RFR: 8261579: AArch64: Support for weaker memory ordering in Atomic [v4]

[Andrew Haley]

On Mon, 28 Jun 2021 14:54:34 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Sanitize memory order for BSD CAS
>
> src/hotspot/os_cpu/linux_aarch64/atomic_linux_aarch64.S line 122:
> 
>> 120:         cmp     w3, w1
>> 121:         b.ne    1f
>> 122:         stlxr    w8, w2, [x0]
> 
> Suggestion:
> 
>         stlxr   w8, w2, [x0]

Well spotted!

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PR: https://git.openjdk.java.net/jdk/pull/4597