Mark the PMU interrupts as non-threadable, as is the case with
arch/arm: 
d9c3365 ARM: 7813/1: Mark pmu interupt IRQF_NO_THREAD
Acked-by: Will Deacon <will.deacon@arm.com>
Suggested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
                        }
 
                        err = request_irq(irq, armpmu->handle_irq,
-                                       IRQF_NOBALANCING,
+                                       IRQF_NOBALANCING | IRQF_NO_THREAD,
                                        "arm-pmu", armpmu);
                        if (err) {
                                pr_err("unable to request IRQ%d for ARM PMU counters\n",