+static void perf_pm_resume_cpu(void *unused)
+{
+ struct perf_cpu_context *cpuctx;
+ struct perf_event_context *ctx;
+ struct pmu *pmu;
+ int idx;
+
+ idx = srcu_read_lock(&pmus_srcu);
+ list_for_each_entry_rcu(pmu, &pmus, entry) {
+ cpuctx = this_cpu_ptr(pmu->pmu_cpu_context);
+ ctx = cpuctx->task_ctx;
+
+ perf_ctx_lock(cpuctx, ctx);
+ perf_pmu_disable(cpuctx->ctx.pmu);
+
+ cpu_ctx_sched_out(cpuctx, EVENT_ALL);
+ if (ctx)
+ ctx_sched_out(ctx, cpuctx, EVENT_ALL);
+
+ perf_pmu_enable(cpuctx->ctx.pmu);
+ perf_ctx_unlock(cpuctx, ctx);
+ }
+ srcu_read_unlock(&pmus_srcu, idx);
+}
+
+static void perf_pm_suspend_cpu(void *unused)
+{
+ struct perf_cpu_context *cpuctx;
+ struct perf_event_context *ctx;
+ struct pmu *pmu;
+ int idx;
+
+ idx = srcu_read_lock(&pmus_srcu);
+ list_for_each_entry_rcu(pmu, &pmus, entry) {
+ cpuctx = this_cpu_ptr(pmu->pmu_cpu_context);
+ ctx = cpuctx->task_ctx;
+
+ perf_ctx_lock(cpuctx, ctx);
+ perf_pmu_disable(cpuctx->ctx.pmu);
+
+ perf_event_sched_in(cpuctx, ctx, current);
+
+ perf_pmu_enable(cpuctx->ctx.pmu);
+ perf_ctx_unlock(cpuctx, ctx);
+ }
+ srcu_read_unlock(&pmus_srcu, idx);
+}
+
+static int perf_resume(void)
+{
+ get_online_cpus();
+ smp_call_function(perf_pm_resume_cpu, NULL, 1);
+ put_online_cpus();
+
+ return NOTIFY_OK;
+}
+
+static int perf_suspend(void)
+{
+ get_online_cpus();
+ smp_call_function(perf_pm_suspend_cpu, NULL, 1);
+ put_online_cpus();
+
+ return NOTIFY_OK;
+}
+
+static int perf_pm(struct notifier_block *self, unsigned long action, void *ptr)
+{
+ switch (action) {
+ case PM_POST_HIBERNATION:
+ case PM_POST_SUSPEND:
+ return perf_resume();
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ return perf_suspend();
+ default:
+ return NOTIFY_DONE;
+ }
+}
+
+static struct notifier_block perf_pm_notifier = {
+ .notifier_call = perf_pm,
+};
+