From: "Arnd Bergmann" <arnd@arndb.de>
To: "Mukesh Kumar Chaurasiya (IBM)" <mkchauras@gmail.com>,
"Madhavan Srinivasan" <maddy@linux.ibm.com>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Nicholas Piggin" <npiggin@gmail.com>,
"Christophe Leroy" <chleroy@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Josh Poimboeuf" <jpoimboe@kernel.org>,
"Jason Baron" <jbaron@akamai.com>,
"Alice Ryhl" <aliceryhl@google.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
boqun@kernel.org, "Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Trevor Gross" <tmgross@umich.edu>,
"Danilo Krummrich" <dakr@kernel.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nick Desaulniers" <nick.desaulniers+lkml@gmail.com>,
"Bill Wendling" <morbo@google.com>,
"Justin Stitt" <justinstitt@google.com>,
tamird@kernel.org, "Nicolas Schier" <nsc@kernel.org>,
simona.vetter@ffwll.ch, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
rust-for-linux@vger.kernel.org, llvm@lists.linux.dev
Cc: "Link Mauve" <linkmauve@linkmauve.fr>
Subject: Re: [PATCH V13 5/7] rust: Make __udivdi3() and __umoddi3() panic
Date: Fri, 24 Apr 2026 10:59:27 +0200 [thread overview]
Message-ID: <b5e7c099-3a5a-44dc-bc7b-42429abe3aec@app.fastmail.com> (raw)
In-Reply-To: <20260424054742.45832-6-mkchauras@gmail.com>
On Fri, Apr 24, 2026, at 07:47, Mukesh Kumar Chaurasiya (IBM) wrote:
>
> This doesn’t yet fix drm_panic_qr.rs, which also uses __udivdi3 when
> CONFIG_CC_OPTIMIZE_FOR_SIZE=y, but at least makes the rest of the kernel
> build on PPC32.
It looks like the problem is commit 9af8f2b469c0 ("drm/panic: Add a
u64 divide by 10 for arm32") describing this as an arm32 specific
issue rather than something common for any 32-bit architecture.
You can probably add a rust version of div_u64() and use that
there.
Arnd
next prev parent reply other threads:[~2026-04-24 8:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-24 5:47 [PATCH V13 0/7] Rust support for powerpc Mukesh Kumar Chaurasiya (IBM)
2026-04-24 5:47 ` [PATCH V13 1/7] rust: Fix "multiple candidates for rmeta dependency core" error Mukesh Kumar Chaurasiya (IBM)
2026-04-24 5:47 ` [PATCH V13 2/7] dma-resv: Fix undefined symbol when CONFIG_DMA_SHARED_BUFFER is disabled Mukesh Kumar Chaurasiya (IBM)
2026-04-24 7:56 ` Christian König
2026-04-24 8:06 ` Mukesh Kumar Chaurasiya
2026-04-24 8:25 ` Christian König
2026-04-24 8:34 ` Mukesh Kumar Chaurasiya
2026-04-24 8:44 ` Christian König
2026-04-24 5:47 ` [PATCH V13 3/7] powerpc/jump_label: adjust inline asm to be consistent Mukesh Kumar Chaurasiya (IBM)
2026-04-24 5:47 ` [PATCH V13 4/7] rust/powerpc: Set min rustc version for powerpc Mukesh Kumar Chaurasiya (IBM)
2026-04-24 5:47 ` [PATCH V13 5/7] rust: Make __udivdi3() and __umoddi3() panic Mukesh Kumar Chaurasiya (IBM)
2026-04-24 8:59 ` Arnd Bergmann [this message]
2026-04-24 9:14 ` David Laight
2026-04-24 9:43 ` Link Mauve
2026-04-24 10:20 ` Arnd Bergmann
2026-04-24 10:34 ` Miguel Ojeda
2026-04-24 10:26 ` Miguel Ojeda
2026-04-24 11:09 ` David Laight
2026-04-27 16:05 ` [Linaro-mm-sig] " Arnd Bergmann
2026-04-24 11:54 ` Segher Boessenkool
2026-04-24 11:57 ` Segher Boessenkool
2026-04-24 12:53 ` Segher Boessenkool
2026-04-24 12:43 ` Gary Guo
2026-04-26 7:52 ` Mukesh Kumar Chaurasiya
2026-04-26 14:20 ` Gary Guo
2026-04-26 22:04 ` David Laight
2026-04-27 13:04 ` Gary Guo
2026-04-24 5:47 ` [PATCH V13 6/7] rust: Add PowerPC support Mukesh Kumar Chaurasiya (IBM)
2026-04-24 5:47 ` [PATCH V13 7/7] powerpc: Enable Rust for ppc64le Mukesh Kumar Chaurasiya (IBM)
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