linux-kernel - Re: next-20250818: rust: `ARCH_KMALLOC_MINALIGN` is defined multiple times

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Message-ID: <CANiq72k-Z9=EVVXgJp1OuKwSbQ3qq723B0F2PaPzRD4P+QEQ=A@mail.gmail.com>
Date: Tue, 19 Aug 2025 16:00:44 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Naresh Kamboju <naresh.kamboju@...aro.org>, Thorsten Leemhuis <linux@...mhuis.info>, 
	Danilo Krummrich <dakr@...nel.org>
Cc: open list <linux-kernel@...r.kernel.org>, 
	"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>, rust-for-linux@...r.kernel.org, 
	clang-built-linux <llvm@...ts.linux.dev>, Miguel Ojeda <ojeda@...nel.org>, wedsonaf@...il.com, 
	Gary Guo <gary@...yguo.net>, Benno Lossin <benno.lossin@...ton.me>, 
	Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, 
	Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, 
	Anders Roxell <anders.roxell@...aro.org>, Ben Copeland <benjamin.copeland@...aro.org>
Subject: Re: next-20250818: rust: `ARCH_KMALLOC_MINALIGN` is defined multiple times

On Tue, Aug 19, 2025 at 10:40 AM Naresh Kamboju
<naresh.kamboju@...aro.org> wrote:
>
> Build regressions were detected on multiple architectures (arm, arm64,
> riscv) with the Linux next-20250818 tag when building with Rust-enabled
> configurations (rust-gcc and rust-clang) from selftests/rust/config.
>
> Duplicate definition of ARCH_KMALLOC_MINALIGN in Rust bindings is
> causing build failures across affected toolchains.

Thanks a lot Naresh, this was reported already by Thorsten and me yesterday:

    https://lore.kernel.org/rust-for-linux/8aa05f08-ef6e-4dfe-9453-beaab7b3cb98@leemhuis.info/

A patch from Danilo is in flight to fix it:

    https://lore.kernel.org/rust-for-linux/20250818180923.192042-1-dakr@kernel.org/

If you could test it, that would be great. I assume Danilo will apply
the patch on top of alloc-next, since the issue is just inside that
branch that goes into linux-next.

Thanks!

Cheers,
Miguel