linux-kernel - Re: [PATCH 2/5] rust: map `__kernel_size

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Message-ID: <CALNs47t9xTymmFnwhUDkHypb-ftK+ukDrcGe_80mKyv6cr6StQ@mail.gmail.com>
Date: Sun, 29 Sep 2024 17:02:57 -0400
From: Trevor Gross <tmgross@...ch.edu>
To: Gary Guo <gary@...yguo.net>
Cc: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	Alice Ryhl <aliceryhl@...gle.com>, Finn Behrens <me@...enk.dev>, 
	Martin Rodriguez Reboredo <yakoyoku@...il.com>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] rust: map `__kernel_size_t` and friends also to usize/isize

On Fri, Sep 13, 2024 at 5:32 PM Gary Guo <gary@...yguo.net> wrote:
>
> Currently bindgen has special logic to recognise `size_t` and `ssize_t`
> and map them to Rust `usize` and `isize`. Similarly, `ptrdiff_t` is
> mapped to `isize`.
>
> However this falls short for `__kernel_size_t`, `__kernel_ssize_t` and
> `__kernel_ptrdiff_t`. To ensure that they are mapped to usize/isize
> rather than 32/64 integers depending on platform, blocklist them in
> bindgen parameters and manually provide their definition.
>
> Signed-off-by: Gary Guo <gary@...yguo.net>

Reviewed-by: Trevor Gross <tmgross@...ch.edu>