RFR: 8261309: Remove remaining StoreLoad barrier with UseCondCardMark for Serial/Parallel GC

[Thomas Schatzl]

On Mon, 15 Feb 2021 08:37:24 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Hi all,
>> 
>>   can I have reviews for this (tiny) change that removes the last (unconditional) StoreLoad memory barrier for Serial/Parallel GC that has apparently been forgotten to be made conditional on `CardTable::scanned_concurrently()` just removed in [JDK-8260941](https://bugs.openjdk.java.net/browse/JDK-8260941) ?
>> 
>> Thanks,
>>   Thomas
>> 
>> Testing: automatic compilation via github actions, but this is a quite straightforward removal of a single line...
>
> Looks good.

Thanks @shipilev , @albertnetymk , @kstefanj  for your reviews.

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PR: https://git.openjdk.java.net/jdk/pull/2541