RFR: 8261268: LOAD_INSTANCE placeholders unneeded for parallelCapable class loaders [v2]

[Coleen Phillimore]

On Tue, 9 Feb 2021 21:19:58 GMT, Ioi Lam <iklam at openjdk.org> wrote:

>> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix some comment
>
> LGTM

Thanks Ioi.  I reworded the comment we talked about offline.
+    //    These class loaders lock a per-class object lock when ClassLoader.loadClass()
+    //    is called. A LOAD_INSTANCE placeholder isn't used for mutual exclusion.

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PR: https://git.openjdk.java.net/jdk/pull/2469