Hi all,

This is a two-patch series for the Rust-for-Linux tree:

  1) rust: mark CStr::to_str #[must_use] and update docs
     - Adds an "# Errors" section explaining UTF-8 failure modes
     - Prevents silent ignores by marking to_str() as #[must_use]
     - Documents safety preconditions on as_str_unchecked()

  2) rust: clarify safety comments in workqueue.rs
     - Replaces generic SAFETY: TODO with detailed invariants
       for RawWorkItem::__enqueue and WorkItemPointer::run

Please let me know if you’d like any tweaks.

Thanks,
—Slopisgood