RFR: 8264788: Make SequentialSubTasksDone use-once [v2]

[Stefan Johansson]

On Thu, 8 Apr 2021 15:05:42 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   can I have reviews for this change that simplifies code ahead?
>> 
>> SequentialSubTasksDone has some machinery to reset itself automatically after all tasks were claimed.
>> 
>> This is not used at all and can/should be removed. 
>> 
>> Test: tier1-3
>
> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   ayang review

Looks good.

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Marked as reviewed by sjohanss (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3372