v4.19.13 snapshot.
diff --git a/tools/lib/lockdep/tests/common.h b/tools/lib/lockdep/tests/common.h
new file mode 100644
index 0000000..3026c29
--- /dev/null
+++ b/tools/lib/lockdep/tests/common.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LIBLOCKDEP_TEST_COMMON_H
+#define _LIBLOCKDEP_TEST_COMMON_H
+
+#define LOCK_UNLOCK_2(a, b) \
+ do { \
+ pthread_mutex_lock(&(a)); \
+ pthread_mutex_lock(&(b)); \
+ pthread_mutex_unlock(&(b)); \
+ pthread_mutex_unlock(&(a)); \
+ } while(0)
+
+#endif