From 5ebc472f433736b1b98b2f8e9927e196ee078b9b Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 28 Oct 2014 06:42:53 -0600
Subject: [PATCH] STM32 Serial:  Don't compile up_earlyserialinit() if
 USE_EARLYSERIALINIT is not define.  Otherwise, a macro definition clobbers
 the function definition

---
 arch/arm/src/stm32/stm32_serial.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index f2de1642ebe..f1c6644f9ee 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -2547,6 +2547,7 @@ static int up_pm_prepare(struct pm_callback_s *cb, enum pm_state_e pmstate)
  *
  ****************************************************************************/
 
+#if USE_EARLYSERIALINIT
 void up_earlyserialinit(void)
 {
 #ifdef HAVE_UART
@@ -2569,6 +2570,7 @@ void up_earlyserialinit(void)
 #endif
 #endif /* HAVE UART */
 }
+#endif
 
 /****************************************************************************
  * Name: up_serialinit