From 60f3d61acd01af4990263bb4d3e1aec8cf115f48 Mon Sep 17 00:00:00 2001
From: Bernard Xiong <bernard.xiong@gmail.com>
Date: Wed, 29 Aug 2018 02:35:51 +0100
Subject: [PATCH] [Kernel] Fix the compiling warning

---
 src/signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/signal.c b/src/signal.c
index 5b93c774df..b2193957bc 100644
--- a/src/signal.c
+++ b/src/signal.c
@@ -147,7 +147,7 @@ static void _signal_deliver(rt_thread_t tid)
 
 rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler)
 {
-    rt_sighandler_t old;
+    rt_sighandler_t old = RT_NULL;
     rt_thread_t tid = rt_thread_self();
 
     if (!sig_valid(signo)) return SIG_ERR;