From 899ced0dd9457b9c349663ca4cb4ec09167728a6 Mon Sep 17 00:00:00 2001
From: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
Date: Mon, 26 Jun 2006 13:59:29 +0200
Subject: [PATCH] [PATCH] x86_64: Add cpu_relax to apic_wait_icr_idle
This one is adding a cpu_relax() that already existed in the i386 version.
Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
include/asm-x86_64/apic.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/asm-x86_64/apic.h b/include/asm-x86_64/apic.h
index 9d43ac8519bf..9c96a0a8d1bd 100644
--- a/include/asm-x86_64/apic.h
+++ b/include/asm-x86_64/apic.h
@@ -49,7 +49,8 @@ static __inline unsigned int apic_read(unsigned long reg)
static __inline__ void apic_wait_icr_idle(void)
{
- while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY );
+ while (apic_read( APIC_ICR ) & APIC_ICR_BUSY)
+ cpu_relax();
}
static inline void ack_APIC_irq(void)