[zl523856](https://github.com/zl523856) started by submitting [an
issue](https://github.com/openssl/openssl/issues/28027) that asking about the
proposed change. The pull request includes [some assembly
code](https://github.com/openssl/openssl/pull/28048/files) that improves the
performance of the AES-128-CBC decryption algorithm on the [RISC-V
architecture](https://en.wikipedia.org/wiki/RISC-V). It's not the sort of code
that just anyone can write. Open source projects, such as OpenSSL, can benefit
from one-time contributions of expertise. In turn, anyone who uses OpenSSL or
products that include the library also benefit. It's a beautiful thing.