hg: jdk9/hs/hotspot: 8165857: CMS _overflow_list is missing volatile specifiers.

[kim.barrett at oracle.com]

Changeset: f1ad14991f86
Author:    eosterlund
Date:      2016-09-27 16:43 -0400
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/f1ad14991f86

8165857: CMS _overflow_list is missing volatile specifiers.
Summary: Change _overflow_list from "oop" to "oopDesc* volatile", both CMS and ParNew.
Reviewed-by: kbarrett, tschatzl

! src/share/vm/gc/cms/concurrentMarkSweepGeneration.hpp
! src/share/vm/gc/cms/parNewGeneration.hpp