diff --git a/arch/arm/src/rtl8720c/ameba_nvic.c b/arch/arm/src/rtl8720c/ameba_nvic.c
index 060d3d5f0e..5dd1287f4f 100644
--- a/arch/arm/src/rtl8720c/ameba_nvic.c
+++ b/arch/arm/src/rtl8720c/ameba_nvic.c
@@ -82,21 +82,6 @@ static int (* __vectors[NR_IRQS - NVIC_IRQ_FIRST])(void);
  * Private Functions
  ****************************************************************************/
 
-/****************************************************************************
- * Name: up_getsp
- ****************************************************************************/
-
-static inline uint32_t up_getsp(void)
-{
-  uint32_t sp;
-  __asm__
-  (
-    "\tmov %0, sp\n\t"
-    : "=r"(sp)
-  );
-  return sp;
-}
-
 /****************************************************************************
  * Name: nvic_irqinfo
  *