From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932441AbdJJPa4 (ORCPT ); Tue, 10 Oct 2017 11:30:56 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:47946 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932334AbdJJPax (ORCPT ); Tue, 10 Oct 2017 11:30:53 -0400 Date: Tue, 10 Oct 2017 08:30:47 -0700 From: "Paul E. McKenney" To: Tejun Heo Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, torvalds@linux-foundation.org, mark.rutland@arm.com, dhowells@redhat.com, linux-arch@vger.kernel.org, peterz@infradead.org, will.deacon@arm.com, Christoph Lameter Subject: Re: [PATCH RFC tip/core/rcu 05/15] percpu: READ_ONCE() now implies smp_read_barrier_depends() Reply-To: paulmck@linux.vnet.ibm.com References: <20171010001951.GA6476@linux.vnet.ibm.com> <1507594969-8347-5-git-send-email-paulmck@linux.vnet.ibm.com> <20171010140813.GK3301751@devbig577.frc2.facebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171010140813.GK3301751@devbig577.frc2.facebook.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 17101015-0024-0000-0000-000002E0799E X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007873; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000235; SDB=6.00929159; UDB=6.00467648; IPR=6.00709431; BA=6.00005632; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017475; XFM=3.00000015; UTC=2017-10-10 15:30:51 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17101015-0025-0000-0000-000045AF526B Message-Id: <20171010153047.GB3521@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-10-10_04:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1710100218 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 10, 2017 at 07:08:13AM -0700, Tejun Heo wrote: > On Mon, Oct 09, 2017 at 05:22:39PM -0700, Paul E. McKenney wrote: > > Because READ_ONCE() now implies smp_read_barrier_depends(), this commit > > removes the now-redundant smp_read_barrier_depends() following the > > READ_ONCE() in __ref_is_percpu(). > > > > Signed-off-by: Paul E. McKenney > > Cc: Tejun Heo > > Cc: Christoph Lameter > > Acked-by: Tejun Heo Thank you, applied! > Please feel free to route with other patches. If this should be > routed through the percpu tree, please let me know. This depends on some other not-yet-finalized patch series, so if you are OK with it, I will route them with that group of serieses. Thanx, Paul