hg: shenandoah/jdk10/hotspot: Make sure atomic operations are done on "volatile" fields

[ashipile at redhat.com]

Changeset: 042729cf41e7
Author:    shade
Date:      2017-07-11 22:35 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/hotspot/rev/042729cf41e7

Make sure atomic operations are done on "volatile" fields

! src/share/vm/gc/shared/parallelCleaning.hpp
! src/share/vm/gc/shenandoah/shenandoahCodeRoots.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.hpp
! src/share/vm/gc/shenandoah/shenandoahVerifier.cpp