From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754391AbaDNQTV (ORCPT ); Mon, 14 Apr 2014 12:19:21 -0400 Received: from terminus.zytor.com ([198.137.202.10]:47649 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752347AbaDNQTP (ORCPT ); Mon, 14 Apr 2014 12:19:15 -0400 Message-ID: <534C0A74.6030305@zytor.com> Date: Mon, 14 Apr 2014 09:19:00 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: "Chen, Gong" , tony.luck@intel.com CC: tglx@linutronix.de, mingo@kernel.org, linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org Subject: Re: [PATCH 2/2] x86, MCE: Cleanup macro __get_cpu_var References: <1397464777-25451-1-git-send-email-gong.chen@linux.intel.com> <1397464777-25451-2-git-send-email-gong.chen@linux.intel.com> In-Reply-To: <1397464777-25451-2-git-send-email-gong.chen@linux.intel.com> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/14/2014 01:39 AM, Chen, Gong wrote: > @@ -619,7 +619,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) > continue; > > v = &get_cpu_var(mce_polled_error); > - set_bit(0, v); > + *v = 1; > put_cpu_var(mce_polled_error); > /* > * Uncorrected or signalled events are handled by the exception The amazing thing is that you managed to miss the one place where you could actively elide a pointer. The above should simply be: this_cpu_write(mce_polled_error, 1); -hpa