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 62A17C433F5 for ; Tue, 25 Jan 2022 22:21:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233745AbiAYWVg (ORCPT ); Tue, 25 Jan 2022 17:21:36 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:39873 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233724AbiAYWVf (ORCPT ); Tue, 25 Jan 2022 17:21:35 -0500 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-2-fA7wWCh4Ow2lTbVV-GkDJQ-1; Tue, 25 Jan 2022 22:21:32 +0000 X-MC-Unique: fA7wWCh4Ow2lTbVV-GkDJQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.28; Tue, 25 Jan 2022 22:21:31 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.028; Tue, 25 Jan 2022 22:21:31 +0000 From: David Laight To: 'Aleksey Senin' , "linux-kernel@vger.kernel.org" Subject: RE: Using memcpy instead of copy_to_user. xprtrdma code. Thread-Topic: Using memcpy instead of copy_to_user. xprtrdma code. Thread-Index: AQHYEhYs6JOOV6I95k2rDCj4H0ySg6x0T4qw Date: Tue, 25 Jan 2022 22:21:31 +0000 Message-ID: <55b4da35b6e44bf48306280d900e0fa8@AcuMS.aculab.com> References: 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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com 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 RnJvbTogQWxla3NleSBTZW5pbiA8YWxla3NleS1saW51eC1rZXJuZWxAc2VuaW4ubmFtZT4NCj4g U2VudDogMjUgSmFudWFyeSAyMDIyIDE4OjA0DQo+IA0KPiBUaGlzIHNwZWNpZmljIHBhdGNoIC0g IC0gaW1wbGVtZW50cyB1c2luZyBtZW1jcHkgaW5zdGVhZCBvZg0KPiBjb3B5X3RvX3VzZXIuIFdo eSBpcyBpdCBjb25zaWRlcmVkIHRvIGJlIHNhZmUgaW4gdGhpcyBzcGVjaWZpYyBjYXNlPw0KPiBB bGwgcmVhZGluZ3MgYWJvdXQgaG93IHRvIGNvcHkgZGF0YSBhcmUgbWVudGlvbmluZyB0byB1c2UN Cj4gY29weV90b191c2VyL2NvcHlfZnJvbV91c2VyLiBXaHkgdXNlIGRpcmVjdCBjb3B5IGhlcmU/ IFdoYXQgcHJldmVudHMNCj4gdGhlIGtlcm5lbCBmcm9tIGZhaWx1cmUgaWYgdGhlIHBhZ2UgaXMg bm90IHByZXNlbnQgb3IgZG9lc24ndCBoYXZlDQo+IHJlcXVpcmVkIGFjY2VzcyByaWdodHM/DQo+ IA0KPiBAQCAtMTAzLDggKzEwMiw4IEBAIHN0YXRpYyBpbnQgcmVhZF9yZXNldF9zdGF0KHN0cnVj dCBjdGxfdGFibGUNCj4gKnRhYmxlLCBpbnQgd3JpdGUsDQo+ICAgICAgICAgICAgICAgICBsZW4g LT0gKnBwb3M7DQo+ICAgICAgICAgICAgICAgICBpZiAobGVuID4gKmxlbnApDQo+ICAgICAgICAg ICAgICAgICAgICAgICAgIGxlbiA9ICpsZW5wOw0KPiAtICAgICAgICAgICAgICAgaWYgKGxlbiAm JiBjb3B5X3RvX3VzZXIoYnVmZmVyLCBzdHJfYnVmLCBsZW4pKQ0KPiAtICAgICAgICAgICAgICAg ICAgICAgICByZXR1cm4gLUVGQVVMVDsNCj4gKyAgICAgICAgICAgICAgIGlmIChsZW4pDQo+ICsg ICAgICAgICAgICAgICAgICAgICAgIG1lbWNweShidWZmZXIsIHN0cl9idWYsIGxlbik7DQo+IA0K PiBSZWZlcmVuY2UgdG8gdGhlIHNwZWNpZmljIHBhdGNoIGluIHRoZSBzZXJ2aWNlcyBvZiBjb21t aXRzOg0KPiBodHRwczovL2xrbWwub3JnL2xrbWwvMjAyMC80LzE3LzYwDQoNClJlYWQgdGhlIGNv bW1pdCBtZXNzYWdlLg0KDQo+IA0KPiBDb21taXQgaXRzZWxmOg0KPiAzMjkyNzM5M2RjMWNjZDYw ZmIyYmRjMDViOWU4ZTg4NzUzNzYxNDY5DQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lk ZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0K UmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==