RFR: 8299853: Serial: Use more concrete type for TenuredGeneration::_the_space [v2]

[Albert Mingkun Yang]

On Tue, 10 Jan 2023 12:57:18 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Simple change of using the actual type for a field.
>> 
>> Test: hotspot_gc
>
> 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: https://git.openjdk.org/jdk/pull/11925