Claude review: rust: interop: Add list module for C linked list interface

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Overall Series Review

Subject: rust: interop: Add list module for C linked list interface
Author: Joel Fernandes <joelagnelf@nvidia.com>
Patches: 2
Reviewed: 2026-03-09T08:15:54.333321

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This is a single-patch series (v12) adding a Rust `interop::list` module that provides safe abstractions for iterating over C `list_head`-based linked lists from Rust. The primary use-case is GPU buddy allocator block iteration for nova-core memory management. The code is well-structured, properly documented, and has accumulated reviews/acks from several kernel Rust maintainers (Daniel Almeida, Alexandre Courbot, Gary Guo, Miguel Ojeda).

The design is sound: a layered approach with `CListHead` (raw node wrapper), `CListHeadIter` (low-level node iterator), `CList<T, OFFSET>` (typed list wrapper), and `CListIter` (typed iterator), plus a `clist_create!` macro for ergonomic construction with compile-time type checking. The read-only nature of the API (no mutation operations) simplifies safety reasoning considerably.

Overall this looks ready for merging. I have a few observations below but no blocking issues.

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