RFR: 8291555: Implement alternative fast-locking scheme [v28]

[Daniel D. Daugherty]

On Thu, 16 Mar 2023 20:57:31 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> src/hotspot/cpu/x86/x86_32.ad line 617:
>> 
>>> 615:   int bangsize = C->output()->bang_size_in_bytes();
>>> 616: 
>>> 617:   __ verified_entry(framesize, C->output()->need_stack_bang(bangsize)?bangsize:0, C->in_24_bit_fp_mode(), C->stub_function() != NULL);
>> 
>> Why did this change from `nullptr` -> `NULL`?
>
> I reverted that part back to upstream state (at least what is in JDK-21+13).

Okay.

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PR: https://git.openjdk.org/jdk/pull/10907