RFR: 8317575: AArch64: C2_MacroAssembler::fast_lock uses rscratch1 for cmpxchg result

[Vladimir Kozlov]

On Thu, 5 Oct 2023 08:08:31 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

> Please review this removal a potentially problematic usage of rscratch1 in C2_MacroAssembler::fast_lock.

Good.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/16049#pullrequestreview-1674571061