From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f48.google.com (mail-wm1-f48.google.com [209.85.128.48]) (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 C44801D9A54 for ; Thu, 26 Mar 2026 02:00:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774490429; cv=none; b=GmkyPuPEHcGqt+AbO25tS0/5brOEZiloaUpIk1uTr92HitseJBg/3oHYUOIi9zGE6sne0OHPzeullbP3CXfGUt21/91LasvvrcZqwrnyXeO/xFsqyzWmxnFM32hiIkuh9Ej+NFnsXU1k009RyV1cQmYYMhxRBVFUgvuMzCgXRwM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774490429; c=relaxed/simple; bh=RfijQGsKWUEkGdgHfWsVT1ZhVP2PeputQJ9VXpu31nw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=d1DRtq8Q6jqyETgVHhJU5obwsTAxMwaeu8BxYzufgWynl/49wfGeKugJZo9mUFd9sk+Zglcsd79OihnGohLCo+6YGil/8hn2bUhbhBnFTEaQo0ZyNCD5aCQsFowwanBluAdgCAi6rGCnigNcUAYYjRgFUa+or2Djs7dJd03NqQw= 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=jpj5ctjF; arc=none smtp.client-ip=209.85.128.48 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="jpj5ctjF" Received: by mail-wm1-f48.google.com with SMTP id 5b1f17b1804b1-4852b81c73aso4184005e9.3 for ; Wed, 25 Mar 2026 19:00:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1774490426; x=1775095226; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=uhbkdLidpODGTRsYmLRF0FS3n+wDOfvaXSzlGywSvfg=; b=jpj5ctjFPZaj9H6LLVDzUgyNEThHIOeQvBsaFa7xuuWc3a/lWsuUZhEmiKb8gnLAeW KE3eLRRD2yAOdLM4dm2Zgb2ozn4NvRNsWk1WlTr9opooe8wDD9DzuHHDUbUUCFrV1FKh 5SSqoRvP8M2IyqN8Sn7zy/ttnrD7eqsksxRElhtQvStAGAkXUdmk+VKYXJZpsOXnPzu4 rjMzxrfxj+zAI+FQfkxTW2IsrGz8Aqt9N4dazhq6kGv+QVVbYilPio1j7R0PFTyaiScH o87zC8Es2llo2IjIjd/AmTkWr2jKGoMeof/8E8iQ8UDRtvNPf8fGYrP7bSPFg1tQgv9x +Z2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774490426; x=1775095226; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=uhbkdLidpODGTRsYmLRF0FS3n+wDOfvaXSzlGywSvfg=; b=P8aLhU0cE+pMVeGs2+DV3w5ckMNb0ywnc+3wcTfxEJt5OV45ng0vxF13Fouz3skZzg tb2N84Yg4JDimJnxjq8V2piEozyOSS099S2OqXBKn4TynqK6iYZgjFaYobqhO9R75Jz+ 79p69O5WtiF6S8vAuLR2qSOqLECAZbScO8oZ0kP3djhN1i5ZbNh7DTYFlIjVdh+WC6e5 yRH2baGedWD6zed+im1UzToHYwVIiLTQLWiDrPLN5zgKdMuIXTAuCjAAnIuJjubQOJO6 22U77HjZDclkpU9NH6Cv4A6lAXnl/VOp/hza4kyMfSo1WMgfSkdqnH+y0kDHVGqHZinT 5Xdw== X-Forwarded-Encrypted: i=1; AJvYcCWErR05CxO2hRNcfJE36nc5ihKhDAF+CvMDC9Cm8FPasUaNWncL7yozN5wTlC8BRb2l2tSCEZvpLkyl0ew=@vger.kernel.org X-Gm-Message-State: AOJu0YyjHKhLil8tUPOrwQFLY4RU4Gm5u/6xiYJNwuXne34joLo8BJ6E AFh7MNusLt0OoARRRlQrmg/49O0EmEjo9sb2AzH07Ge/MDzA29yRG/J4 X-Gm-Gg: ATEYQzxGLWJ0os+AWdb6bjGvW0oktiRojVZqvWxMefTKQVioGy5N785W8DBu2tRo3xz uN8qCgQHgaQj5rG1avh478ZvieDhDJuxCm4bKRjHR+fOeHHfRkYxVGW0lJ8GClmhVHo3zMHtXSn C4SXJLrWOVcIAUSnah017VYCdBc8nKkhf1urLsES9+v8ADZKfSXzV2DJIhWpFHrdyE4iLBkFfcH E/yctQwcef35r6BNsFp9zl+QkbzUsv/JAIx4q9loe0FrQGjDZPVtlzoJDBJvDwYzoXATV3PJ8eX fRTnN0UdhUTMkHkPXu/n8vBpQynZESS/VyZDJoYF6ATXItbXj4bItslMkLt9GaDR1lQ/gZlHjbR hfmXh2zSACkdyFrCq8IqNSJPk1Qx+6RtVauMfXn75xRQ/8Nz97WfYknLSUEi5XNhPvJAtQh82qf qtCgXc0QreJDZbg6ZlSynQ+qiMvEMV5D5kMW1C4Y4UfjDybBU5H9Ii7MqRA3XR+Bs395rJ9oEo/ 17teKsiZ5mzdA== X-Received: by 2002:a05:600c:c4a6:b0:485:3dfc:57c with SMTP id 5b1f17b1804b1-48716042c15mr81428365e9.21.1774490425914; Wed, 25 Mar 2026 19:00:25 -0700 (PDT) Received: from [192.168.1.122] (cpc159313-cmbg20-2-0-cust161.5-4.cable.virginm.net. [82.0.78.162]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4871fb333fbsm33300625e9.3.2026.03.25.19.00.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Mar 2026 19:00:24 -0700 (PDT) Message-ID: Date: Thu, 26 Mar 2026 02:00:23 +0000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] [v2] net: sfc: avoid format string warning To: Arnd Bergmann , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Nathan Chancellor , Jeff Garzik , Ben Hutchings Cc: Arnd Bergmann , Nick Desaulniers , Bill Wendling , Justin Stitt , Brett Creeley , Breno Leitao , Kees Cook , netdev@vger.kernel.org, linux-net-drivers@amd.com, linux-kernel@vger.kernel.org, llvm@lists.linux.dev References: <20260325134557.3406655-1-arnd@kernel.org> Content-Language: en-GB From: Edward Cree In-Reply-To: <20260325134557.3406655-1-arnd@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 25/03/2026 13:45, Arnd Bergmann wrote: > From: Arnd Bergmann > > Three sfc drivers contain the same *_fill_test() function that takes > a format string argument that gets passed down to snprintf(), producing > a warning with clang-22: > > drivers/net/ethernet/sfc/falcon/ethtool.c:227:60: error: diagnostic behavior may be improved by adding > the 'format(printf, 7, 8)' attribute to the declaration of 'ef4_fill_test' [-Werror,-Wmissing-format-attribute] > 210 | snprintf(test_str, sizeof(test_str), test_format, test_id); > | ^ > drivers/net/ethernet/sfc/falcon/ethtool.c:210:13: note: 'ef4_fill_test' declared here > > Rework these to take a varargs based test_format that allows better > type checking and a non-varargs unit name that gets pre-filled by > the caller, so that the compiler can validate all format strings. > > Fixes: 3273c2e8c66a ("[netdrvr] sfc: sfc: Add self-test support") > Signed-off-by: Arnd Bergmann Reviewed-by: Edward Cree