git: openjdk/jdk: 8256516: Simplify clearing References

[Kim Barrett]

Changeset: 675d1d56
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2020-11-19 15:42:46 +0000
URL:       https://github.com/openjdk/jdk/commit/675d1d56

8256516: Simplify clearing References

Provide and use explicit referent clearing instead of set to null.

Reviewed-by: rkennke, shade, pliden, mchung

! src/hotspot/share/classfile/javaClasses.hpp
! src/hotspot/share/classfile/javaClasses.inline.hpp
! src/hotspot/share/gc/shared/referenceProcessor.cpp
! src/hotspot/share/gc/shared/referenceProcessor.hpp
! src/hotspot/share/gc/shared/referenceProcessor.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahReferenceProcessor.cpp
! src/hotspot/share/gc/z/zReferenceProcessor.cpp