From patchwork Wed Jun 2 03:04:09 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhao, Yakui" X-Patchwork-Id: 103690 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o5237E9O012398 for ; Wed, 2 Jun 2010 03:07:14 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757343Ab0FBDHN (ORCPT ); Tue, 1 Jun 2010 23:07:13 -0400 Received: from mga01.intel.com ([192.55.52.88]:50875 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757269Ab0FBDHN (ORCPT ); Tue, 1 Jun 2010 23:07:13 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga101.fm.intel.com with ESMTP; 01 Jun 2010 20:03:21 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,344,1272870000"; d="scan'208";a="803936119" Received: from yakui_zhao.sh.intel.com (HELO localhost.localdomain) ([10.239.13.23]) by fmsmga001.fm.intel.com with ESMTP; 01 Jun 2010 20:06:53 -0700 From: yakui.zhao@intel.com To: lenb@kernel.org Cc: linux-acpi@vger.kernel.org, Zhao Yakui , Venkatesh Pallipadi Subject: [PATCH] ACPI: Fix the incorrect calculation about C-state idle time Date: Wed, 2 Jun 2010 11:04:09 +0800 Message-Id: <1275447849-25761-1-git-send-email-yakui.zhao@intel.com> X-Mailer: git-send-email 1.5.4.5 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Wed, 02 Jun 2010 03:07:14 +0000 (UTC) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 2e8c27d..6b38a6b 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1022,7 +1022,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev, spin_unlock(&c3_lock); } kt2 = ktime_get_real(); - idle_time_ns = ktime_to_us(ktime_sub(kt2, kt1)); + idle_time_ns = ktime_to_ns(ktime_sub(kt2, kt1)); idle_time = idle_time_ns; do_div(idle_time, NSEC_PER_USEC);