RFR: 8324970: Serial: Refactor signature of maintain_old_to_young_invariant [v2]

[Albert Mingkun Yang]

On Wed, 31 Jan 2024 10:46:12 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Trivial type-change in signature.
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Thanks for review.

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PR Comment: https://git.openjdk.org/jdk/pull/17631#issuecomment-1919034524