diff --git a/scripts/coccinelle/bool_function.cocci b/scripts/coccinelle/bool_function.cocci
new file mode 100644
index 0000000000..0328ecfbbe
--- /dev/null
+++ b/scripts/coccinelle/bool_function.cocci
@@ -0,0 +1,21 @@
+@@
+identifier fn;
+typedef bool;
+symbol false;
+symbol true;
+@@
+
+bool fn ( ... )
+{
+<...
+return
+(
+- 0
++ false
+|
+- 1
++ true
+)
+  ;
+...>
+}