RFR: 8239927: Product variable PrefetchFieldsAhead is unused and should be removed [v4]

[Stuart Monteith]

On Thu, 20 Jan 2022 15:58:09 GMT, Bhavana-Kilambi <duke at openjdk.java.net> wrote:

>> The product variable "PrefetchFieldsAhead" is defined in gc_globals.hpp and set in vm_version_x86.cpp. 
>> But as it's not used anywhere, removing this option from the JDK source.
>
> Bhavana-Kilambi has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains two commits:
> 
>  - Merge master
>  - 8239927: Product variable PrefetchFieldsAhead is unused and should be removed

Hello @dholmes-ora , would it be possible for you to give this a proper review now it has been CSR approved?
Thanks.

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PR: https://git.openjdk.java.net/jdk/pull/6783