RFR: 8326781: G1ConcurrentMark::top_at_rebuild_start() should take a HeapRegion* not an uint

[Albert Mingkun Yang]

On Tue, 27 Feb 2024 10:31:20 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   please review this refactoring to have `G1ConcurrentMark::top_at_rebuild_start` take a `HeapRegion*` instead of `uint` since all callers calculate the `uint` by calling `HeapRegion::hrm_index()` themselves in the argument.
> 
> Testing: gha, compilation
> 
> Thanks,
>   Thomas

Marked as reviewed by ayang (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/18024#pullrequestreview-1903630866