1 files changed, 15 insertions, 0 deletions
diff --git a/libgo/go/sync/runtime2.go b/libgo/go/sync/runtime2.go
new file mode 100644
index 00000000000..931edad9f1c
--- /dev/null
+++ b/libgo/go/sync/runtime2.go
@@ -0,0 +1,15 @@
+// +build !goexperiment.staticlockranking
+
+package sync
+
+import "unsafe"
+
+// Approximation of notifyList in runtime/sema.go. Size and alignment must
+// agree.
+type notifyList struct {
+	wait   uint32
+	notify uint32
+	lock   uintptr // key field of the mutex
+	head   unsafe.Pointer
+	tail   unsafe.Pointer
+}