From c8a13cf21394a3e376e1fb3a6a073b39485d0834 Mon Sep 17 00:00:00 2001
From: NAKAMURA Gou <go.nakamura.yw@hitachi-solutions.com>
Date: Wed, 16 Sep 2015 11:23:45 +0900
Subject: [PATCH] make gettimeofday ignore NULL parameter

---
 kernel/syscall.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/syscall.c b/kernel/syscall.c
index d824b25c..8ab21834 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -4978,6 +4978,11 @@ SYSCALL_DECLARE(gettimeofday)
 	struct syscall_request request IHK_DMA_ALIGN;
 	struct timezone *tz = (struct timezone *)ihk_mc_syscall_arg1(ctx);
 
+	if (!tv && !tz) {
+		/* nothing to do */
+		return 0;
+	}
+
 	/* Do it locally if supported */
 	if (!tz && gettime_local_support) {
 		update_cpu_local_time();