RFR: 8308479: [s390x] Implement alternative fast-locking scheme [v3]

[Amit Kumar]

On Wed, 14 Jun 2023 15:47:30 GMT, Lutz Schmidt <lucy at openjdk.org> wrote:

>> Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   restore currentHeader after z_nill
>
> There are some comments you may want to consider.

Hi @RealLucy,

Please check benchmark result in description.

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PR Comment: https://git.openjdk.org/jdk/pull/14414#issuecomment-1601977355