Quoting Alexandru Elisei (2020-06-17 04:38:50)
> diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
> index df352b334ea7..17e5952d21e4 100644
> --- a/drivers/perf/arm_pmu.c
> +++ b/drivers/perf/arm_pmu.c
> @@ -26,8 +26,46 @@
>
> #include <asm/irq_regs.h>
>
> +static int armpmu_count_irq_users(const int irq);
> +
> +struct pmu_irq_ops {
> + void (*enable_pmuirq)(unsigned int irq);
> + void (*disable_pmuirq)(unsigned int irq);
> + void (*free_pmuirq)(unsigned int irq, int cpu, void __percpu *devid);
Does 'cpu' need to be signed?
> +};
> +
> +static void armpmu_free_pmuirq(unsigned int irq, int cpu, void __percpu
> *devid)
> +{
> + free_irq(irq, per_cpu_ptr(devid, cpu));
> +}
> +
> +static const struct pmu_irq_ops pmuirq_ops = {
> + .enable_pmuirq = enable_irq,
> + .disable_pmuirq = disable_irq_nosync,
> + .free_pmuirq = armpmu_free_pmuirq
> +};
> +
> +static void armpmu_enable_percpu_pmuirq(unsigned int irq)
> +{
> + enable_percpu_irq(irq, IRQ_TYPE_NONE);
> +}
> +
> +static void armpmu_free_percpu_pmuirq(unsigned int irq, int cpu,
> + void __percpu *devid)
> +{
> + if (armpmu_count_irq_users(irq) == 1)
> + free_percpu_irq(irq, devid);
> +}
> +
> +static const struct pmu_irq_ops percpu_pmuirq_ops = {
> + .enable_pmuirq = armpmu_enable_percpu_pmuirq,
> + .disable_pmuirq = disable_percpu_irq,
> + .free_pmuirq = armpmu_free_percpu_pmuirq
> +};
> +
> static DEFINE_PER_CPU(struct arm_pmu *, cpu_armpmu);
> static DEFINE_PER_CPU(int, cpu_irq);
Same question as above.
> +static DEFINE_PER_CPU(const struct pmu_irq_ops *, cpu_irq_ops);
>
> static inline u64 arm_pmu_event_max_period(struct perf_event *event)
> {
