[ARM] 3728/1: Restore missing CPU Hotplug irq helper
Patch from Thomas Gleixner From: Thomas Gleixner <tglx@linutronix.de> The genirq conversion of ARM lost a CPU Hotplug helper function. Restore it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -167,6 +167,16 @@ void __init init_IRQ(void)
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#ifdef CONFIG_HOTPLUG_CPU
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static void route_irq(struct irqdesc *desc, unsigned int irq, unsigned int cpu)
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{
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pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->cpu, cpu);
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spin_lock_irq(&desc->lock);
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desc->chip->set_affinity(irq, cpumask_of_cpu(cpu));
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spin_unlock_irq(&desc->lock);
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}
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/*
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* The CPU has been marked offline. Migrate IRQs off this CPU. If
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* the affinity settings do not allow other CPUs, force them onto any
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