RFR: 8253843: AArch64: Use ishst for storestore barrier

[Alan Hayward]

On Wed, 30 Sep 2020 10:05:58 GMT, Alan Hayward <github.com+4146708+a74nh at openjdk.org> wrote:

>>> /signed
>> 
>> this was a mistake. Meant to do /covered
>
> There doesn't seem to be an AArch64-port label. Is there any way to get AArch64 patches posted to the AArch64-port-dev
> mailing list?

I'm also getting CI failures unrelated to this patch, due to disks being full:
https://github.com/a74nh/jdk/actions/runs/280072223

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PR: https://git.openjdk.java.net/jdk/pull/427