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authorThomas Gleixner <tglx@linutronix.de>2016-08-18 14:57:16 +0200
committerThomas Gleixner <tglx@linutronix.de>2016-09-06 18:30:19 +0200
commitee1e714b94521b0bb27b04dfd1728ec51b19d4f0 (patch)
tree3e44c2b16f45998eae6ad3f935df22929741df31 /kernel/cpu.c
parent677f6646533d701c8609b8bcb9304173c11cc194 (diff)
downloadlinux-ee1e714b94521b0bb27b04dfd1728ec51b19d4f0.tar.bz2
cpu/hotplug: Remove CPU_STARTING and CPU_DYING notifier
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>
Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c30
1 files changed, 2 insertions, 28 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 32eef273a0b9..d14ae4438e8e 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -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] = {