linux-kernel - [PATCH] x86 reboot: Remove inb

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Date:	Sat, 19 Jan 2008 15:44:53 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	mingo@...hat.com, akpm@...l.org, linux-kernel@...r.kernel.org
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@...hat.com>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.24-rc8-mm1/arch/x86/kernel/reboot.c linux-2.6.24-rc8-mm1/arch/x86/kernel/reboot.c
--- linux.vanilla-2.6.24-rc8-mm1/arch/x86/kernel/reboot.c	2008-01-19 14:47:55.000000000 +0000
+++ linux-2.6.24-rc8-mm1/arch/x86/kernel/reboot.c	2008-01-19 14:53:58.000000000 +0000
@@ -319,9 +319,11 @@
 {
 	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)
--
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