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Rust Binder has lists containing stuff such as all contexts or all processes, and sometimes needs to iterate over them. This patch enables Rust Binder to do that using a normal for loop. The iterator returns the ArcBorrow type, so it is possible to grab a refcount to values while iterating. Reviewed-by: Benno Lossin <benno.lossin@proton.me> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/r/20240814-linked-list-v5-7-f5f5e8075da0@google.com Signed-off-by: Miguel Ojeda <ojeda@kernel.org>