tsan: simple memory profiler

llvm-svn: 157248
diff --git a/compiler-rt/lib/tsan/rtl/tsan_mutex.cc b/compiler-rt/lib/tsan/rtl/tsan_mutex.cc
index a343a8b..e95b195 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_mutex.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_mutex.cc
@@ -163,7 +163,7 @@
     if (iter_++ < kActiveSpinIters)
       proc_yield(kActiveSpinCnt);
     else
-      sched_yield();
+      internal_yield();
     return true;
   }