1 files changed, 39 insertions, 0 deletions
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c
new file mode 100644
index 000000000000..11ba5bb4ed0a
--- /dev/null
+++ b/kernel/trace/trace_event_profile.c
@@ -0,0 +1,39 @@
+/*
+ * trace event based perf counter profiling
+ *
+ * Copyright (C) 2009 Red Hat Inc, Peter Zijlstra <pzijlstr@redhat.com>
+ *
+ */
+
+#include "trace.h"
+
+int ftrace_profile_enable(int event_id)
+{
+	struct ftrace_event_call *event;
+	int ret = -EINVAL;
+
+	mutex_lock(&event_mutex);
+	list_for_each_entry(event, &ftrace_events, list) {
+		if (event->id == event_id && event->profile_enable) {
+			ret = event->profile_enable(event);
+			break;
+		}
+	}
+	mutex_unlock(&event_mutex);
+
+	return ret;
+}
+
+void ftrace_profile_disable(int event_id)
+{
+	struct ftrace_event_call *event;
+
+	mutex_lock(&event_mutex);
+	list_for_each_entry(event, &ftrace_events, list) {
+		if (event->id == event_id) {
+			event->profile_disable(event);
+			break;
+		}
+	}
+	mutex_unlock(&event_mutex);
+}