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=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 E0ECBC433E2 for ; Wed, 2 Sep 2020 20:26:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8B9E208C7 for ; Wed, 2 Sep 2020 20:26:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726523AbgIBU0Q (ORCPT ); Wed, 2 Sep 2020 16:26:16 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:46597 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726226AbgIBU0O (ORCPT ); Wed, 2 Sep 2020 16:26:14 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-109-Mq2UCxw6M5Wqe5eU7V1Y6A-1; Wed, 02 Sep 2020 21:26:07 +0100 X-MC-Unique: Mq2UCxw6M5Wqe5eU7V1Y6A-1 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; Wed, 2 Sep 2020 21:26:06 +0100 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; Wed, 2 Sep 2020 21:26:06 +0100 From: David Laight To: 'Arvind Sankar' CC: Linus Torvalds , Miguel Ojeda , Sedat Dilek , Segher Boessenkool , Thomas Gleixner , Nick Desaulniers , "Paul E. McKenney" , Ingo Molnar , Arnd Bergmann , Borislav Petkov , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "H. Peter Anvin" , "Kirill A. Shutemov" , Kees Cook , Peter Zijlstra , Juergen Gross , Andy Lutomirski , Andrew Cooper , LKML , clang-built-linux , Will Deacon , "nadav.amit@gmail.com" , "Nathan Chancellor" Subject: RE: [PATCH v2] x86/asm: Replace __force_order with memory clobber Thread-Topic: [PATCH v2] x86/asm: Replace __force_order with memory clobber Thread-Index: AQHWgUNLrcDzK8wpBE22M0o9dUjAEKlVyhNQ Date: Wed, 2 Sep 2020 20:26:06 +0000 Message-ID: <41d1eec58dd54d878710cbb6121feecf@AcuMS.aculab.com> References: <20200823212550.3377591-1-nivedita@alum.mit.edu> <20200902153346.3296117-1-nivedita@alum.mit.edu> <20200902160828.GA3297881@rani.riverdale.lan> In-Reply-To: <20200902160828.GA3297881@rani.riverdale.lan> Accept-Language: en-GB, 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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQXJ2aW5kIFNhbmthcg0KPiBTZW50OiAwMiBTZXB0ZW1iZXIgMjAyMCAxNzowOA0KPiAN Cj4gT24gV2VkLCBTZXAgMDIsIDIwMjAgYXQgMTE6MzM6NDZBTSAtMDQwMCwgQXJ2aW5kIFNhbmth ciB3cm90ZToNCj4gPiBGaXggdGhpcyBieToNCj4gPiAtIFVzaW5nIGEgbWVtb3J5IGNsb2JiZXIg Zm9yIHRoZSB3cml0ZSBmdW5jdGlvbnMgdG8gYWRkaXRpb25hbGx5IHByZXZlbnQNCj4gPiAgIGNh Y2hpbmcvcmVvcmRlcmluZyBtZW1vcnkgYWNjZXNzZXMgYWNyb3NzIENSbiB3cml0ZXMuDQo+ID4g LSBVc2luZyBhIGR1bW15IGlucHV0IG9wZXJhbmQgd2l0aCBhbiBhcmJpdHJhcnkgY29uc3RhbnQg YWRkcmVzcyBmb3IgdGhlDQo+ID4gICByZWFkIGZ1bmN0aW9ucywgaW5zdGVhZCBvZiBhIGdsb2Jh bCB2YXJpYWJsZS4gVGhpcyB3aWxsIHByZXZlbnQgcmVhZHMNCj4gPiAgIGZyb20gYmVpbmcgcmVv cmRlcmVkIGFjcm9zcyB3cml0ZXMsIHdoaWxlIGFsbG93aW5nIG1lbW9yeSBsb2FkcyB0byBiZQ0K PiA+ICAgY2FjaGVkL3Jlb3JkZXJlZCBhY3Jvc3MgQ1JuIHJlYWRzLCB3aGljaCBzaG91bGQgYmUg c2FmZS4NCj4gPg0KPiANCj4gQW55IHRob3VnaHRzIG9uIHdoZXRoZXIgRk9SQ0VfT1JERVIgaXMg d29ydGggaXQganVzdCBmb3IgQ1JuPyBNU1JzIGRvbid0DQo+IHVzZSBpdCwgTmFkYXYgcG9pbnRl ZCBvdXQgdGhhdCBQS1JVIGRvZXNuJ3QgdXNlIGl0IChQS1JVIGRvZXNuJ3QgaGF2ZSBhDQo+IG1l bW9yeSBjbG9iYmVyIG9uIHdyaXRlIGVpdGhlcikuIEkgd291bGQgZ3Vlc3MgdGhhdCBtb3N0IG9m IHRoZSB2b2xhdGlsZQ0KPiBhc20gaGFzIG5vdCBiZWVuIHdyaXR0ZW4gd2l0aCB0aGUgYXNzdW1w dGlvbiB0aGF0IHRoZSBjb21waWxlciBtaWdodA0KPiBkZWNpZGUgdG8gcmVvcmRlciBpdCwgc28g cHJvdGVjdGluZyBqdXN0IENSbiBhY2Nlc3MgZG9lc24ndCBtaXRpZ2F0ZSB0aGUNCj4gaW1wYWN0 IG9mIHRoaXMgYnVnLg0KDQpJJ20gZ3Vlc3NpbmcgdGhhdCBfX2ZvcmNlX29yZGVyIG1lbW9yeSBy ZWZlcmVuY2Ugd2FzIGFkZGVkIGJlY2F1c2UNCnRoZSBjb21waWxlciBtYW5hZ2VkIHRvIHJlb3Jk ZXIgYSBwYXJ0aWN1bGFyIHBhaXIgb2YgYWNjZXNzZXMuDQoNCkhvd2V2ZXIgd3JpdGluZyB0byBz b21lIG9mIHRoZSBDUiAoYW5kIG1heWJlIE1TUikgaGFzIHNpZGUgZWZmZWN0cw0Kb24gb3RoZXIg bWVtb3J5IGFjY2Vzc2VzIC0gc28gc2hvdWxkIHJlYWxseSBoYXZlIGEgZnVsbCAibWVtb3J5IiBj bG9iYmVyLg0KDQpPVE9IIG5vbmUgb2YgdGhlIENSIG9yIE1TUiBhY2Nlc3MgYXJlIGNvbW1vbiwg YW5kIEkgc3VzcGVjdCBhIGxvdA0KYXJlIHNsb3cgdG8gZXhlY3V0ZSAoZXZlbiBpZiBub3QgYWN0 dWFsbHkgc2VyaWFsaXNpbmcpLg0KU28gYSAnYmVsdCBhbmQgYnJhY2VzJyAibWVtb3J5IiBjbG9i YmVyIHRoYXQgZGVmaW5pdGVseSBzdG9wcyB0aGUNCmNvbXBpbGVyIHJlLW9yZGVyaW5nIGluc3Ry dWN0aW9ucyBhY3Jvc3MgdGhlIGFjY2VzcyBhdm9pZHMNCmFueSBwb3NzaWJsZSB1bndhbnRlZCBl ZmZlY3RzLg0KDQpBZnRlciBhbGwsIGFueSBzdWNoIGNvZGUgaXMgcmVhbGx5ICdhc3NlbWJsZXIg d3JpdHRlbiBpbiBDJy4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lk ZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0K UmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==