RFR: 8356556: AArch64: No need for acquire fence in safepoint poll in FFM

[Samuel Chee]

On Tue, 13 May 2025 12:53:56 GMT, Samuel Chee <duke at openjdk.org> wrote:

> Removes the unnecessary acquire to reduce memory ordering requirement since it is not longer needed as threads always disarm their own poll value.

Waiting for OCA approval!!!

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PR Comment: https://git.openjdk.org/jdk/pull/25211#issuecomment-2963222244