[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>

diff --git a/include/asm-x86_64/apic.h b/include/asm-x86_64/apic.h
index 9d43ac8519bffa5b2408cfd00b968ac25fccad9a..9c96a0a8d1bd3c07f4e600e180135e7c7e12e8a4 100644 (file)
--- 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)