RFR: 8377035: [s390x] Disable JSR166 test cases which uses virtual threads [v3]

[Alan Bateman]

On Wed, 11 Feb 2026 10:10:36 GMT, Harshit470250 <duke at openjdk.org> wrote:

>> ReentrantReadWriteLock20Test.java is failing on s390 due to virtual threads which are not yet implemented on s390. 
>> SynchronousQueue20Test.java also uses virtual thread so I am also disabling it.
>
> Harshit470250 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   build platform library

test/jdk/java/util/concurrent/tck/JSR166TestCase.java line 634:

> 632:             };
> 633: 
> 634:             if (!Platform.isS390x()) {

I assume the intent is to remove this patch once the s390x port is further along. In that case maybe leave the above as is and use if (`Platform.isS390x())` to set java20TestClassNames to the subset that can be run on that platform.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29555#discussion_r2797045410