RFR: 8287437: Temporarily disable Continuations::enabled() for platforms which don't have an implementation, yet [v2]

[Aleksey Shipilev]

On Fri, 27 May 2022 13:20:39 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> Hello,
>> 
>> I'd like to disable `Continuations::enabled()` for platforms, which don't support Loom, yet. This enables working on Panama which is also controlled by `--enable-preview`.
>> 
>> I'm proposing this for all platforms which have an unresolved porting issue here:
>> [JDK-8284161](https://bugs.openjdk.java.net/browse/JDK-8284161)
>> 
>> Please review and provide feedback if this makes sense for your platform.
>
> Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Invert check: Platforms which do support Loom

Looks fine to me. I tested x86_64 and AArch64 with `jdk_loom hotspot_loom`, and they pass.

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Marked as reviewed by shade (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8919