diff --git a/arch/arm/src/sam34/sam4l_gpio.c b/arch/arm/src/sam34/sam4l_gpio.c
index bb312db0bc..d7e6a2b6cd 100644
--- a/arch/arm/src/sam34/sam4l_gpio.c
+++ b/arch/arm/src/sam34/sam4l_gpio.c
@@ -218,13 +218,13 @@ static inline int sam_configinterrupt(uintptr_t base, uint32_t pin,
 
       if (edges == GPIO_INT_RISING)
         {
-          /* Rising only.. disable interrrupts on the falling edge */
+          /* Rising only.. disable interrupts on the falling edge */
 
           putreg32(pin, base + SAM_GPIO_IMR0S_OFFSET);
         }
       else if (edges == GPIO_INT_FALLING)
         {
-          /* Falling only.. disable interrrupts on the rising edge */
+          /* Falling only.. disable interrupts on the rising edge */
 
           putreg32(pin, base + SAM_GPIO_IMR1S_OFFSET);
         }
diff --git a/arch/arm/src/samd/sam_clockconfig.c b/arch/arm/src/samd/sam_clockconfig.c
index 0fef4a3b3a..e6c5f5868a 100644
--- a/arch/arm/src/samd/sam_clockconfig.c
+++ b/arch/arm/src/samd/sam_clockconfig.c
@@ -441,7 +441,7 @@ static inline void sam_osc32k_config(void)
 
   /* Recover OSC32K calibration data from OTP "fuse" memory */
 
-  regval  = getreg32(SYSCTRL_FUSES_OSC32KCAL_ADDR)
+  regval  = getreg32(SYSCTRL_FUSES_OSC32KCAL_ADDR);
   calib   = (regval & SYSCTRL_FUSES_OSC32KCAL_MASK) >> SYSCTRL_FUSES_OSC32KCAL_SHIFT;
   regval  = calib << SYSCTRL_OSC32K_CALIB_SHIFT;
 
diff --git a/arch/arm/src/stm32/stm32_procfs_ccm.c b/arch/arm/src/stm32/stm32_procfs_ccm.c
index f3da37b7b7..49b3a7351b 100644
--- a/arch/arm/src/stm32/stm32_procfs_ccm.c
+++ b/arch/arm/src/stm32/stm32_procfs_ccm.c
@@ -206,7 +206,6 @@ static ssize_t ccm_read(FAR struct file *filep, FAR char *buffer,
                            size_t buflen)
 {
   FAR struct ccm_file_s *priv;
-  ssize_t ret = 0;
   size_t linesize;
   size_t copysize;
   size_t remaining;