Add session active test

[lttng-modules.git] / ltt-events.c

diff --git a/ltt-events.c b/ltt-events.c
index c2a6a9206304f6e5a06b4b30e55a465d0f70f589..947d772cf37bec3c1a6b1d2557e2aeb2f19dd904 100644 (file)
--- a/ltt-events.c
+++ b/ltt-events.c
@@ -49,7 +49,7 @@ void ltt_session_destroy(struct ltt_session *session)
        int ret;
 
        mutex_lock(&sessions_mutex);
-       session->active = 0;
+       ACCESS_ONCE(session->active) = 0;
        list_for_each_entry(event, &session->events, list) {
                ret = _ltt_event_unregister(event);
                WARN_ON(ret);
@@ -73,7 +73,7 @@ int ltt_session_start(struct ltt_session *session)
                ret = -EBUSY;
                goto end;
        }
-       session->active = 1;
+       ACCESS_ONCE(session->active) = 1;
        synchronize_trace();    /* Wait for in-flight events to complete */
 end:
        mutex_unlock(&sessions_mutex);
@@ -89,7 +89,7 @@ int ltt_session_stop(struct ltt_session *session)
                ret = -EBUSY;
                goto end;
        }
-       session->active = 0;
+       ACCESS_ONCE(session->active) = 0;
        synchronize_trace();    /* Wait for in-flight events to complete */
 end:
        mutex_unlock(&sessions_mutex);