From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f180.google.com (mail-pg1-f180.google.com [209.85.215.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C31BA403AFA for ; Wed, 8 Jul 2026 08:26:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783499178; cv=none; b=hhyqCvBRmCSfcB2tKJz1AtKa6L58DrP18oBBxgdofmzwf4IpBYmcMrkOuQISZYvZAmxMrEwVled2EHOFLtwe5k02nAFSnCj+HiobxLbdNYt/uahtvE9qStld4DXCuHbDlW5jYDftT3+1ogZ8FjYY6brZZQGG/HNQc0apGMyozRQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783499178; c=relaxed/simple; bh=LjMlqvMgecGPg8wVROveeAGR3+uXyQO2X21W2PUKid8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=tgPXb52TzA7zTTYle1kq3Tu/JWXZ42InYkJ/IiP2nKA2baDSzZPaN5geOAL/eTPCkRXciK9/1ECyknP6BYRUs7tl64YljsZAV5BI4/Grc3sFKgevK7A2QuJyVGtWt2GHcHm0/eH5aAoqYDT4FUvX876J+5Pu8OFvod9Ikdr5kaM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mr+tJTvC; arc=none smtp.client-ip=209.85.215.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mr+tJTvC" Received: by mail-pg1-f180.google.com with SMTP id 41be03b00d2f7-c88a4d79ba5so226480a12.2 for ; Wed, 08 Jul 2026 01:26:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1783499174; x=1784103974; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=pXAgQLPERGwooEzHznzvpg6SzocRRloWRn0CUVpxEzA=; b=mr+tJTvCSEpZAjAMreqNYfU8sQD2MO11buRCeIe5VDFEGjXWVwsbuM4HyBN+SqPycS zpN+teQ5bqF53tC8xpdFomD74Q7KMLMr2uW8cY5n8flGrN3cp4nJ9wBGdHSWFN00kxCw IytvhU3aQRt/v4yWLTSsXCLPDe/qjeHRQjr4gqE9uiuW1k2TS4U7wdnnjTYYIptpeB7S yYbajSFK7qa0BodCfq6wy0EXoU4zO55vpXvzvnYOssmA2t+HR94kCzpyjg4WDTaGEHiG t3lEcWDkL9tujlPkkPhnXVswb17mMNr1hS4nirol8N/AU3x8PJiwDu8+vqMMUMQSltRV QdSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783499174; x=1784103974; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=pXAgQLPERGwooEzHznzvpg6SzocRRloWRn0CUVpxEzA=; b=DnUQfnM0hbxahGO7fD3DXO5OCxNEBFr+maWa5HnXwr+CtGuVZ9m4zUroQrpZpcOwUl aTCntFSSdxQFilUDCiWnRnrG3Ug6E+CjXOGbmw7kkOLiObE7tyMuk9VxHD6jNbm/RO45 fA9fBqE4rduBM9W3p1aJziNaDCUdgWAAMpCNxOXq5Pje2nFArobuxwLdPYIKQkoEFZYS 8XJhHBWDkJao1X4x4oXhY7XiDuJabWTGO2ECwvBQE4mjI5lwbOduOO/dQoDdZPiKYNsZ SofbwNz1CYsFkj+4mrfga11nBZh4zJpXBwdytpJwijSPUH/jgntXYNANmcb4xQOZCi3n m2qg== X-Forwarded-Encrypted: i=1; AHgh+RoY0gfEhSpIEAkZ56BqUk8pVjXFUp2p4HCg+evenlJVqYlGhyQWclKgUZWpuT0TBFdcrbae1tz7tRpvApY=@vger.kernel.org X-Gm-Message-State: AOJu0YwAz2+DlJRUIM7MaCjzRtUnKQfoW2fxCqTjrgg0qjfQUBr2C3J9 3m+jRc95btUk8Zaq5CzC/5z1+fKkdAyzY06rjPLeAkl83MGmnW+fO+kr X-Gm-Gg: AfdE7cmVZk4VRdayi8RAhnjZWBRLYIKw3FiFLcafN4i84kPoTVdesJY7utvN38elSTi tFxLCKYcElW28cttNI4uproJu9oisMnUd+xLhFg5zUntBu5uqMQutN9R0muU/YOyzOZG/HGsAkL gevIZ1lC5D+s3kDPZzkYPXhkWJKX1QnOT49jFWDp1nzLYT5K62lYQAjlxZ8iYLfot6BRfA5Zxlu CoRE8C+dPt6RfsXPpikjFwUNmteL2vfS5i9KgqvUncm8l5kkXm0bfxqm8U97frf0NkKOJyJMuvd xHBGFy9nC75501JQ8L8NSpgMOLyYcfu/gFwXiYGkMQ/em1I/4s6lPunRp7wKwyA/p/ifw90mWeZ hVPAqwxtu3AHVaAsGwrS2X3Yy75qEO8PzgsWhEHwuxnrwdfCdsFNMUeVJVSTh4lp0jspcD14Yhu sv2lYNfpHoinAVzKk7U6QiD8AcRF2qpZAIlcruIvGmLGDDcHnqvjzFIEPkpf509FdUnw== X-Received: by 2002:a05:6a21:9148:b0:3b3:f46:1eea with SMTP id adf61e73a8af0-3c0bcbe9c3fmr1852518637.7.1783499173930; Wed, 08 Jul 2026 01:26:13 -0700 (PDT) Received: from li-1a3e774c-28e4-11b2-a85c-acc9f2883e29.ibm.com.com ([106.51.160.236]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3117462f5c7sm19975117eec.0.2026.07.08.01.26.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jul 2026 01:26:13 -0700 (PDT) From: "Mukesh Kumar Chaurasiya (IBM)" To: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, peterz@infradead.org, jpoimboe@kernel.org, jbaron@akamai.com, aliceryhl@google.com, rostedt@goodmis.org, ardb@kernel.org, ojeda@kernel.org, boqun@kernel.org, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, tmgross@umich.edu, dakr@kernel.org, daniel.almeida@collabora.com, tamird@kernel.org, acourbot@nvidia.com, work@onurozkan.dev, nathan@kernel.org, ndesaulniers@google.com, morbo@google.com, justinstitt@google.com, fujita.tomonori@gmail.com, joelagnelf@nvidia.com, gregkh@linuxfoundation.org, prafulrai522@gmail.com, nsc@kernel.org, japo@linux.ibm.com, mkchauras@gmail.com, lina+kernel@asahilina.net, j@jannau.net, airlied@gmail.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, llvm@lists.linux.dev Cc: Link Mauve Subject: [PATCH V17 5/7] rust: Make __udivdi3() and __umoddi3() panic Date: Wed, 8 Jul 2026 13:54:52 +0530 Message-ID: <20260708082454.1254320-6-mkchauras@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260708082454.1254320-1-mkchauras@gmail.com> References: <20260708082454.1254320-1-mkchauras@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Link Mauve The core crate currently depends on these two functions for i64/u64/ i128/u128/core::time::Duration formatting, but we shouldn’t use that in the kernel so let’s panic if they are ever called. 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. Signed-off-by: Link Mauve Signed-off-by: Mukesh Kumar Chaurasiya (IBM) --- rust/Makefile | 4 ++++ rust/compiler_builtins.rs | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/rust/Makefile b/rust/Makefile index 17b2f329c13d..7aa8fcad4c43 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -677,6 +677,10 @@ ifneq ($(or $(CONFIG_ARM64),$(and $(CONFIG_RISCV),$(CONFIG_64BIT))),) __ashrti3 \ __ashlti3 __lshrti3 endif +ifdef CONFIG_PPC32 + redirect-intrinsics += \ + __udivdi3 __umoddi3 +endif ifdef CONFIG_MODVERSIONS cmd_gendwarfksyms = $(if $(skip_gendwarfksyms),, \ diff --git a/rust/compiler_builtins.rs b/rust/compiler_builtins.rs index dd16c1dc899c..fc6b54636dd5 100644 --- a/rust/compiler_builtins.rs +++ b/rust/compiler_builtins.rs @@ -97,5 +97,11 @@ pub extern "C" fn $ident() { __aeabi_uldivmod, }); +#[cfg(target_arch = "powerpc")] +define_panicking_intrinsics!("`u64` division/modulo should not be used", { + __udivdi3, + __umoddi3, +}); + // NOTE: if you are adding a new intrinsic here, you should also add it to // `redirect-intrinsics` in `rust/Makefile`. -- 2.55.0