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>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 5b32f0b4d133..5818dc28167d 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)