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-rw-r--r--kernel/perf_event.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index b22a2ef75c8..ad02feadb6b 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -6115,17 +6115,20 @@ __perf_event_exit_task(struct perf_event *child_event,
struct perf_event_context *child_ctx,
struct task_struct *child)
{
- struct perf_event *parent_event;
+ if (child_event->parent) {
+ raw_spin_lock_irq(&child_ctx->lock);
+ perf_group_detach(child_event);
+ raw_spin_unlock_irq(&child_ctx->lock);
+ }
perf_event_remove_from_context(child_event);
- parent_event = child_event->parent;
/*
- * It can happen that parent exits first, and has events
+ * It can happen that the parent exits first, and has events
* that are still around due to the child reference. These
- * events need to be zapped - but otherwise linger.
+ * events need to be zapped.
*/
- if (parent_event) {
+ if (child_event->parent) {
sync_child_event(child_event, child);
free_event(child_event);
}