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 7D9CFC43331 for ; Sun, 29 Mar 2020 17:41:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 57B3520714 for ; Sun, 29 Mar 2020 17:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728448AbgC2RlR (ORCPT ); Sun, 29 Mar 2020 13:41:17 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:36204 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727933AbgC2RlR (ORCPT ); Sun, 29 Mar 2020 13:41:17 -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-69-rWJvp-xpNwCNUPO9Bg3Gnw-1; Sun, 29 Mar 2020 18:41:13 +0100 X-MC-Unique: rWJvp-xpNwCNUPO9Bg3Gnw-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; Sun, 29 Mar 2020 18:41:12 +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; Sun, 29 Mar 2020 18:41:12 +0100 From: David Laight To: 'Andy Lutomirski' , Ingo Molnar CC: Al Viro , Linus Torvalds , Thomas Gleixner , X86 ML , LKML , Borislav Petkov Subject: RE: [RFC][PATCH 01/22] x86 user stack frame reads: switch to explicit __get_user() Thread-Topic: [RFC][PATCH 01/22] x86 user stack frame reads: switch to explicit __get_user() Thread-Index: AQHWBeo2BuGXOsXgxk+vqOM7n5IKaahf05lg Date: Sun, 29 Mar 2020 17:41:12 +0000 Message-ID: <489c9af889954649b3453e350bab6464@AcuMS.aculab.com> References: <20200323183620.GD23230@ZenIV.linux.org.uk> <20200323183819.250124-1-viro@ZenIV.linux.org.uk> <20200328104857.GA93574@gmail.com> <20200328115936.GA23230@ZenIV.linux.org.uk> <20200329092602.GB93574@gmail.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-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 RnJvbTogQW5keSBMdXRvbWlyc2tpDQo+IFNlbnQ6IDI5IE1hcmNoIDIwMjAgMTc6NTENCi4uDQo+ IE15IGluY2xpbmlhdGlvbiBpcyB0byBqdXN0IGdldCByaWQgb2YgdGhlIF9fZ2V0X3VzZXIoKS1z dHlsZSBBUElzLg0KPiBUaGVyZSBzaG91bGRuJ3QgYmUgYW55IF9fZ2V0X3VzZXIoKSBjYWxscyB0 aGF0IGNhbid0IGJlIGRpcmVjdGx5DQo+IHJlcGxhY2VkIGJ5IGdldF91c2VyKCksIGFuZCBhIHNp bmdsZSBpbnRlZ2VyIGNvbXBhcmlzb24gaXMgbm90IHRoYXQNCj4gZXhwZW5zaXZlLiAgT24gU01B UCBzeXN0ZW1zLCB0aGUgc3BlZWR1cCBvZiBfX2dldF91c2VyIHZzIGdldF91c2VyIGlzDQo+IG5l Z2xpZ2libGUuDQoNCk9uIHg4Ni02NCAoYXQgbGVhc3QpIF9fZ2V0X3VzZXIoKSBpcyBpbmxpbmVk IGJ1dCBnZXRfdXNlcigpIGlzbid0Lg0KU2luY2UgZ2V0X3VzZXIoKSBoYXMgdG8gcmV0dXJuIHR3 byB2YWx1ZXMsIG9uZSB3aWxsIGFsd2F5cyBiZQ0KYSAodXN1YWxseSkgb24tc3RhY2sgcmVhbCBt ZW1vcnkgbG9jYXRpb24gcmF0aGVyIHRoYW4gYSByZWdpc3Rlci4NCkZvciBmcmVxdWVudGx5IHVz ZSBjb2RlIHBhdGhzIHRoaXMgbWF5IGJlIG1lYXN1cmFibGUuDQpJJ20gdGhpbmtpbmcgb2YgdGhp bmdzIGxpa2UgZXBvbGxfd2FpdCgpIHdyaXRpbmcgb3V0IGV2ZW50cy4NCihhbHRob3VnaCB0aGF0 IGlzIGEgcHV0X3VzZXIoKSBsb29wLi4uKQ0KDQpJdCBtYXkgYmUgd29ydGggaW1wbGVtZW50aW5n IGdldF91c2VyKCkgYXMgYW4gaW5saW5lDQpmdW5jdGlvbiB0aGF0IHdyaXRlcyB0aGUgcmVzdWx0 IG9mIGFjY2Vzc19vaygpIHRvIGENCidieSByZWZlcmVuY2UnIHBhcmFtZXRlciBhbmQgdGhlbiBy ZXR1cm5zIHRoZSB2YWx1ZQ0KZnJvbSBhbiAncmVhbCcgX19nZXRfdXNlcigpIGZ1bmN0aW9uLg0K VGhlIGNvbXBpbGVyIHdpbGwgdGhlbiBvcHRpbWlzZSBhd2F5IHRoZSBtZW1vcnkgcmVmZXJlbmNl Lg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJv YWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24g Tm86IDEzOTczODYgKFdhbGVzKQ0K