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 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 04A5AC43603 for ; Fri, 20 Dec 2019 12:35:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C8FB624680 for ; Fri, 20 Dec 2019 12:35:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727381AbfLTMfb (ORCPT ); Fri, 20 Dec 2019 07:35:31 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:51326 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727269AbfLTMfb (ORCPT ); Fri, 20 Dec 2019 07:35:31 -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-53-mHZeSO_DN06nS6FxGvPlkg-1; Fri, 20 Dec 2019 12:35:28 +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; Fri, 20 Dec 2019 12:35:27 +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; Fri, 20 Dec 2019 12:35:27 +0000 From: David Laight To: 'Brian Gerst' CC: Andy Lutomirski , X86 ML , LKML , Ingo Molnar , "H . Peter Anvin" , Boris Ostrovsky , "Oleg Nesterov" Subject: RE: [PATCH] x86: Remove force_iret() Thread-Topic: [PATCH] x86: Remove force_iret() Thread-Index: AQHVtuhWtS7aVpT6VkyrDyqz06b2R6fCyteggAAmZACAAAPDAA== Date: Fri, 20 Dec 2019 12:35:27 +0000 Message-ID: References: <20191219115812.102620-1-brgerst@gmail.com> <431a146f6461402da61d09fff155f35b@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: mHZeSO_DN06nS6FxGvPlkg-1 X-Mimecast-Spam-Score: 0 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 RnJvbTogQnJpYW4gR2Vyc3QNCj4gU2VudDogMjAgRGVjZW1iZXIgMjAxOSAxMjoxOA0KLi4uDQo+ ID4gSXMgaXQgZXZlciBwb3NzaWJsZSBmb3IgYW55IG9mIHRoZSBzZWdtZW50IHJlZ2lzdGVycyB0 byByZWZlciB0byB0aGUgTERUDQo+ID4gYW5kIGZvciBhbm90aGVyIHRocmVhZCB0byBpbnZhbGlk YXRlIHRoZSBlbnRyaWVzICd2ZXJ5IGxhdGUnID8NCj4gPiBTbyBldmVuIHRob3VnaCB0aGUgdmFs dWVzIHdlcmUgdmFsaWQgd2hlbiBjaGFuZ2VkLCB0aGV5IGFyZQ0KPiA+IGludmFsaWQgZHVyaW5n IHRoZSAncmV0dXJuIHRvIHVzZXInIHNlcXVlbmNlLg0KPiANCj4gTm90IGluIHRoZSBTWVNSRVQg Y2FzZSwgd2hlcmUgdGhlIGtlcm5lbCByZXF1aXJlcyB0aGF0IENTIGFuZCBTUyBhcmUNCj4gc3Rh dGljIHNlZ21lbnRzIGluIHRoZSBHRFQuICBBbnkgdXNlcnNwYWNlIGNvbnRleHQgdGhhdCB1c2Vz IExEVA0KPiBzZWdtZW50cyBmb3IgQ1MvU1MgbXVzdCByZXR1cm4gd2l0aCBJUkVULiAgVGhlcmUg aXMgZmF1bHQgaGFuZGxpbmcgZm9yDQo+IElSRVQgKGZpeHVwX2JhZF9pcmV0KCkpIGZvciB0aGlz IGNhc2UuDQoNCk9rIC0gSXQgaXMgYSBsb25nIHRpbWUgc2luY2UgaSBsb29rZWQgYXQgdGhlc2Ug J3N5c2NhbGwnIGluc3RydWN0aW9ucy4NCg0KLi4uDQo+ID4gSXMgaXQgYWN0dWFsbHkgY2hlYXBl ciB0byBwcm9wZXJseSB2YWxpZGF0ZSB0aGUgc2VnbWVudCByZWdpc3RlcnMsDQo+ID4gb3IgdGFr ZSB0aGUgJ2hpdCcgb2YgdGhlIHNsaWdodGx5IHNsb3dlciBJUkVUIHBhdGggYW5kIGdldCB0aGUg Y3B1DQo+ID4gdG8gZG8gaXQgZm9yIHlvdT8NCj4gDQo+IFNZU1JFVCBpcyBmYXN0ZXIgYmVjYXVz ZSBpdCBhdm9pZHMgc2VnbWVudCB0YWJsZSBsb29rdXBzIGFuZA0KPiBwZXJtaXNzaW9uIGNoZWNr cyBmb3IgQ1MgYW5kIFNTLiAgSXQgc2ltcGx5IHNldHMgdGhlIHNlbGVjdG9ycyB0bw0KPiB2YWx1 ZXMgc2V0IGluIGFuIE1TUiBhbmQgdGhlIGF0dHJpYnV0ZXMgKGJhc2UsIGxpbWl0LCBldGMuKSB0 byBmaXhlZA0KPiB2YWx1ZXMuICBJdCBpcyB1cCB0byB0aGUgT1MgdG8gbWFrZSBzdXJlIHRoZSBh Y3R1YWwgc2VnbWVudA0KPiBkZXNjcmlwdG9ycyBpbiBtZW1vcnkgbWF0Y2ggdGhvc2UgZGVmYXVs dCBhdHRyaWJ1dGVzLg0KDQpJIHdvbmRlciBob3cgbXVjaCBkaWZmZXJlbmNlIHRoYXQgbWFrZSB3 aGVuICdwYWdlIHRhYmxlIHNlcGFyYXRpb24nDQppcyB1c2VkPw0KDQpJIGd1ZXNzIHRoZSBsb2Fk aW5nIG9mIGRzL2VzL2ZzL2dzIGNhbiBmYXVsdCAtIGJ1dCB0aGF0IGl0IG5vIGhhcmRlcg0KdG8g aGFuZGxlIHRoYW4gaW4gdGhlIElSRVQgY2FzZS4NCg0KCURhdmlkDQoNCkFueXdheSwgb2ZmIHVu dGlsIHRoZSBuZXcgeWVhciBub3cuDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwg QnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVn aXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==