From: FUJITA Tomonori <tomo@flapping.org>
To: miguel.ojeda.sandonis@gmail.com
Cc: tomo@flapping.org, ojeda@kernel.org, arnd@arndb.de,
krzk@kernel.org, alexandre.belloni@bootlin.com,
linusw@kernel.org, chenhuacai@kernel.org, boqun@kernel.org,
gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org,
a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu,
dakr@kernel.org, daniel.almeida@collabora.com, tamird@kernel.org,
acourbot@nvidia.com, work@onurozkan.dev,
rust-for-linux@vger.kernel.org, fustini@kernel.org,
linux-arm-kernel@lists.infradead.org, soc@lists.linux.dev,
kernel@xen0n.name, loongarch@lists.linux.dev,
stable@vger.kernel.org
Subject: Re: [PATCH] rust: bug: fix `dead_code` warning in `warn_on!`
Date: Sat, 08 Aug 2026 14:30:13 +0900 (JST) [thread overview]
Message-ID: <20260808.143013.1251068388254615351.tomo@flapping.org> (raw)
In-Reply-To: <CANiq72n4=fz=JNKY0Jdm8BnLa=RmHB2B7s0bO47YTJ7hygqBZg@mail.gmail.com>
On Sat, 8 Aug 2026 01:21:23 +0200
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> wrote:
> On Sat, Aug 8, 2026 at 12:43 AM FUJITA Tomonori <tomo@flapping.org> wrote:
>>
>> I sent a fix for this bug a few days ago:
>>
>> https://lore.kernel.org/all/20260801024841.786664-1-tomo@flapping.org/
>
> Ah, right, sorry! I also saw another one with `rusttest` for arm64 and
> riscv64. Did you see that one? We probably need a `cfg(testlib)`
> split.
Is this the one you saw?
error: invalid instruction mnemonic 'brk'
--> rust/kernel/bug.rs:63:17
|
63 | / concat!(
64 | | "/* {size} */",
65 | | include!(concat!(env!("OBJTREE"), "/rust/kernel/generated_arch_warn_asm.rs")),
66 | | include!(concat!(env!("OBJTREE"), "/rust/kernel/generated_arch_reachable_asm.rs")));
| |_______________________________________________________________________________________________________^
|
note: instantiated into assembly here
--> <inline asm>:1:115
|
1 | /* 8 */.pushsection __bug_table,"aw"; .align 2; 14470: .long 14471f - .;.short 2305;.align 2; .popsection; 14471:brk 0x800
| ^^^
It shows up when `make rusttest` runs with `ARCH=` set to an
architecture other than the host's.
I posted a `cfg(testlib)` split for it:
https://lore.kernel.org/all/20260808022608.1125174-1-tomo@flapping.org/
While at it, a question: what is `rusttest` meant to cover when
`ARCH=` is not the host's?
next prev parent reply other threads:[~2026-08-08 5:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-07 22:14 [PATCH] rust: bug: fix `dead_code` warning in `warn_on!` Miguel Ojeda
2026-08-07 22:19 ` Miguel Ojeda
2026-08-07 22:43 ` FUJITA Tomonori
2026-08-07 23:21 ` Miguel Ojeda
2026-08-08 5:30 ` FUJITA Tomonori [this message]
2026-08-08 19:40 ` Miguel Ojeda
2026-08-09 0:50 ` FUJITA Tomonori
2026-08-09 3:01 ` Miguel Ojeda
2026-08-09 14:41 ` Gary Guo
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