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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF8C1C3DA7D for ; Tue, 3 Jan 2023 08:37:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236830AbjACIhy (ORCPT ); Tue, 3 Jan 2023 03:37:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232898AbjACIhv (ORCPT ); Tue, 3 Jan 2023 03:37:51 -0500 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FBC7D92 for ; Tue, 3 Jan 2023 00:37:50 -0800 (PST) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-91-9nkBtqfRMfet6_rK_0JW4A-2; Tue, 03 Jan 2023 08:37:47 +0000 X-MC-Unique: 9nkBtqfRMfet6_rK_0JW4A-2 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Tue, 3 Jan 2023 08:37:46 +0000 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.044; Tue, 3 Jan 2023 08:37:46 +0000 From: David Laight To: 'Linus Torvalds' CC: "Kirill A. Shutemov" , "Kirill A. Shutemov" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , "x86@kernel.org" , Kostya Serebryany , "Andrey Ryabinin" , Andrey Konovalov , Alexander Potapenko , Taras Madan , Dmitry Vyukov , "H . J . Lu" , "Andi Kleen" , Rick Edgecombe , Bharata B Rao , Jacob Pan , Ashok Raj , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCHv13 05/16] x86/uaccess: Provide untagged_addr() and remove tags before address check Thread-Topic: [PATCHv13 05/16] x86/uaccess: Provide untagged_addr() and remove tags before address check Thread-Index: AQHZHLDUcIP+F/h/PEiAwEZ6SoBjkq6LJK3ggABcQgCAAN3HwA== Date: Tue, 3 Jan 2023 08:37:46 +0000 Message-ID: <35b24dab4dc5451a86ef87f93088e0b7@AcuMS.aculab.com> References: <20221227030829.12508-1-kirill.shutemov@linux.intel.com> <20221227030829.12508-6-kirill.shutemov@linux.intel.com> <20221231001029.5nckrhtmwahb65jo@box> <4cf29f7a1a0041da818ac7ef598d142e@AcuMS.aculab.com> In-Reply-To: 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 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMDIgSmFudWFyeSAyMDIzIDE5OjA1DQouLi4N Cj4gPiBBcmUgYnl0ZSBsb2FkcyBndWFyYW50ZWVkIHRvIGZhdWx0Pw0KPiANCj4gWWVhaCwgd2Ug ZG9uJ3QgbWFwIHRoZSBoaWdoZXN0IGFkZHJlc3Mgb24geDg2LTY0LiBBbmQgd2UgZG9uJ3Qgd2Fu dCB0bw0KPiBpbiB0aGUgZnV0dXJlIGVpdGhlciwgYmVjYXVzZSBvZiBob3cgb3VyIGVycm9yIHBv aW50ZXJzIHdvcmsgKGllIGlmDQo+IHNvbWVib2R5IG1pc3NlcyBhbiAiSVNfRVJSKCkiIGNoZWNr IGFuZCB1c2VzIGFuIGVycm9yIHBvaW50ZXIgYXMgYQ0KPiBwb2ludGVyLCB3ZSB3YW50IHRoYXQg dG8gZmF1bHQsIHJhdGhlciB0aGFuIGRvIHJhbmRvbSB0aGluZ3MpLg0KPiANCj4gSXQncyBub3Qg YSBoYXJkIHJlcXVpcmVtZW50IGFyY2hpdGVjdHVyYWxseSAoZWl0aGVyIGhhcmR3YXJlIG9yDQo+ IHNvZnR3YXJlKSwgYW5kIGlpcmMgb24gMzItYml0IHdlIHVzZWQgdG8gdXNlIHRoZSBsYXN0IHZp cnR1YWwgcGFnZSBmb3INCj4gc29tZXRoaW5nLCBzbyBtYXliZSBJJ20gbWlzc2luZyBzb21lIG9k ZCB1c2Ugb24gNjQtYml0IHRvbywgYnV0DQo+IGFjY2Vzc2luZyB0aGUgdG9wLW9mLXZpcnR1YWwg YWRkcmVzcyBzcGFjZSBvbiB4ODYtNjQgc2hvdWxkIGFsd2F5cw0KPiBjYXVzZSBhIGNsZWFyIGZh dWx0IGFmYWlrLg0KPiANCj4gQSBieXRlIGFjY2VzcyB3b3VsZCBhbHdheXMgYmUgYSBwYWdlIGZh dWx0LCB3aGlsZSBhIHdyYXBwaW5nIGFjY2Vzcw0KPiBtaWdodCB0cmlnZ2VyIGEgR1AgZmF1bHQg Zmlyc3QgKHByb2JhYmx5IG5vdCAtIG9uIDMyLWJpdCBpdCB3b3VsZCBiZSBhDQo+IHNlZ21lbnQg c2l6ZSB2aW9sYXRpb24sIG9uIDY0LWJpdCB3ZSd2ZSBsZWZ0IHRob3NlIGJhZCBvbGQgZGF5cyBi ZWhpbmQNCj4gYW5kIEkgZG9uJ3QgdGhpbmsgd3JhcHBpbmcgbWF0dGVycyBlaXRoZXIpDQoNCkZv ciBzb21lIHJlYXNvbiBJIHdhcyB0aGlua2luZyB5b3Ugd2VyZSByZWx5aW5nIG9uIHRoZSB3cmFw cGluZyBhY2Nlc3MuDQoNClRoZSBvdGhlciBjaGVjayBpcyBhY2Nlc3Nfb2soKSBmb3IgbG9uZ2Vy IGNvcGllcy4NCklmIHlvdSBtYWtlIHRoZSBhc3N1bXB0aW9uIHRoYXQgdGhlIGNvcHkgaXMgJ3Jl YXNvbmFibHkgc2VxdWVudGlhbCcNCnRoZW4gdGhlIGxlbmd0aCBjYW4gYmUgaWdub3JlZCBwcm92 aWRlZCB0aGF0IHRoZSBib3R0b20gb2YgJ2tlcm5lbA0Kc3BhY2UnIGlzIHVubWFwcGVkLg0KRm9y IHg4Ni02NCB0cmVhdGluZyAtdmUgdmFsdWVzIGFzIGtlcm5lbCB0aGF0IGlzIHByZXR0eSB0cnVl Lg0KMzItYml0IHdvdWxkIG5lZWQgYXQgbGVhc3Qgb25lIHVubWFwcGVkIHBhZ2UgYmV0d2VlbiB1 c2VyIGFuZCBrZXJuZWwuDQpJIHN1c3BlY3QgdGhlIGtlcm5lbCBpcyBsb2FkZWQgYXQgMHhjMDAw MDAwMCBtYWtpbmcgdGhhdCBkaWZmaWN1bHQuDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFk ZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywg TUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=