Index: llvm/lib/Support/ManagedStatic.cpp
===================================================================
--- llvm/lib/Support/ManagedStatic.cpp
+++ llvm/lib/Support/ManagedStatic.cpp
@@ -18,16 +18,10 @@
 using namespace llvm;
 
 static const ManagedStaticBase *StaticList = nullptr;
-static std::recursive_mutex *ManagedStaticMutex = nullptr;
-static llvm::once_flag mutex_init_flag;
-
-static void initializeMutex() {
-  ManagedStaticMutex = new std::recursive_mutex();
-}
 
 static std::recursive_mutex *getManagedStaticMutex() {
-  llvm::call_once(mutex_init_flag, initializeMutex);
-  return ManagedStaticMutex;
+  static std::recursive_mutex m;
+  return &m;
 }
 
 void ManagedStaticBase::RegisterManagedStatic(void *(*Creator)(),