[jdk21] RFR: 8310656: RISC-V: __builtin___clear_cache can fail silently. [v2]

[Robbin Ehn]

On Thu, 6 Jul 2023 20:16:14 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Hi all,
>> 
>> This pull request contains a backport of commit [faf1b822](https://github.com/openjdk/jdk/commit/faf1b822d03b726413d77a2b247dfbbf4db7d57e) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
>> 
>> The commit being backported was authored by Robbin Ehn on 2 Jul 2023 and was reviewed by Ludovic Henry, Thomas Stuefe and Fei Yang.
>> 
>> Thanks!
>
> Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added missing global defines in jdk 21
>   
>   Signed-off-by: Robbin Ehn <rehn at rivosinc.com>

@tstuefe @luhenry @RealFYang any takers ? :)

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PR Comment: https://git.openjdk.org/jdk21/pull/90#issuecomment-1624957247