RFR: 8304412: Serial: Refactor old generation cards update after Full GC [v3]

[Albert Mingkun Yang]

On Sun, 26 Mar 2023 17:27:17 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple refactoring to use more informative names/comments.
>> 
>> Test: tier1-6
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Thanks for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/13076#issuecomment-1486345472