mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
00c1d17aab
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153336.130385842@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
40 lines
1 KiB
C
40 lines
1 KiB
C
/*
|
|
* linux/drivers/clocksource/dummy_timer.c
|
|
*
|
|
* Copyright (C) 2013 ARM Ltd.
|
|
* All Rights Reserved
|
|
*
|
|
* 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/clockchips.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/init.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/cpumask.h>
|
|
|
|
static DEFINE_PER_CPU(struct clock_event_device, dummy_timer_evt);
|
|
|
|
static int dummy_timer_starting_cpu(unsigned int cpu)
|
|
{
|
|
struct clock_event_device *evt = per_cpu_ptr(&dummy_timer_evt, cpu);
|
|
|
|
evt->name = "dummy_timer";
|
|
evt->features = CLOCK_EVT_FEAT_PERIODIC |
|
|
CLOCK_EVT_FEAT_ONESHOT |
|
|
CLOCK_EVT_FEAT_DUMMY;
|
|
evt->rating = 100;
|
|
evt->cpumask = cpumask_of(cpu);
|
|
|
|
clockevents_register_device(evt);
|
|
return 0;
|
|
}
|
|
|
|
static int __init dummy_timer_register(void)
|
|
{
|
|
return cpuhp_setup_state(CPUHP_AP_DUMMY_TIMER_STARTING,
|
|
"AP_DUMMY_TIMER_STARTING",
|
|
dummy_timer_starting_cpu, NULL);
|
|
}
|
|
early_initcall(dummy_timer_register);
|