--- a/src/hotspot/share/c1/c1_LIRAssembler.cpp	Wed Oct 03 11:43:39 2018 +0530
+++ b/src/hotspot/share/c1/c1_LIRAssembler.cpp	Wed Oct 03 03:41:57 2018 -0400
@@ -446,10 +446,8 @@
 void LIR_Assembler::emit_call(LIR_OpJavaCall* op) {
   verify_oop_map(op->info());
 
-  if (os::is_MP()) {
-    // must align calls sites, otherwise they can't be updated atomically on MP hardware
-    align_call(op->code());
-  }
+  // must align calls sites, otherwise they can't be updated atomically
+  align_call(op->code());
 
   // emit the static call stub stuff out of line
   emit_static_call_stub();