linux-kernel - Re: [PATCH v2] rust: allow to use INIT_STACK_ALL

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Message-ID: <ZC+x8pqUVzWQ35fv@righiandr-XPS-13-7390>
Date:   Fri, 7 Apr 2023 08:02:26 +0200
From:   Andrea Righi <andrea.righi@...onical.com>
To:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc:     Kees Cook <kees@...nel.org>, Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        bjorn3_gh@...tonmail.com, Kees Cook <keescook@...omium.org>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] rust: allow to use INIT_STACK_ALL_ZERO

On Fri, Apr 07, 2023 at 12:52:18AM +0200, Miguel Ojeda wrote:
> On Sat, Feb 11, 2023 at 3:35 PM Andrea Righi <andrea.righi@...onical.com> wrote:
> >
> > oic, with clang-16 we get a deprecated warning (but it doesn't fail),
> > then starting with clang-17 the -enable.. flag is not available anymore.
> 
> Wait, Kees' link says it is deprecated in Clang 16, and the removal
> will happen in 18.
> 
> > Then I agree that a better check would be version < 16, instead of < 17.
> 
> Applied to `rust-fixes` with that changed. Please take a look if it is
> what you expected (both content and commit message):
> https://github.com/Rust-for-Linux/linux/commit/1921ea54ab0d91d7a660c5bb980fce1efc9223f9

The check (< 16) looks correct and the comment also looks correct to me,
this option will be removed in clang 18, as mentioned here:
https://github.com/llvm/llvm-project/blob/llvmorg-16.0.0-rc2/clang/docs/ReleaseNotes.rst#deprecated-compiler-flags

(Maybe we could add also this link as a reference)

Thanks!
-Andrea