[PATCH v2 1/4] perf: Simplify group_sched_out()

From: Peter Zijlstra
Date: Thu Oct 29 2020 - 12:35:50 EST


Since event_sched_out() clears cpuctx->exclusive upon removal of an
exclusive event (and only group leaders can be exclusive), there is no
point in group_sched_out() trying to do it too. It is impossible for
cpuctx->exclusive to still be set here.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
kernel/events/core.c | 3 ---
1 file changed, 3 deletions(-)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2312,9 +2312,6 @@ group_sched_out(struct perf_event *group
event_sched_out(event, cpuctx, ctx);

perf_pmu_enable(ctx->pmu);
-
- if (group_event->attr.exclusive)
- cpuctx->exclusive = 0;
}

#define DETACH_GROUP 0x01UL