addr)
 {
+    (void) addr;
+
     return 0;
 }
 
@@ -40,6 +42,10 @@ uint8_t flashrom_erase(uint8_t *addr)
  */
 uint8_t flashrom_write(uint8_t *dst, const uint8_t *src, size_t size)
 {
+    (void) dst;
+    (void) src;
+    (void) size;
+
     return 0;
 }
 
@@ -56,6 +62,7 @@ static uint8_t prepare(void)
  */
 void finish(uint8_t istate)
 {
+    (void) istate;
 }
 
 static inline void busy_wait(void)