diff --git a/arch/arm/src/efm32/efm32_clockconfig.c b/arch/arm/src/efm32/efm32_clockconfig.c
index bae57c55949..75af2d75898 100644
--- a/arch/arm/src/efm32/efm32_clockconfig.c
+++ b/arch/arm/src/efm32/efm32_clockconfig.c
@@ -504,9 +504,9 @@ static inline uint32_t efm32_hfclk_config(uint32_t hfclksel, uint32_t hfclkdiv)
 #ifdef CONFIG_EFM32_LECLOCK
 uint32_t efm32_coreleclk_config( int frequency )
 {
+#ifdef CMU_CTRL_HFLE
   uint32_t regval;
 
-#ifdef CMU_CTRL_HFLE
   /* Check if the core frequency is higher than CMU_MAX_FREQ_HFLE */
 
    if (frequency > CMU_MAX_FREQ_HFLE)
diff --git a/arch/arm/src/lpc11xx/lpc11_serial.c b/arch/arm/src/lpc11xx/lpc11_serial.c
index 62d55789601..2db88cf11ac 100644
--- a/arch/arm/src/lpc11xx/lpc11_serial.c
+++ b/arch/arm/src/lpc11xx/lpc11_serial.c
@@ -64,6 +64,7 @@
 #include "chip.h"
 #include "chip/lpc11_uart.h"
 #include "lpc11_gpio.h"
+#include "lpc11_lowgetc.h"
 #include "lpc11_serial.h"
 
 /****************************************************************************
diff --git a/arch/arm/src/lpc17xx/lpc17_usbhost.c b/arch/arm/src/lpc17xx/lpc17_usbhost.c
index 7bde7678272..6338dbf9646 100644
--- a/arch/arm/src/lpc17xx/lpc17_usbhost.c
+++ b/arch/arm/src/lpc17xx/lpc17_usbhost.c
@@ -1788,6 +1788,7 @@ static int lpc17_usbinterrupt(int irq, void *context)
 
           td = (struct lpc17_gtd_s *)(HCCA->donehead & HCCA_DONEHEAD_MASK);
           HCCA->donehead = 0;
+          next = NULL;
 
           /* Process each TD in the write done list */
 
diff --git a/arch/arm/src/lpc31xx/lpc31_usbdev.c b/arch/arm/src/lpc31xx/lpc31_usbdev.c
index 761b4e5825b..caac8970923 100644
--- a/arch/arm/src/lpc31xx/lpc31_usbdev.c
+++ b/arch/arm/src/lpc31xx/lpc31_usbdev.c
@@ -2106,7 +2106,6 @@ static int lpc31_epsubmit(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *r
 static int lpc31_epcancel(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req)
 {
   FAR struct lpc31_ep_s *privep = (FAR struct lpc31_ep_s *)ep;
-  FAR struct lpc31_usbdev_s *priv;
   irqstate_t flags;
 
 #ifdef CONFIG_DEBUG
@@ -2118,7 +2117,6 @@ static int lpc31_epcancel(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *r
 #endif
 
   usbtrace(TRACE_EPCANCEL, privep->epphy);
-  priv = privep->dev;
 
   flags = irqsave();
 
diff --git a/arch/arm/src/sam34/sam_lowputc.c b/arch/arm/src/sam34/sam_lowputc.c
index 9c7636c416d..9cb9a0eecbc 100644
--- a/arch/arm/src/sam34/sam_lowputc.c
+++ b/arch/arm/src/sam34/sam_lowputc.c
@@ -42,7 +42,6 @@
 #include <stdint.h>
 
 #include <arch/irq.h>
-#include <arch/board/board.h>
 
 #include "up_internal.h"
 #include "up_arch.h"
@@ -61,7 +60,10 @@
 #  error Unknown UART
 #endif
 
+/* The board.h file may redefine pin configurations defined in sam_pinmap.h */
+
 #include "chip/sam_pinmap.h"
+#include <arch/board/board.h>
 
 /**************************************************************************
  * Pre-processor Definitions
diff --git a/arch/arm/src/sama5/sam_clockconfig.c b/arch/arm/src/sama5/sam_clockconfig.c
index d34a07fa084..5df01d159a3 100644
--- a/arch/arm/src/sama5/sam_clockconfig.c
+++ b/arch/arm/src/sama5/sam_clockconfig.c
@@ -135,7 +135,7 @@ static void __ramfunc__ sam_pmcwait(uint32_t bit)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_enablemosc(void)
+static void __ramfunc__ sam_enablemosc(void)
 {
   uint32_t regval;
 
@@ -190,7 +190,7 @@ static inline void __ramfunc__ sam_enablemosc(void)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_selectmosc(void)
+static void __ramfunc__ sam_selectmosc(void)
 {
   uint32_t regval;
 
@@ -218,7 +218,7 @@ static inline void __ramfunc__ sam_selectmosc(void)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_pllasetup(void)
+static void __ramfunc__ sam_pllasetup(void)
 {
   uint32_t regval;
 
@@ -255,7 +255,7 @@ static inline void __ramfunc__ sam_pllasetup(void)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_plladivider(void)
+static void __ramfunc__ sam_plladivider(void)
 {
   uint32_t regval;
 
@@ -306,7 +306,7 @@ static inline void __ramfunc__ sam_plladivider(void)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_mckprescaler(void)
+static void __ramfunc__ sam_mckprescaler(void)
 {
   uint32_t regval;
 
@@ -333,7 +333,7 @@ static inline void __ramfunc__ sam_mckprescaler(void)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_mckdivider(void)
+static void __ramfunc__ sam_mckdivider(void)
 {
   uint32_t regval;
 
@@ -365,7 +365,7 @@ static inline void __ramfunc__ sam_mckdivider(void)
  ****************************************************************************/
 
 #ifdef PMC_MCKR_H32MXDIV
-static inline void __ramfunc__ sam_h32mxdivider(void)
+static void __ramfunc__ sam_h32mxdivider(void)
 {
   uint32_t regval;
 
@@ -397,7 +397,7 @@ static inline void __ramfunc__ sam_h32mxdivider(void)
  ****************************************************************************/
 
 #if defined(NEED_PLLSETUP)
-static inline void __ramfunc__ sam_selectplla(void)
+static void __ramfunc__ sam_selectplla(void)
 {
   uint32_t regval;
 
diff --git a/arch/arm/src/stm32/stm32_can.c b/arch/arm/src/stm32/stm32_can.c
index 2b5d83b8942..297394abd25 100644
--- a/arch/arm/src/stm32/stm32_can.c
+++ b/arch/arm/src/stm32/stm32_can.c
@@ -1127,7 +1127,7 @@ errout:
   regval  = can_getreg(priv, STM32_CAN_RF0R_OFFSET);
   regval |= CAN_RFR_RFOM;
   can_putreg(priv, STM32_CAN_RF0R_OFFSET, regval);
-  return OK;
+  return ret;
 }
 
 /****************************************************************************
diff --git a/arch/arm/src/tiva/tiva_lowputc.h b/arch/arm/src/tiva/tiva_lowputc.h
index 348b1865d6a..405813ee8fb 100644
--- a/arch/arm/src/tiva/tiva_lowputc.h
+++ b/arch/arm/src/tiva/tiva_lowputc.h
@@ -41,6 +41,7 @@
  ************************************************************************************/
 
 #include <nuttx/config.h>
+#include <arch/tiva/chip.h>
 
 /************************************************************************************
  * Pre-processor Definitions