From: Alice Ryhl <aliceryhl@google.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Nathan Chancellor <nathan@kernel.org>,
Jan Polensky <japo@linux.ibm.com>,
hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com,
ojeda@kernel.org, peterz@infradead.org, jpoimboe@kernel.org,
jbaron@akamai.com, borntraeger@linux.ibm.com,
svens@linux.ibm.com, boqun@kernel.org, gary@garyguo.net,
bjorn3_gh@protonmail.com, lossin@kernel.org,
a.hindborg@kernel.org, tmgross@umich.edu, dakr@kernel.org,
rostedt@goodmis.org, ardb@kernel.org,
linux-s390@vger.kernel.org, rust-for-linux@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 6/6] s390: Enable Rust support
Date: Tue, 16 Jun 2026 07:39:39 +0000 [thread overview]
Message-ID: <ajD9uw7MhsisxdzY@google.com> (raw)
In-Reply-To: <CANiq72nkm2YwxcV+vwDj+v0svd6e1dro-W_0ybVms3pG_oJiXg@mail.gmail.com>
On Mon, Jun 15, 2026 at 06:45:26PM +0200, Miguel Ojeda wrote:
> On Mon, Jun 15, 2026 at 6:40 PM Nathan Chancellor <nathan@kernel.org> wrote:
> >
> > With Rust 1.96.0, I see the following warning several times when
> > building Rust code in -next:
> >
> > warning: unstable feature specified for `-Ctarget-feature`: `backchain`
> > |
> > = note: this feature is not stably supported; its behavior can change in the future
> >
> > warning: 1 warning emitted
> >
> > I assume this is expected? If so, is there a way to silence this warning?
>
> Yes, it seems so -- please see this thread:
>
> https://lore.kernel.org/rust-for-linux/CANiq72m4GVWFYqnxNtCHTPu7XcGewHB5LNwOoayTfnXs9pPbNg@mail.gmail.com/
>
> If they are OK with it, then I guess it is fine, but it does mean CIs
> can suffer a bit from it.
Since fixing this requires a change in rustc to recognize the backchain
target feature, has this work been started? I think that for stuff like
this, we should make to at least start working on fixing the warning so
that we don't emit a warning forever.
Alice
next prev parent reply other threads:[~2026-06-16 7:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-08 18:14 [PATCH v6 0/6] s390: Enable Rust support and add required arch glue Jan Polensky
2026-06-08 18:14 ` [PATCH v6 1/6] s390/bug: Provide ARCH_WARN_ASM for Rust WARN/BUG support Jan Polensky
2026-06-08 18:14 ` [PATCH v6 2/6] s390/jump_label: Implement ARCH_STATIC_BRANCH_JUMP_ASM and ARCH_STATIC_BRANCH_ASM macros Jan Polensky
2026-06-08 18:14 ` [PATCH v6 3/6] rust/bindgen_parameters: Mark s390 types as opaque to prevent repr conflicts Jan Polensky
2026-06-08 18:14 ` [PATCH v6 4/6] rust: helpers: Add memchr wrapper for string operations Jan Polensky
2026-06-08 18:14 ` [PATCH v6 5/6] s390/cmpxchg: Fix KASAN stack-out-of-bounds in atomic helpers Jan Polensky
2026-06-08 18:14 ` [PATCH v6 6/6] s390: Enable Rust support Jan Polensky
2026-06-08 18:25 ` Gary Guo
2026-06-08 19:45 ` Jan Polensky
2026-06-09 13:51 ` Alexander Gordeev
2026-06-09 14:00 ` Gary Guo
2026-06-15 16:40 ` Nathan Chancellor
2026-06-15 16:45 ` Miguel Ojeda
2026-06-16 3:04 ` Nathan Chancellor
2026-06-16 7:39 ` Alice Ryhl [this message]
2026-06-16 8:45 ` Miguel Ojeda
2026-06-16 14:05 ` Jan Polensky
2026-06-16 14:22 ` Miguel Ojeda
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