summaryrefslogtreecommitdiffstats
path: root/kernel/perf_event.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/perf_event.c')
-rw-r--r--kernel/perf_event.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 99b9700e74d..346dc0e35a0 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -315,7 +315,12 @@ static void perf_group_attach(struct perf_event *event)
{
struct perf_event *group_leader = event->group_leader;
- WARN_ON_ONCE(event->attach_state & PERF_ATTACH_GROUP);
+ /*
+ * We can have double attach due to group movement in perf_event_open.
+ */
+ if (event->attach_state & PERF_ATTACH_GROUP)
+ return;
+
event->attach_state |= PERF_ATTACH_GROUP;
if (group_leader == event)