RFR: 8335217: Fix memory ordering in ClassLoaderData::ChunkedHandleList [v3]

[Zhengyu Gu]

> ClassLoaderData::ChunkedHandleList's head is installed via Atomic::release_store(). Therefore, readers need Atomic::Atomic::load_acquire() barrier to access its members safely.

Zhengyu Gu has updated the pull request incrementally with one additional commit since the last revision:

  Revert some of previous changes

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/19919/files
  - new: https://git.openjdk.org/jdk/pull/19919/files/9b01ab0f..63189b1d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19919&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19919&range=01-02

  Stats: 6 lines in 1 file changed: 0 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/19919.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19919/head:pull/19919

PR: https://git.openjdk.org/jdk/pull/19919