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cpu/hotplug: Remove CPU_STARTING and CPU_DYING notifier

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All users are converted to state machine, remove CPU_STARTING and the
corresponding CPU_DYING.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160818125731.27256-2-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner
2016-08-18 14:57:16 +02:00
parent 677f664653
commit ee1e714b94
5 changed files with 2 additions and 56 deletions
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30
kernel/cpu.c
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@@ -408,12 +408,6 @@ static int notify_online(unsigned int cpu)
return 0;
}
static int notify_starting(unsigned int cpu)
{
cpu_notify(CPU_STARTING, cpu);
return 0;
}
static int bringup_wait_for_ap(unsigned int cpu)
{
struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
@@ -759,12 +753,6 @@ static int notify_down_prepare(unsigned int cpu)
return err;
}
static int notify_dying(unsigned int cpu)
{
cpu_notify(CPU_DYING, cpu);
return 0;
}
/* Take this CPU down. */
static int take_cpu_down(void *_param)
{
@@ -823,7 +811,7 @@ static int takedown_cpu(unsigned int cpu)
BUG_ON(cpu_online(cpu));
/*
* The migration_call() CPU_DYING callback will have removed all
* The CPUHP_AP_SCHED_MIGRATE_DYING callback will have removed all
* runnable tasks from the cpu, there's only the idle task left now
* that the migration thread is done doing the stop_machine thing.
*
@@ -876,7 +864,6 @@ void cpuhp_report_idle_dead(void)
#define notify_down_prepare NULL
#define takedown_cpu NULL
#define notify_dead NULL
#define notify_dying NULL
#endif
#ifdef CONFIG_HOTPLUG_CPU
@@ -966,10 +953,9 @@ EXPORT_SYMBOL(cpu_down);
#endif /*CONFIG_HOTPLUG_CPU*/
/**
* notify_cpu_starting(cpu) - call the CPU_STARTING notifiers
* notify_cpu_starting(cpu) - Invoke the callbacks on the starting CPU
* @cpu: cpu that just started
*
* This function calls the cpu_chain notifiers with CPU_STARTING.
* It must be called by the arch code on the new cpu, before the new cpu
* enables interrupts and before the "boot" cpu returns from __cpu_up().
*/
@@ -1365,18 +1351,6 @@ static struct cpuhp_step cpuhp_ap_states[] = {
.startup.single = NULL,
.teardown.single = rcutree_dying_cpu,
},
/*
* Low level startup.single/teardown notifiers. Run with interrupts
* disabled. Will be removed once the notifiers are converted to
* states.
*/
[CPUHP_AP_NOTIFY_STARTING] = {
.name = "notify:starting",
.startup.single = notify_starting,
.teardown.single = notify_dying,
.skip_onerr = true,
.cant_stop = true,
},
/* Entry state on starting. Interrupts enabled from here on. Transient
* state for synchronsization */
[CPUHP_AP_ONLINE] = {