diff --git a/arch/arm/src/common/up_mdelay.c b/arch/arm/src/common/up_mdelay.c
index 2c044762068..79e3e4ad6f7 100644
--- a/arch/arm/src/common/up_mdelay.c
+++ b/arch/arm/src/common/up_mdelay.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  *  arch/arm/src/common/up_mdelay.c
  *
- *   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2008, 2014 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -78,13 +78,13 @@
 
 void up_mdelay(unsigned int milliseconds)
 {
-  volatile int i;
-  volatile int j;
+  volatile unsigned int i;
+  volatile unsigned int j;
 
   for (i = 0; i < milliseconds; i++)
     {
-        for (j = 0; j < CONFIG_BOARD_LOOPSPERMSEC; j++)
-          {
-          }
+      for (j = 0; j < CONFIG_BOARD_LOOPSPERMSEC; j++)
+        {
+        }
     }
 }
diff --git a/arch/arm/src/stm32/stm32_otgfsdev.c b/arch/arm/src/stm32/stm32_otgfsdev.c
index 30ebd597776..e9cf95a635f 100644
--- a/arch/arm/src/stm32/stm32_otgfsdev.c
+++ b/arch/arm/src/stm32/stm32_otgfsdev.c
@@ -1324,11 +1324,11 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
        */
 
       regval = stm32_getreg(regaddr);
-      if ((regval & OTGFS_DTXFSTS_MASK) < nwords)
+      if ((int)(regval & OTGFS_DTXFSTS_MASK) < nwords)
         {
           usbtrace(TRACE_INTDECODE(STM32_TRACEINTID_EPIN_EMPWAIT), (uint16_t)regval);
 
-          /* There is insufficent space in the TxFIFO.  Wait for a TxFIFO
+          /* There is insufficient space in the TxFIFO.  Wait for a TxFIFO
            * empty interrupt and try again.
            */
 
diff --git a/arch/arm/src/stm32/stm32_rcc.h b/arch/arm/src/stm32/stm32_rcc.h
index 813b9b22d3f..80eac8d0a3c 100644
--- a/arch/arm/src/stm32/stm32_rcc.h
+++ b/arch/arm/src/stm32/stm32_rcc.h
@@ -1,7 +1,7 @@
 /************************************************************************************
  * arch/arm/src/stm32/stm32_rcc.h
  *
- *   Copyright (C) 2009, 2011-2013 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009, 2011-2014 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.orgr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -285,6 +285,16 @@ void stm32_rcc_enablelse(void);
 
 void stm32_rcc_enablelsi(void);
 
+/****************************************************************************
+ * Name: stm32_rcc_disablelsi
+ *
+ * Description:
+ *   Disable the Internal Low-Speed (LSI) RC Oscillator.
+ *
+ ****************************************************************************/
+
+void stm32_rcc_disablelsi(void);
+
 #undef EXTERN
 #if defined(__cplusplus)
 }
diff --git a/arch/arm/src/stm32/stm32_sdio.c b/arch/arm/src/stm32/stm32_sdio.c
index ea06deade47..156d233d83e 100644
--- a/arch/arm/src/stm32/stm32_sdio.c
+++ b/arch/arm/src/stm32/stm32_sdio.c
@@ -1023,7 +1023,7 @@ static void stm32_sendfifo(struct stm32_dev_s *priv)
            int i;
 
            data.w = 0;
-           for (i = 0; i < priv->remaining; i++)
+           for (i = 0; i < (int)priv->remaining; i++)
              {
                 data.b[i] = *ptr++;
              }
@@ -1085,7 +1085,7 @@ static void stm32_recvfifo(struct stm32_dev_s *priv)
           uint8_t *ptr = (uint8_t*)priv->buffer;
           int i;
 
-          for (i = 0; i < priv->remaining; i++)
+          for (i = 0; i < (int)priv->remaining; i++)
             {
                *ptr++ = data.b[i];
             }