From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2752C3524D for ; Mon, 3 Feb 2020 16:05:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C3E8E20721 for ; Mon, 3 Feb 2020 16:05:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728614AbgBCQFa (ORCPT ); Mon, 3 Feb 2020 11:05:30 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:59674 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728293AbgBCQF3 (ORCPT ); Mon, 3 Feb 2020 11:05:29 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-142-hGwRv5yLP-WawD24haPXoA-1; Mon, 03 Feb 2020 16:05:26 +0000 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 3 Feb 2020 16:05:25 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Mon, 3 Feb 2020 16:05:25 +0000 From: David Laight To: 'Marco Elver' CC: Eric Dumazet , Peter Zijlstra , Will Deacon , Thomas Gleixner , "Paul E. McKenney" , the arch/x86 maintainers , LKML Subject: RE: Confused about hlist_unhashed_lockless() Thread-Topic: Confused about hlist_unhashed_lockless() Thread-Index: AQHV2Geqe/OiaqtIVUysR/GygGVY2agJoQ4ggAACp4CAAAKCMA== Date: Mon, 3 Feb 2020 16:05:25 +0000 Message-ID: <154c51cc385544789c9fa0b233fc76e7@AcuMS.aculab.com> References: <20200131164308.GA5175@willie-the-truck> <20200131184322.GA11457@worktop.programming.kicks-ass.net> <26258e70c35e4c108173a27317e64a0b@AcuMS.aculab.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: hGwRv5yLP-WawD24haPXoA-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogTWFyY28gRWx2ZXINCj4gU2VudDogMDMgRmVicnVhcnkgMjAyMCAxNTo1NQ0KPiANCj4g T24gTW9uLCAzIEZlYiAyMDIwIGF0IDE2OjQ1LCBEYXZpZCBMYWlnaHQgPERhdmlkLkxhaWdodEBh Y3VsYWIuY29tPiB3cm90ZToNCj4gPg0KPiA+IEZyb206IEVyaWMgRHVtYXpldA0KPiA+ID4gU2Vu dDogMzEgSmFudWFyeSAyMDIwIDE4OjUzDQo+ID4gPg0KPiA+ID4gT24gRnJpLCBKYW4gMzEsIDIw MjAgYXQgMTA6NDggQU0gRXJpYyBEdW1hemV0IDxlZHVtYXpldEBnb29nbGUuY29tPiB3cm90ZToN Cj4gPiA+ID4NCj4gPiA+DQo+ID4gPiA+IFRoaXMgaXMgbmljZSwgbm93IHdpdGggaGF2ZSBkYXRh X3JhY2UoKQ0KPiA+ID4gPg0KPiA+ID4gPiBSZW1lbWJlciB0aGVzZSBwYXRjaGVzIHdlcmUgc2Vu dCAyIG1vbnRocyBhZ28sIGF0IGEgdGltZSB3ZSB3ZXJlDQo+ID4gPiA+IHRyeWluZyB0byBzb3J0 IG91dCB0aGluZ3MuDQo+ID4gPiA+DQo+ID4gPiA+IGRhdGFfcmFjZSgpIHdhcyBtZXJnZWQgYSBm ZXcgZGF5cyBhZ28uDQo+ID4gPg0KPiA+ID4gV2VsbCwgYWN0dWFsbHkgZGF0YV9yYWNlKCkgaXMg bm90IHRoZXJlIHlldCBhbnl3YXkuDQo+ID4NCj4gPiBTaG91bGRuJ3QgaXQgYmUgTk9fREFUQV9S QUNFKCkgPz8NCj4gDQo+IFZhcmlvdXMgb3B0aW9ucyB3ZXJlIGNvbnNpZGVyZWQsIGFuZCBiYXNl ZCBvbiBmZWVkYmFjayBmcm9tIExpbnVzLA0KPiBkZWNpZGVkICdkYXRhX3JhY2UoLi4pJyBpcyB0 aGUgYmVzdCBvcHRpb246DQo+ICAgaHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvbGludXgtZnNkZXZl bC9DQUhrLQ0KPiA9d2c1Q2tPRUY4RFRlejFRdTBYVEVGd19vSGh4Tjk4YkRuRnFiWTdITDVBQjJn QG1haWwuZ21haWwuY29tLw0KPiANCj4gSXQncyBtZWFudCB0byBiZSBhcyB1bm9idHJ1c2l2ZSBh cyBwb3NzaWJsZSwgYW5kIGFuIGFsbC1jYXBzIG1hY3JvIHdhcw0KPiBydWxlZCBvdXQuDQoNCkV4 Y2VwdCB0aGF0IGl0IHRoZW4gbG9va3MgbGlrZSBzb21ldGhpbmcgdGhhdCBhY3R1YWxseSBkb2Vz IHNvbWV0aGluZy4NCg0KPiBTZWNvbmQsIHRoZSAiTk9fIiBwcmVmaXggd291bGQgYmUgaW5jb3Jy ZWN0LCBzaW5jZSBpdCdkIGJlIHRoZQ0KPiBvcHBvc2l0ZSBvZiB3aGF0IGl0IGlzLiBUaGUgbWFj cm8gaXMgbWVhbnQgdG8gZG9jdW1lbnQgYW5kIG1hcmsgYQ0KPiBkZWxpYmVyYXRlIGRhdGEgcmFj ZS4NCg0KSXQgc2hvdWxkIGJlIElHTk9SRV9EQVRBX1JBQ0UoKSB0aGVuLg0KDQoJRGF2aWQNCg0K LQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0s IE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdh bGVzKQ0K