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Commit b58d971d authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

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: default avatarThomas 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent 5c331c86

arch/xtensa/kernel/irq.c

+3 −19
Original line number Diff line number Diff line
@@ -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 */