[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 <[email protected]> Signed-off-by: Andi Kleen <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mna · Jun 26, 2006 · 899ced0 · 899ced0
1 parent cab093b
commit 899ced0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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)