git: openjdk/jdk: 8265012: Shenandoah: Backout JDK-8264718

[Zhengyu Gu]

Changeset: 125184e9
Author:    Zhengyu Gu <zgu at openjdk.org>
Date:      2021-04-12 12:47:40 +0000
URL:       https://git.openjdk.java.net/jdk/commit/125184e9

8265012: Shenandoah: Backout JDK-8264718

Reviewed-by: shade

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/hotspot/share/gc/shenandoah/shenandoahMark.cpp
! src/hotspot/share/gc/shenandoah/shenandoahMark.hpp
! src/hotspot/share/gc/shenandoah/shenandoahMark.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahSTWMark.cpp