diff options
Diffstat (limited to 'kernel/perf_event.c')
-rw-r--r-- | kernel/perf_event.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 1f98c78c3343..7e3bcf1a29f0 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c | |||
@@ -2917,6 +2917,7 @@ static void perf_output_get_handle(struct perf_output_handle *handle) | |||
2917 | 2917 | ||
2918 | preempt_disable(); | 2918 | preempt_disable(); |
2919 | local_inc(&data->nest); | 2919 | local_inc(&data->nest); |
2920 | handle->wakeup = local_read(&data->wakeup); | ||
2920 | } | 2921 | } |
2921 | 2922 | ||
2922 | static void perf_output_put_handle(struct perf_output_handle *handle) | 2923 | static void perf_output_put_handle(struct perf_output_handle *handle) |
@@ -2950,7 +2951,7 @@ again: | |||
2950 | goto again; | 2951 | goto again; |
2951 | } | 2952 | } |
2952 | 2953 | ||
2953 | if (local_xchg(&data->wakeup, 0)) | 2954 | if (handle->wakeup != local_read(&data->wakeup)) |
2954 | perf_output_wakeup(handle); | 2955 | perf_output_wakeup(handle); |
2955 | 2956 | ||
2956 | preempt_enable(); | 2957 | preempt_enable(); |