ARM: 7586/1: sp804: set cpumask to cpu_possible_mask for clock event device
The SP804 driver statically initialises the cpumask of the clock event device to be cpu_all_mask, which is derived from the compile-time constant NR_CPUS. This breaks SMP_ON_UP systems where the interrupt controller handling the sp804 doesn't have the irq_set_affinity callback on the irq_chip, because the common timer code fails to identify the device as cpu-local and ends up treating it as a broadcast device instead. This patch fixes the problem by using cpu_possible_mask at runtime, which will correctly represent the possible CPUs when SMP_ON_UP is being used. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -162,7 +162,6 @@ static struct clock_event_device sp804_clockevent = {
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.set_mode = sp804_set_mode,
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.set_next_event = sp804_set_next_event,
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.rating = 300,
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.cpumask = cpu_all_mask,
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};
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static struct irqaction sp804_timer_irq = {
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@ -185,6 +184,7 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int irq,
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clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
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evt->name = name;
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evt->irq = irq;
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evt->cpumask = cpu_possible_mask;
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setup_irq(irq, &sp804_timer_irq);
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clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);
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