From c84d6af881be84687fa924f16b2f4b4690354165 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Wed, 30 Jan 2008 13:33:25 +0100
Subject: [PATCH] x86: reboot: remove inb_p usage

We are driving a motherboard port so use a 2uS explicit delay at this
point.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/kernel/reboot.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 5b32f0b4d13..5818dc28167 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -319,9 +319,11 @@ static inline void kb_wait(void)
 {
 	int i;
 
-	for (i = 0; i < 0x10000; i++)
-		if ((inb_p(0x64) & 0x02) == 0)
+	for (i = 0; i < 0x10000; i++) {
+		if ((inb(0x64) & 0x02) == 0)
 			break;
+		udelay(2);
+	}
 }
 
 void machine_emergency_restart(void)
-- 
2.20.1