x86: Skip migrating IRQF_PER_CPU irqs in fixup_irqs()

IRQF_PER_CPU means that the irq cannot be moved away from a given
cpu. So it must not be migrated when the cpu goes offline.

[ tglx: massaged changelog ]

Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jan Beulich <JBeulich@novell.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Link: http://lkml.kernel.org/r/%3C625BA99ED14B2D499DC4E29D8138F1505C8ED7F7E2%40shsmsx502.ccr.corp.intel.com%3E
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 1cb0b9fc78dccffd68a1c571e873043e0d28d007..544efe2741be49c92fb9bdfe98df2c0671c4dbdf 100644 (file)
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -249,7 +249,7 @@ void fixup_irqs(void)
 
                data = irq_desc_get_irq_data(desc);
                affinity = data->affinity;
-               if (!irq_has_action(irq) ||
+               if (!irq_has_action(irq) || irqd_is_per_cpu(data) ||
                    cpumask_subset(affinity, cpu_online_mask)) {
                        raw_spin_unlock(&desc->lock);
                        continue;