[jdk25u-dev] RFR: 8372835: WorkQueue::push is missing an acquire-fence

[Aleksey Shipilev]

This one is a little weird process-wise. There is `25.0.3-oracle` fix for it already, but no mainline fix (yet). Mainline would get it via [JDK-8375130](https://bugs.openjdk.org/browse/JDK-8375130). I think it is easier to "backport" this change instead of partially pick up JDK-8375130. This also addresses parity more thoroughly. There is no significant correctness risk here, as we "only" add a new barrier. Might have performance implications, but correctness trumps it.

Additional testing:
 - [x] Linux x86_64 server fastdebug, `java/util/concurrent`

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Commit messages:
 - 8372835: WorkQueue::push is missing an acquire-fence

Changes: https://git.openjdk.org/jdk25u-dev/pull/141/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u-dev&pr=141&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372835
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk25u-dev/pull/141.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u-dev.git pull/141/head:pull/141

PR: https://git.openjdk.org/jdk25u-dev/pull/141