Integrated: Merge jdk20

On Wed, 4 Jan 2023 14:25:12 GMT, Jesper Wilhelmsson wrote: > Forwardport JDK 20 -> JDK 21 This pull request has now been integrated. Changeset: df1caf90 Author:Jesper Wilhelmsson URL: https://git.openjdk.org/jdk/commit/df1caf90818558b897a6b8ab80757f2a03398c55 Stats: 299 lines i

RFR: Merge jdk20

Forwardport JDK 20 -> JDK 21 - Commit messages: - Merge remote-tracking branch 'jdk20/master' into Merge_jdk20 - 8299476: PPC64 Zero build fails after JDK-8286302 - 8293824: gc/whitebox/TestConcMarkCycleWB.java failed "RuntimeException: assertTrue: expected true, was false" - 829