genirq/timings: Add infrastructure to track the interrupt timings

[mirror_ubuntu-bionic-kernel.git] / kernel / irq / timings.c

/*
 * linux/kernel/irq/timings.c
 *
 * Copyright (C) 2016, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */
#include <linux/percpu.h>
#include <linux/static_key.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

#include "internals.h"

DEFINE_STATIC_KEY_FALSE(irq_timing_enabled);

DEFINE_PER_CPU(struct irq_timings, irq_timings);

void irq_timings_enable(void)
{
	static_branch_enable(&irq_timing_enabled);
}

void irq_timings_disable(void)
{
	static_branch_disable(&irq_timing_enabled);
}