FAILED: patch "[PATCH] objtool/rust: add one more `noreturn` Rust function for Rust" failed to apply to 6.12-stable tree

FAILED: patch "[PATCH] objtool/rust: add one more `noreturn` Rust function for Rust" failed to apply to 6.12-stable tree

[gregkh]

The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x 16861ca3508e0deac70d3bcacb6dcf435b49d9ef
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026090324-constrain-truffle-09ee@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 16861ca3508e0deac70d3bcacb6dcf435b49d9ef Mon Sep 17 00:00:00 2001
From: Miguel Ojeda <ojeda@kernel.org>
Date: Tue, 28 Jul 2026 21:14:48 +0200
Subject: [PATCH] objtool/rust: add one more `noreturn` Rust function for Rust
 1.99.0

Starting with Rust 1.99.0 (expected 2026-10-01), `objtool` may report:

    rust/kernel.o: warning: objtool: _R..._6kernel3str9parse_intaNtNtB2_7private12FromStrRadix14from_str_radix()
    falls through to next function _R..._6kernel3str9parse_intaNtNtB2_7private12FromStrRadix16from_u64_negated()

due to calls to the `noreturn` symbol:

    core::num::from_ascii_bytes_radix_panic

The function was renamed from `from_ascii_radix_panic` [1], which is
already in the list.

Thus add the new one to the list so that `objtool` knows it is actually
`noreturn`.

See commit 56d680dd23c3 ("objtool/rust: list `noreturn` Rust functions")
for more details.

Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs).
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://github.com/rust-lang/rust/pull/159554 [1]
Tested-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20260728191448.349241-1-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index f03dd59e7fca..87db9f4ed9e2 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -194,6 +194,7 @@ static bool is_rust_noreturn(const struct symbol *func)
 	 */
 	return str_ends_with(func->name, "_4core3num20from_str_radix_panic")				||
 	       str_ends_with(func->name, "_4core3num22from_ascii_radix_panic")				||
+	       str_ends_with(func->name, "_4core3num28from_ascii_bytes_radix_panic")			||
 	       str_ends_with(func->name, "_4core5sliceSp15copy_from_slice17len_mismatch_fail")		||
 	       str_ends_with(func->name, "_4core6option13expect_failed")				||
 	       str_ends_with(func->name, "_4core6option13unwrap_failed")				||

Re: FAILED: patch "[PATCH] objtool/rust: add one more `noreturn` Rust function for Rust" failed to apply to 6.12-stable tree

[Miguel Ojeda]

On Thu, Sep 3, 2026 at 2:43 PM <gregkh@linuxfoundation.org> wrote:
>
> The patch below does not apply to the 6.12-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.

To solve this one and the related ones, please see this sequence of
cherry-picks:

  https://lore.kernel.org/stable/CANiq72kmYx5GBU7VL3z8h3bAWB=vw-TX+ptskDO0k3Ro-F450w@mail.gmail.com/

Cheers,
Miguel