RFR: 8278411: Implement UseHeavyMonitors consistently, s390 port [v2]

Tue May 16 13:03:46 UTC 2023

On Tue, 16 May 2023 02:49:34 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

>> This PR make s390x to adapt the changes done in [JDK-8276901](https://bugs.openjdk.org/browse/JDK-8276901) OR implements UseHeavyMonitors. 
>> 
>> [JDK-8291555](https://bugs.openjdk.org/browse/JDK-8291555) still needs Porting effort. As for `LM_LIGHTWEIGHT` locking mode, code is Unimplemented.
>
> Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   suggestion from @TheRealMDoerr and @tstuefe

LGTM.

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

Marked as reviewed by lucy (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13978#pullrequestreview-1428526204