From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755868AbcBBRXq (ORCPT ); Tue, 2 Feb 2016 12:23:46 -0500 Received: from casper.infradead.org ([85.118.1.10]:59958 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751779AbcBBRXp (ORCPT ); Tue, 2 Feb 2016 12:23:45 -0500 User-Agent: K-9 Mail for Android In-Reply-To: <20160202064433.GG6719@linux.vnet.ibm.com> References: <20160127145421.GT6357@twins.programming.kicks-ass.net> <20160127152158.GJ2390@arm.com> <20160127233836.GQ4503@linux.vnet.ibm.com> <20160128095718.GC30928@arm.com> <20160128223131.GV4503@linux.vnet.ibm.com> <20160129095958.GA4541@arm.com> <20160129102253.GG4503@linux.vnet.ibm.com> <20160201135621.GD6828@arm.com> <20160202035458.GF6719@linux.vnet.ibm.com> <20160202051904.GC1239@fixme-laptop.cn.ibm.com> <20160202064433.GG6719@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: [RFC][PATCH] mips: Fix arch_spin_unlock() From: Peter Zijlstra Date: Tue, 02 Feb 2016 18:23:37 +0100 To: paulmck@linux.vnet.ibm.com, Boqun Feng CC: Will Deacon , "Maciej W. Rozycki" , David Daney , =?ISO-8859-1?Q?M=E5ns_Rullg=E5rd?= , Ralf Baechle , linux-kernel@vger.kernel.org, torvalds@linux-foundation.org Message-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2 February 2016 07:44:33 CET, "Paul E. McKenney" wrote: > >> If so, do we also need to take the following pairing into >consideration? >> >> o smp_store_release() -> READ_ONCE(); if ;smp_rmb(); We rely on this with smp_cond_aquire() to extend the chain. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.