---

yaml --- r: 182294 b: refs/heads/master c: 24a5365 h: refs/heads/master v: v3
git-mirror · Jan 17, 2010 · 2643474 · 2643474
1 parent fd4798c
commit 2643474
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Showing 2 changed files with 11 additions and 10 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d931369b74b3d6f2044f595af6f3dd074f65d9cf
+refs/heads/master: 24a53652e361321b09df5040711e69387344ce09
diff --git a/trunk/kernel/trace/trace_functions_graph.c b/trunk/kernel/trace/trace_functions_graph.c
@@ -212,9 +212,6 @@ int trace_graph_entry(struct ftrace_graph_ent *trace)
 	int cpu;
 	int pc;
 
-	if (unlikely(!tr))
-		return 0;
-
 	if (!ftrace_trace_task(current))
 		return 0;
 
@@ -287,11 +284,20 @@ void trace_graph_return(struct ftrace_graph_ret *trace)
 	local_irq_restore(flags);
 }
 
+void set_graph_array(struct trace_array *tr)
+{
+	graph_array = tr;
+
+	/* Make graph_array visible before we start tracing */
+
+	smp_mb();
+}
+
 static int graph_trace_init(struct trace_array *tr)
 {
 	int ret;
 
-	graph_array = tr;
+	set_graph_array(tr);
 	ret = register_ftrace_graph(&trace_graph_return,
 				    &trace_graph_entry);
 	if (ret)
@@ -301,11 +307,6 @@ static int graph_trace_init(struct trace_array *tr)
 	return 0;
 }
 
-void set_graph_array(struct trace_array *tr)
-{
-	graph_array = tr;
-}
-
 static void graph_trace_reset(struct trace_array *tr)
 {
 	tracing_stop_cmdline_record();