x86: block irq balancing for timer

Disable irq balancing on IRQ0.  Several SIS chipsets lock up when you try to
change affinity of IRQ #0.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>

diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index 6d48a4e826d9d1f27dc0cf6a76b0d98b8ba3ffbb..2db4d698a2d3c999059ca9dcec8865591f3a3009 100644 (file)
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -360,7 +360,7 @@ void stop_timer_interrupt(void)
 
 static struct irqaction irq0 = {
        .handler        = timer_interrupt,
-       .flags          = IRQF_DISABLED | IRQF_IRQPOLL,
+       .flags          = IRQF_DISABLED | IRQF_IRQPOLL | IRQF_NOBALANCING,
        .mask           = CPU_MASK_NONE,
        .name           = "timer"
 };