linux-kernel - Re: [PATCH v2 25/28] rust: add `build

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Date:   Fri, 2 Dec 2022 18:31:27 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     ojeda@...nel.org
Cc:     Wedson Almeida Filho <wedsonaf@...il.com>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev, Wei Liu <wei.liu@...nel.org>
Subject: Re: [PATCH v2 25/28] rust: add `build_error` crate

On Fri, Dec 02, 2022 at 05:14:56PM +0100, ojeda@...nel.org wrote:
> From: Gary Guo <gary@...yguo.net>
> 
> The `build_error` crate provides a function `build_error` which
> will panic at compile-time if executed in const context and,
> by default, will cause a build error if not executed at compile
> time and the optimizer does not optimise away the call.
> 
> The `CONFIG_RUST_BUILD_ASSERT_ALLOW` kernel option allows to
> relax the default build failure and convert it to a runtime
> check. If the runtime check fails, `panic!` will be called.
> 
> Its functionality will be exposed to users as a couple macros in
> the `kernel` crate in the following patch, thus some documentation
> here refers to them for simplicity.
> 
> Signed-off-by: Gary Guo <gary@...yguo.net>
> [Reworded, adapted for upstream and applied latest changes]
> Signed-off-by: Miguel Ojeda <ojeda@...nel.org>

Reviewed-by: Wei Liu <wei.liu@...nel.org>