git: openjdk/jdk: 8264788: Make SequentialSubTasksDone use-once

[Thomas Schatzl]

Changeset: 125a8479
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2021-04-15 08:11:01 +0000
URL:       https://git.openjdk.java.net/jdk/commit/125a8479

8264788: Make SequentialSubTasksDone use-once

Reviewed-by: ayang, sjohanss

! src/hotspot/share/gc/parallel/psParallelCompact.cpp
! src/hotspot/share/gc/parallel/psScavenge.cpp
! src/hotspot/share/gc/shared/preservedMarks.cpp
! src/hotspot/share/gc/shared/workgroup.cpp
! src/hotspot/share/gc/shared/workgroup.hpp