[aarch64-port-dev ] RFR: Fix biased locking and enable as default

[Andrew Haley]

On 04/24/2014 10:58 AM, Edward Nevill wrote:
> I have also re-enabled the call to biased_locking_enter in generate_native_wrapper which was commented out for some reason and also fixed the register usage in that call (calls to biased_locking_enter must not pass rscratch1 as the tmp because that is used internally within biased_locking_enter).

Can you assert that rscratch1 is not tmp in biased_locking_enter?
Otherwise OK.

Thanks,
Andrew.