[jdk20u] RFR: 8307104: [AIX] VM crashes with UseRTMLocking on Power10

[Paul Hohensee]

On Thu, 11 May 2023 17:33:05 GMT, Tyler Steele <tsteele at openjdk.org> wrote:

> Prevent crashes on platforms that don't support transnational memory instructions.
> 
> I encountered conflicts with the header file years while making this change. No conflicts with functionality. Essentially a clean backport, but I will wait for a review before proceeding.

Copyright dates differences are considered clean. Lgtm.

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Marked as reviewed by phh (Reviewer).

PR Review: https://git.openjdk.org/jdk20u/pull/77#pullrequestreview-1424750855