RFR: 8310675: Fix -Wconversion warnings in ZGC code [v2]

[Joel Sikström]

On Tue, 6 Aug 2024 14:26:17 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Joel Sikström has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
>> 
>>  - Merge branch 'master' into JDK-8310675
>>  - 8310675: Fixed -Wconversion warnings in ZGC
>
> Marked as reviewed by ayang (Reviewer).

Thank you for reviews! @albertnetymk @stefank

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PR Comment: https://git.openjdk.org/jdk/pull/20406#issuecomment-2273541083