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-rw-r--r--kernel/events/core.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index dcb093e7b377..dfb1d951789e 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9431,9 +9431,7 @@ static void free_pmu_context(struct pmu *pmu)
if (pmu->task_ctx_nr > perf_invalid_context)
return;
- mutex_lock(&pmus_lock);
free_percpu(pmu->pmu_cpu_context);
- mutex_unlock(&pmus_lock);
}
/*
@@ -9689,12 +9687,8 @@ EXPORT_SYMBOL_GPL(perf_pmu_register);
void perf_pmu_unregister(struct pmu *pmu)
{
- int remove_device;
-
mutex_lock(&pmus_lock);
- remove_device = pmu_bus_running;
list_del_rcu(&pmu->entry);
- mutex_unlock(&pmus_lock);
/*
* We dereference the pmu list under both SRCU and regular RCU, so
@@ -9706,13 +9700,14 @@ void perf_pmu_unregister(struct pmu *pmu)
free_percpu(pmu->pmu_disable_count);
if (pmu->type >= PERF_TYPE_MAX)
idr_remove(&pmu_idr, pmu->type);
- if (remove_device) {
+ if (pmu_bus_running) {
if (pmu->nr_addr_filters)
device_remove_file(pmu->dev, &dev_attr_nr_addr_filters);
device_del(pmu->dev);
put_device(pmu->dev);
}
free_pmu_context(pmu);
+ mutex_unlock(&pmus_lock);
}
EXPORT_SYMBOL_GPL(perf_pmu_unregister);