xtensa: Use irq_set_affinity instead of homebrewn code

There is no point in having an incomplete copy of irq_set_affinity()
for the hotplug irq migration code.

Use the core function instead and while at it switch to
for_each_active_irq()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chris Zankel <chris@zankel.net>
Cc: xtensa <linux-xtensa@linux-xtensa.org>
Link: http://lkml.kernel.org/r/20140223212736.664624945@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 19 deletions

diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index 482868a2de6e..3eee94f621eb 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -155,18 +155,6 @@ void __init init_IRQ(void)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
-{
-        struct irq_desc *desc = irq_to_desc(irq);
-        struct irq_chip *chip = irq_data_get_irq_chip(data);
-        unsigned long flags;
-
-        raw_spin_lock_irqsave(&desc->lock, flags);
-        if (chip->irq_set_affinity)
-                chip->irq_set_affinity(data, cpumask_of(cpu), false);
-        raw_spin_unlock_irqrestore(&desc->lock, flags);
-}
-
 /*
  * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
  * the affinity settings do not allow other CPUs, force them onto any
@@ -175,10 +163,9 @@ static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
 void migrate_irqs(void)
 {
         unsigned int i, cpu = smp_processor_id();
-        struct irq_desc *desc;
 
-        for_each_irq_desc(i, desc) {
-                struct irq_data *data = irq_desc_get_irq_data(desc);
+        for_each_active_irq(i) {
+                struct irq_data *data = irq_get_irq_data(i);
                 unsigned int newcpu;
 
                 if (irqd_is_per_cpu(data))
@@ -194,11 +181,8 @@ void migrate_irqs(void)
                                             i, cpu);
 
                         cpumask_setall(data->affinity);
-                        newcpu = cpumask_any_and(data->affinity,
-                                                 cpu_online_mask);
                 }
-
-                route_irq(data, i, newcpu);
+                irq_set_affinity(i, data->affinity);
         }
 }
 #endif /* CONFIG_HOTPLUG_CPU */