diff options
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 94bbe4695232..3ba480f598a2 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -23,6 +23,8 @@ #include <linux/tick.h> #include <trace/events/power.h> +#include <trace/events/sched.h> + #include "smpboot.h" #ifdef CONFIG_SMP @@ -428,6 +430,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) out_release: cpu_hotplug_done(); + trace_sched_cpu_hotplug(cpu, err, 0); if (!err) cpu_notify_nofail(CPU_POST_DEAD | mod, hcpu); return err; @@ -531,6 +534,7 @@ out_notify: __cpu_notify(CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL); out: cpu_hotplug_done(); + trace_sched_cpu_hotplug(cpu, ret, 1); return ret; } @@ -823,3 +827,23 @@ void init_cpu_online(const struct cpumask *src) { cpumask_copy(to_cpumask(cpu_online_bits), src); } + +static ATOMIC_NOTIFIER_HEAD(idle_notifier); + +void idle_notifier_register(struct notifier_block *n) +{ + atomic_notifier_chain_register(&idle_notifier, n); +} +EXPORT_SYMBOL_GPL(idle_notifier_register); + +void idle_notifier_unregister(struct notifier_block *n) +{ + atomic_notifier_chain_unregister(&idle_notifier, n); +} +EXPORT_SYMBOL_GPL(idle_notifier_unregister); + +void idle_notifier_call_chain(unsigned long val) +{ + atomic_notifier_call_chain(&idle_notifier, val, NULL); +} +EXPORT_SYMBOL_GPL(idle_notifier_call_chain); |