perf: Do not set task_ctx pointer in cpuctx if there are no events in the context

[karo-tx-linux.git] / kernel / events / core.c

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 0e8457da6f9551c3eae667a6ac09a735a341b4bf..b0c1186fd97bcdaed7e8cdb537d9a61740bb86f3 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2173,7 +2173,8 @@ static void perf_event_context_sched_in(struct perf_event_context *ctx,
 
        perf_event_sched_in(cpuctx, ctx, task);
 
-       cpuctx->task_ctx = ctx;
+       if (ctx->nr_events)
+               cpuctx->task_ctx = ctx;
 
        perf_pmu_enable(ctx->pmu);
        perf_ctx_unlock(cpuctx, ctx);