Re: [PATCH 1/2] arm64: Mark PMU interrupt IRQF_NO_THREAD

From: Will Deacon
Date: Thu Apr 23 2015 - 06:46:33 EST


On Tue, Apr 21, 2015 at 04:05:54PM +0100, Anders Roxell wrote:
> Mark the PMU interrupts as non-threadable, as is the case with
> arch/arm: d9c3365 ARM: 7813/1: Mark pmu interupt IRQF_NO_THREAD
>
> Suggested-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Signed-off-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
> ---
> arch/arm64/kernel/perf_event.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Will Deacon <will.deacon@xxxxxxx>

Catalin can queue this for 4.2.

Cheers,

Will

> diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
> index 195991d..7db5c84 100644
> --- a/arch/arm64/kernel/perf_event.c
> +++ b/arch/arm64/kernel/perf_event.c
> @@ -488,7 +488,7 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu)
> }
>
> 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",
> --
> 2.1.4
>
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