RFR: 8232116: ZGC: Remove redundant ZLock in ZNMethodTable

[Erik Osterlund]

Hi Stefan,

Thanks for the review.

/Erik

> On 10 Oct 2019, at 19:00, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:
> 
> Looks good.
> 
> StefanK
> 
>> On 2019-10-10 17:31, erik.osterlund at oracle.com wrote:
>> Hi,
>> 
>> The safe memory reclamation technique used in the ZNMethodTable has an unnecessary ZLock. This lock is statically initialized, which creates some bootstrapping issues. We should remove the lock, as in the context it is used, we are always protected under the CodeCache_lock.
>> 
>> Bug:
>> https://bugs.openjdk.java.net/browse/JDK-8232116
>> 
>> Webrev:
>> http://cr.openjdk.java.net/~eosterlund/8232116/webrev.00/
>> 
>> Thanks,
>> /Erik
>