Hi, We want to add isolation for shared code changes.
1.To minimize the difference with jdk17u-dev upstream, the jdk17u-dev backport does isolate public code changes to avoid code changes to other architectures[1];
2.riscv-port-jdk11u is missing the sparc architecture adaptation in the backport, this may affect the correctness of the sparc architecture.
### Test
-[x] Run tier1-3 tests on linux-x86 (release)
-[x] Run tier1-3 tests on linux-arm64 (release)
-[x] Run tier1-3 tests on on LicheePI 4A (release)

[1]: https://github.com/yadongw/riscv-port-jdk17u/commit/6bc31f690036ebf7d0db55b1e2ef83b13b74fed3