diff --git a/[refs] b/[refs]
index 7c80dcd32b6e..9beb978dea7b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 07a267cdd2fd7d1de9455b1e36a1635ace7276c7
+refs/heads/master: d15f57f23eaba975309a153b23699cd0c0236974
diff --git a/trunk/kernel/trace/trace.c b/trunk/kernel/trace/trace.c
index 3009aafa4dde..ea11f4ebfae1 100644
--- a/trunk/kernel/trace/trace.c
+++ b/trunk/kernel/trace/trace.c
@@ -964,8 +964,10 @@ static void *s_start(struct seq_file *m, loff_t *pos)
 
 	mutex_lock(&trace_types_lock);
 
-	if (!current_trace || current_trace != iter->trace)
+	if (!current_trace || current_trace != iter->trace) {
+		mutex_unlock(&trace_types_lock);
 		return NULL;
+	}
 
 	atomic_inc(&trace_record_cmdline_disabled);