RFR: 8339771: RISC-V: Reduce icache flushes [v2]

[Robbin Ehn]

On Thu, 19 Sep 2024 08:14:50 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Code would in BarrierSetNMethod::set_guard_value(...)
>
> I see. Seems deserve a code comment. Also, does that mean the `OrderAccess::fence()` you added in `ZBarrierSetAssembler::patch_barrier_relocation()` unnecessary?

Yes. I added due to the comment.
I'll remove it and update that comment and add new comment about above.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20913#discussion_r1766573632