Index: lib/Support/Mutex.cpp
===================================================================
--- lib/Support/Mutex.cpp	(revision 126943)
+++ lib/Support/Mutex.cpp	(working copy)
@@ -25,9 +25,9 @@ namespace llvm {
 using namespace sys;
 MutexImpl::MutexImpl( bool recursive) { }
 MutexImpl::~MutexImpl() { }
-bool MutexImpl::acquire() { return true; }
-bool MutexImpl::release() { return true; }
-bool MutexImpl::tryacquire() { return true; }
+bool MutexImpl::acquire() { return false; }
+bool MutexImpl::release() { return false; }
+bool MutexImpl::tryacquire() { return false; }
 }
 #else
 
