From: Alyssa Ross <hi@alyssa.is>
To: Greg KH <gregkh@linuxfoundation.org>,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Sasha Levin <sashal@kernel.org>,
Huacai Chen <chenhuacai@loongson.cn>,
WANG Xuerui <kernel@xen0n.name>, WANG Rui <wangrui@loongson.cn>,
Tiezhu Yang <yangtiezhu@loongson.cn>,
stable@vger.kernel.org, Miguel Ojeda <ojeda@kernel.org>,
Alice Ryhl <aliceryhl@google.com>,
Trevor Gross <tmgross@umich.edu>, Nicolas Schier <nsc@kernel.org>
Subject: Re: [PATCH 6.12.y] rust: kbuild: support `-Cjump-tables=n` for Rust 1.93.0
Date: Tue, 03 Feb 2026 18:18:31 +0100 [thread overview]
Message-ID: <87sebhvj88.fsf@alyssa.is> (raw)
In-Reply-To: <2026020348-rehydrate-glider-b1f3@gregkh>
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Greg KH <gregkh@linuxfoundation.org> writes:
> On Thu, Jan 29, 2026 at 04:03:06PM +0100, Miguel Ojeda wrote:
>> On Thu, Jan 29, 2026 at 3:55 PM Miguel Ojeda
>> <miguel.ojeda.sandonis@gmail.com> wrote:
>> >
>> > On Thu, Jan 29, 2026 at 2:37 PM Alyssa Ross <hi@alyssa.is> wrote:
>> > >
>> > > From: Miguel Ojeda <ojeda@kernel.org>
>> > >
>> > > Rust 1.93.0 (expected 2026-01-22) is stabilizing `-Zno-jump-tables`
>> > > [1][2] as `-Cjump-tables=n` [3].
>> > >
>> > > Without this change, one would eventually see:
>> > >
>> > > RUSTC L rust/core.o
>> > > error: unknown unstable option: `no-jump-tables`
>> > >
>> > > Thus support the upcoming version.
>> > >
>> > > Link: https://github.com/rust-lang/rust/issues/116592 [1]
>> > > Link: https://github.com/rust-lang/rust/pull/105812 [2]
>> > > Link: https://github.com/rust-lang/rust/pull/145974 [3]
>> > > Reviewed-by: Alice Ryhl <aliceryhl@google.com>
>> > > Reviewed-by: Trevor Gross <tmgross@umich.edu>
>> > > Acked-by: Nicolas Schier <nsc@kernel.org>
>> > > Link: https://patch.msgid.link/20251101094011.1024534-1-ojeda@kernel.org
>> > > Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
>> > > (cherry picked from commit 789521b4717fd6bd85164ba5c131f621a79c9736)
>> > > Signed-off-by: Alyssa Ross <hi@alyssa.is>
>> >
>> > Thanks!
>> >
>> > Greg, Sasha: yes, please take this one -- this commit should have had:
>> >
>> > Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is
>> > pinned in older LTSs).
>> >
>> > which was in the email thread, but I didn't pick it up and neither
>> > `b4` did, my mistake.
>>
>> By the way, if LoongArch (Cc'd) would like to backport commit
>>
>> 74f8295c6fb8 ("LoongArch: Handle jump tables options for RUST")
>>
>> then this would be a good chance to do so, since the one here would go
>> on top of that one (Alyssa backported the x86 subset of the patch --
>> for the future, by the way, it would be nice to note it in the commit
>> message in between [ ... ]).
>
> It doesn't apply to the 6.12.y tree cleanly :(
Doesn't need to be AFAICT, because -Zno-jump-tables isn't used on 6.12.
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next prev parent reply other threads:[~2026-02-03 17:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-29 13:37 [PATCH 6.12.y] rust: kbuild: support `-Cjump-tables=n` for Rust 1.93.0 Alyssa Ross
2026-01-29 14:55 ` Miguel Ojeda
2026-01-29 15:03 ` Miguel Ojeda
2026-02-03 14:42 ` Greg KH
2026-02-03 17:18 ` Alyssa Ross [this message]
2026-02-06 10:47 ` Miguel Ojeda
2026-02-06 13:04 ` Alyssa Ross
2026-02-06 10:45 ` Miguel Ojeda
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