Missing epoll_pwait2 syscall wrapper

Hello!

Goal

One of my C++ projects uses an epoll reactor to implement async execution. The implementation makes heavy use of epoll_pwait2().

One of the target architecture is aarch64. Currently we can only perform unit tests directly on HW as QEMU doesn't implement a syscall wrapper for epoll_pwait2().

Technical details

Looking through the mailing list I found that there was indeed an attempt in April 2025 to implement this: Link

The patch was part of this PR, but apparantly it never landed in QEMU master.

Most likely the reason was this CI failure.

I have not tested the patch myself, so I cannot comment on the quality and if the CI failure is indeed a problem.

I'm unsure how to properly proceed here. I could try to submit the patch myself. Or perhaps I should ping Zixing Liu on the mailing list to inquire if he intends to resend the patch?

Any recommendations?

Additional information

None for now.

With best wishes,
Tobias