RFR: 8177397: [JVMCI] remove unnecessary synchronization

[Doug Simon]

> On 3 Nov 2017, at 16:02, Tobias Hartmann <tobias.hartmann at oracle.com> wrote:
> 
> Hi Doug,
> 
> looks good to me.

Thanks for the review.

-Doug

> 
> Best regards,
> Tobias
> 
> On 03.11.2017 15:55, Doug Simon wrote:
>> Please review this tiny change to remove some unnecessary synchronization.
>> 
>> https://bugs.openjdk.java.net/browse/JDK-8177397
>> http://cr.openjdk.java.net/~dnsimon/8177397/
>> 
>> -Doug
>>