diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 5b32f0b4d133cac1129d9d166e1d0ffbc1921e81..5818dc28167d71bee82c305a85410192ef59e2b1 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)