From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=192.198.163.9 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792598805; b=vv4ggf464hBVRj3bCeVNWLJ42TTakGhWpjyUGRP/5ZY3cD1oZ2TCg4TYbjpZng/5s2a5 pZN9QIu5VeTo44a8P68QbFj53F3JxGPVv1kgr6ZhG0VDYVeUnclXkr8pqVuFQedeejKwT cUqGhwryQmQ9c6AoNwN+cMfjGkdCCqHetmPSuEjyY22YMvfYiao8MS6sA1RwjGAJj1qah XjL+XKLooqCZ+f9YZ802fhI4WptsPIT9PA5f8aHbQxUQoXdyZ58oHXpsxJV6GJnWOkJR0 yZ2+jF54z5yfApyrbdGRLWzceP4VtFm6Mc39QpCduAImeIHvRP1Eyfsom8UwhlB/iHg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792598805; h=DMARC-Filter:DKIM-Signature:X-CSE-ConnectionGUID:X-CSE-MsgGUID: X-IronPort-AV:X-IronPort-AV:Received:X-CSE-ConnectionGUID: X-CSE-MsgGUID:X-ExtLoop1:X-IronPort-AV:Received:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To:Organization; bh=QQwdygHlH+crYwYHwqTCIWL0QUFIQa/RnwZs1b/1VmE=; b=2ydWMvyNl9Nko6yk9psu5zlKQP7pxOSVd/b5aWfQCIXtkxR9KGcGVH9JokrimKRjg1JU VUZ7qs7PDkXMUcKQM6ogBE/ijBHfIFQGqJBE/Zbw4+QpNfQgwqYxmw9f2twbfYRLNPKap qvtKYm7xSzDLgJO+HiZgSXXBBzPX45dVeuuwyHpEQekp6f0jCdAEEkV7N7Q6CVhNs5oWy Lr5A35I+wIjepu75zca4vRLKdBSmBghpnLU73nUNNduAMAqRtV71oCr+x7ZbMsfFlOCYF qIT571HBrqVV46IGeeTuHv6pHSssZxZuLJ0hwfreoL+/eZg4a2tncc2nFbJSLR/JwKg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=b0RH0OOz; arc=none smtp.remote-ip=192.198.163.9 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 58F26606A31D for ; Wed, 21 Oct 2026 16:06:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 58F26606A31D Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=b0RH0OOz DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792598804; x=1824134804; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=J+WlNwWuoKeWuCkyhVa4PdEgoH8gcbtu2lIDA8Fudik=; b=b0RH0OOz0nsbIMpjx1Gsj9cHIt9875YmX0+a4NTvFh7ob8KzfsRVkFer QIv7/I7Rz3H+wOvzaMtgJ7KCdcDRBIhPpJ5rple5UvWqp0tIldobum+1e Db3ZbSIKoDhgdyYwlei0pfqRV41tD1mGDX+dSlhlMEIBKpS5GJAzsYVuD dwZxj6girhdlypjOcUEJsZWfXPc38lLEmtZ5KtBLFCIa/Kq/oAXQ0378z C2C6xrDFtmJ7RK5slz5n9YUAuhiJscwR7xt4K/Qc1o/Nk2l4x/ed8oXFF t81UgIZn8seOf4NbWhJxzz8RR5HKJ8VdEwPlxVTnisYFJBuwD7e8VDMnc g==; X-CSE-ConnectionGUID: dnLa+27RSgaoTeB86+sqzg== X-CSE-MsgGUID: dp9GzKM2Q4CBhYTCJsLoAw== X-IronPort-AV: E=McAfee;i="6800,10657,11942"; a="1217846" X-IronPort-AV: E=Sophos;i="6.27,170,1787036400"; d="scan'208";a="1217846" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Oct 2026 09:06:43 -0700 X-CSE-ConnectionGUID: b0jlRbXyQhe9z6oqLooT4w== X-CSE-MsgGUID: A5Fw+wnpTgOb6I5YjIWx0g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,170,1787036400"; d="scan'208";a="3057252" Received: from cpetruta-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.245.24]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Oct 2026 09:06:43 -0700 Date: Wed, 21 Oct 2026 19:06:40 +0300 From: Andy Shevchenko To: Len Brown Cc: linux-pm@vger.kernel.org, Len Brown Subject: Re: [PATCH 07/18] x86_energy_perf_policy: Cleanup: Fix potential ratio overflow Message-ID: References: <48429f39fed0928a54620f2ae830d6395088f853.1792428130.git.len.brown@intel.com> X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48429f39fed0928a54620f2ae830d6395088f853.1792428130.git.len.brown@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo On Mon, Oct 19, 2026 at 12:43:28PM -0400, Len Brown wrote: > Prevent integer overflow in ratio_2_msr_perf() by using 64-bit > arithmetic for the intermediate multiplication calculation. I assume this even compiles on 32-bit due to __udivsi3 present in the compiler libraries. Reviewed-by: Andy Shevchenko -- With Best Regards, Andy Shevchenko