RFR: 8373208: Make Atomic class template constant initializable [v2]

[Kim Barrett]

On Mon, 15 Dec 2025 08:22:18 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Kim Barrett 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 constinit-atomic
>>  - constexpr Atomc ctors
>
> Marked as reviewed by stefank (Reviewer).

Thanks for reviews @stefank and @dholmes-ora

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PR Comment: https://git.openjdk.org/jdk/pull/28711#issuecomment-3672788873