RFR: 8321282: RISC-V: SpinPause() not implemented [v3]

[Fei Yang]

On Tue, 13 Feb 2024 13:28:26 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Hi, please consider.
>> 
>> Tested tier1 and targeted via gtest WaitBarrier which uses SpinPause(). (with UseZihintpause default true)
>
> Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review fix

Looks good. Thanks.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17820#pullrequestreview-1882090345