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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>
This commit is contained in:
Thomas Gleixner 2014-02-23 21:40:10 +00:00
parent 5c331c8626
commit b58d971da3
1 changed files with 3 additions and 19 deletions
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22
arch/xtensa/kernel/irq.c
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@ -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 */