ARC: intc: Document arc_request_percpu_irq() better
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>steinar/wifi_calib_4_9_kernel
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c6317bc7c5
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c512c6ba7a
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@ -51,6 +51,18 @@ void arch_do_IRQ(unsigned int irq, struct pt_regs *regs)
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set_irq_regs(old_regs);
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set_irq_regs(old_regs);
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}
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}
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/*
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* API called for requesting percpu interrupts - called by each CPU
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* - For boot CPU, actually request the IRQ with genirq core + enables
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* - For subsequent callers only enable called locally
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*
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* Relies on being called by boot cpu first (i.e. request called ahead) of
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* any enable as expected by genirq. Hence Suitable only for TIMER, IPI
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* which are guaranteed to be setup on boot core first.
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* Late probed peripherals such as perf can't use this as there no guarantee
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* of being called on boot CPU first.
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*/
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void arc_request_percpu_irq(int irq, int cpu,
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void arc_request_percpu_irq(int irq, int cpu,
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irqreturn_t (*isr)(int irq, void *dev),
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irqreturn_t (*isr)(int irq, void *dev),
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const char *irq_nm,
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const char *irq_nm,
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