Messages in this thread | | | Date | Fri, 8 Jan 2021 10:46:17 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH 2/2] thermal: Move therm_throt there from x86/mce |
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On Fri, Jan 08, 2021 at 09:54:30AM +0100, Borislav Petkov wrote: > +#ifdef CONFIG_X86_THERMAL_VECTOR > +static void unexpected_thermal_interrupt(void) > +{ > + pr_err("CPU%d: Unexpected LVT thermal interrupt!\n", > + smp_processor_id()); > +} > + > +static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt; > + > +void thermal_set_handler(void (*handler)(void)) > +{ > + if (handler) { WARN_ON(smp_thermal_vector != unexpected_thermal_interrupt); > + smp_thermal_vector = handler; > + } else > + smp_thermal_vector = unexpected_thermal_interrupt; > +} > +EXPORT_SYMBOL_GPL(thermal_set_handler);
You really don't want multiple modules to touch that at the same time.
> +DEFINE_IDTENTRY_SYSVEC(sysvec_thermal) > +{ > + trace_thermal_apic_entry(THERMAL_APIC_VECTOR); > + inc_irq_stat(irq_thermal_count); > + smp_thermal_vector(); > + trace_thermal_apic_exit(THERMAL_APIC_VECTOR); > + ack_APIC_irq(); > +} > +#endif
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