Re: [PATCH 1/3] rust: pin-init: internal: init: allow reborrow of `Pin<&mut T>` bindings

["Alexandre Courbot" <acourbot@nvidia.com>]

On Tue Sep 29, 2026 at 2:32 AM JST, Gary Guo wrote:
> Use `let mut` for created bindings of initialized field, so `Pin<&mut T>`
> bindings may be reborrowed in subsequent initializers or code blocks.
>
> Without `let mut`, attempt to reborrow can produce error (and also a
> confusing fix):
>
>     error[E0596]: cannot borrow `gpu` as mutable, as it is not declared as mutable
>        --> drivers/gpu/nova-core/driver.rs:129:17
>         |
>     129 |                 gpu.as_mut().run_selftests(pdev);
>         |                 ^^^ cannot borrow as mutable
>         |
>     help: consider changing this to be mutable                                                                                                                                                                                  |
>     119 |             mut gpu <- Gpu::new(
>         |             +++
>
>     error: aborting due to 1 previous error
>
> Reported-by: Danilo Krummrich <dakr@kernel.org>
> Closes: https://lore.kernel.org/nova-gpu/DLQXWXRP3P1J.28SLFOJJQ2EDK@kernel.org/
> Signed-off-by: Gary Guo <gary@garyguo.net>

I've hit this issue a couple of times already, so it's a very welcome
change!

FWIW,

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>