From 46fec91b12ccb60c73e3643f8e3b16759ffb5539 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 1 Jul 2015 18:25:13 -0600
Subject: [PATCH] Remove a warning

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

diff --git a/arch/arm/src/stm32/stm32_serial.c b/arch/arm/src/stm32/stm32_serial.c
index 077bb71641..b0edc1be14 100644
--- a/arch/arm/src/stm32/stm32_serial.c
+++ b/arch/arm/src/stm32/stm32_serial.c
@@ -2761,6 +2761,7 @@ void up_serialinit(void)
 #ifdef CONFIG_PM
   ret = pm_register(&g_serialcb);
   DEBUGASSERT(ret == OK);
+  UNUSED(ret);
 #endif
 
   /* Register the console */