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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 20DA9C55184 for ; Wed, 5 Aug 2026 01:00:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Date:Message-Id:From:Subject:Content-Transfer-Encoding:MIME-Version: Content-Type:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wDoFFK8k5YTxmRnKscMNyLZY+muzZHuYjeYkOMRXrgw=; b=V5XLbzOMmEfjlk9hKuXLp1PJvu v5u5kKUUEFz/cfz6Jhyy51SuxWodzbZof/2QNm2wqvMyE33n9o8BbHaP/b8ZWJLHOvT/huKMuqVre 4PqxivryV5u8BIAvqX5lU43YPr817v/QAT+ELLM1OZPRFXQSRtdxfG+U6Oamv+m9Ght5/JtaqTNVz YCjVThDDVgZNd4KTucjSzTdsiZaViwfdt4zlvwgEx3hxC/7CgKKIL+BKCyEiv5zRnP/6sloDGCF1Q N2G+OwxOb37ZANgXgA/eczfacAQClrrn9xoySzzmTZ1zAQMnuNFjTV9GRVj9cFCWj0r0m4SrncEk/ zhPgjJFw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrQ04-000000031oJ-330g; Wed, 05 Aug 2026 01:00:52 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrQ02-000000031nq-2uSD; Wed, 05 Aug 2026 01:00:50 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id E901843B31; Wed, 5 Aug 2026 01:00:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C92EE1F00A3A; Wed, 5 Aug 2026 01:00:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785891648; bh=wDoFFK8k5YTxmRnKscMNyLZY+muzZHuYjeYkOMRXrgw=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=RF85tYGhiHjm4uKEo6TkqefkpcwefKhKJq9/2Jlh8vaqy6UKnmGfglB6gY4WtX+RB g3uMxUym+TA80Pcie3lZ6/FjKqvM134zsd5ySqspot8vYK3oVDvkuBDe4F1MSjY1tP tMPfXZf/mLT6faoINwrYE9u3oeQ9vMaeKNi+Mf7xTdgwzWxcVDu0D9LfPQB8B7kzk+ 68TLfFuLW+eZN+heFN1zkWLtcThdT2/mT8CRfzjstHj2yfiRw0AQ0PhCK96/2NhUaw sCIgFltDMj64gGpqSTbyDwmm1oLoM2rC4m4979s7z3U5e68pfEagOi/MMH6AGxI9hP K6Y0lPpuZgGSw== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 5691F3926663; Wed, 5 Aug 2026 01:00:10 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net-next] net: airoha: fix ARRAY_SIZE() division by zero on UP builds From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178589160888.3856351.13210051056800049801.git-patchwork-notify@kernel.org> Date: Wed, 05 Aug 2026 01:00:08 +0000 References: <20260731-airoha-spinlock-array-fix-v1-1-863a7e239a5f@kernel.org> In-Reply-To: <20260731-airoha-spinlock-array-fix-v1-1-863a7e239a5f@kernel.org> To: Lorenzo Bianconi Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, nathan@kernel.org, ndesaulniers@google.com, morbo@google.com, justinstitt@google.com, horms@kernel.org, aleksander.lobakin@intel.com, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, llvm@lists.linux.dev, ojeda@kernel.org, lkp@intel.com X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hello: This patch was applied to netdev/net-next.git (main) by Jakub Kicinski : On Fri, 31 Jul 2026 17:47:38 +0200 you wrote: > airoha_alloc_gdm_device() initializes the txq_lock[] array iterating > over ARRAY_SIZE(dev->txq_lock). ARRAY_SIZE() expands to > sizeof(dev->txq_lock) / sizeof((dev->txq_lock)[0]), but on UP builds > (CONFIG_SMP unset, CONFIG_DEBUG_SPINLOCK unset) arch_spinlock_t is an > empty struct, so sizeof(spinlock_t) is zero and the expression is a > compile-time division by zero (undefined behavior), reported by clang > as "division by zero is undefined [-Wdivision-by-zero]". > > [...] Here is the summary with links: - [net-next] net: airoha: fix ARRAY_SIZE() division by zero on UP builds https://git.kernel.org/netdev/net-next/c/c509971352a6 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html