From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E13AAC43458 for ; Wed, 8 Jul 2026 08:26:17 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4gwB544L17z30BJ; Wed, 08 Jul 2026 18:26:16 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2607:f8b0:4864:20::52f" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1783499176; cv=none; b=fPmu4lIANMg8W6WQESUbS5BhK02TDv+uwYa7+Sqxerpykz35X8BT2wYF8U0Atz1UV02OIootLBCfpVliJHGNtgYH41oyxcJpl1woBg6Ngzm6+YCimUzlVwusCtja2B0ZLEjT5kp3yw47J8zUDr064U2LJiq7CWlMRS/icZ/LktK5Gt3CQAjfA/lebtmbE1sLd13BrzrhA+lzc+ZjHeT0pcOGGmF5wiMqOJ7zKBAQnHGhj1Nh+bk25VmxraTWtCOJxhwUyGTkNOTYRp/p02Zak+yIpJM6gsqT0vSFLC3cVDfSSAqzu4VmZP2Z2/tqWR3S4wC4Gk540y5ZEqti0UE0/g== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1783499176; c=relaxed/relaxed; bh=pXAgQLPERGwooEzHznzvpg6SzocRRloWRn0CUVpxEzA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WLLFcJPeivuMoWmbfA6eL49JDOpgmXX+/hna2oWURnzBMsmcw6XhghLNfisJHrlk5sawj54tWadwagCVlS1kLWwufPorNu8F7frj05+xovdjWYNqWKlLFPDImrf9G8jlQYSt3dS0dBn/JVEY1pq4d1vUCj9Ne2ADqiU7mUM+DcCZ0Q3qZPRNSuseJ+kqVALPmMDg3jVk3uB/Cri+qmaCkRS6FAMqegvt9UdA72SP3EG9CxdMdDUImgh7H52vAHnYpXe10OXOtrWA9uaFwn7k0o8S0SgdwKia8N7FBeTflDPbI3QXnhj+WSx10l9CQbYUVnEx2ZLmJ4GMoB0k9sqdNg== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=hVBSzzLB; dkim-atps=neutral; spf=pass (client-ip=2607:f8b0:4864:20::52f; helo=mail-pg1-x52f.google.com; envelope-from=mkchauras@gmail.com; receiver=lists.ozlabs.org) smtp.mailfrom=gmail.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=hVBSzzLB; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::52f; helo=mail-pg1-x52f.google.com; envelope-from=mkchauras@gmail.com; receiver=lists.ozlabs.org) Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4gwB536jDxz30BH for ; Wed, 08 Jul 2026 18:26:15 +1000 (AEST) Received: by mail-pg1-x52f.google.com with SMTP id 41be03b00d2f7-c88a4d79ba5so226479a12.2 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=lists.ozlabs.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=hVBSzzLBqm0tG+6uXpgXzCW6z07BdTiTI7Cp2sEyi6boEon2VpQZw5g26TR6oThkX0 h7jVGOMIDV4F9369cUaSYWLRRbl08B8L/9Hp5js3OOUlAafhnuz6OeSWhXazOvBy2Pfc mPK+gJMF8D3SqystxJ7Gb1S6H9mxlKUYv1b8+UhjFD4+3vE4zRTXDbu25MSbZc+pb9xs TgQ0HtiuFAY5Qj9PtcvqPJuCI0mzpsy6Qtwojak1JKWtGu73T0pe9/Q63GhXB0yHQ2B/ hu/EV0FiZ2R9mH7Gx5/X7BsQQzZsTN6TabuGYhJgx/u270WXB6jbvbaM1RYwaTIkdVBe Eg8w== 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=UD43d7H0b5Xn48LtUOAkqaUPJwh2hKz+FZ0tDW+KZYf1ecIXQiHs/QVdhqqKKWcb4o HLo+uESX8wJBFqm9QOYehCcK8HYf6lyqtltV/zyLyC/dkOACSh/9gQVDuMItahY7p/Cz 6kfxE2bDcptCsMzDr/ORAJITLljxTa1QAGRRhr7jgyhsp6gQBUWvqb3Y/Y/L2rwXCXBX Tjy7OAUhiao5xm00su/4ffJ1y7gkZ0f6FvMBloLe57cAnQHclMgzlL4oJnp2JOXf/UhW 7njLiBSjW/YSkRPuvkI4cDznWgf9xmARyUfbPkG6FlPT+pg3JJk6csZzzqlJYaCEcXaz a2bQ== X-Forwarded-Encrypted: i=1; AHgh+Roe5Rx528+ThgEbX2TKzoVM9XYym89uJIoxLo/EbhRpZrKENlYGPM2JVLSrVfKJNVw6jG5/CIV73M2uZJE=@lists.ozlabs.org X-Gm-Message-State: AOJu0YzPnh1CYdmzV8sNiBfpp6DB7vmk2BIGQ3QinAjccR1g27a/tP8V kd2GLi6DVOwez+mj100eKZnIUao1WDgSn6vwgKMxdkSb1kvSKelFmOWh X-Gm-Gg: AfdE7cmM+3nRB+Awa0GTQMTCtUBNMzl2NsOiB+pp2HpFA27lCgjhe4YMpQYyaBAJFPN tInKSKUBDH6bM18nMnVClLTW/86ZGlOblqErrHMgzNKVOIrUpwYx6usaUqc5FOjZzTN3AiZCFOX 9qOEmoJEgLgrQmq8z1Osc6Z9D4UgSqcrfpJ9GqZEuHaT4UVoadvVpPCX5OUX8r+OdhkhOwqJy65 gt1pIAAbUX9+MTOb3MOy5Do0t7gEqUOC3Cr2kR7XMP0RwR2nEtGGZ5EeioMxdMUhrn0+LmhBjbp KbenSv4rtD4HfthnLpwBhMWg1OfY5175Vp3GjlRKNWnikROXZLuZMd0AAKbZbClTLVIj6sJgCrb YUIn/fsQD+2CQRR9MR3Ko6n+hS52GijoY1CvPSfna0T0pGtH1f6PAk5haEDZ/ng1vwgXbfUTPip UOgGoxMbTPcHHEepyz/rNkI67WwSUwzucxxeIPjv5CbjXdjJmhN/MhZmOSJ1AxW+qqUA== 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> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list 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