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 37FBCC41513 for ; Thu, 17 Aug 2023 15:17:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353048AbjHQPQ5 (ORCPT ); Thu, 17 Aug 2023 11:16:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353136AbjHQPQs (ORCPT ); Thu, 17 Aug 2023 11:16:48 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0098106 for ; Thu, 17 Aug 2023 08:16:46 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-220-eGokBTGGPKySjKBRyhfXcw-1; Thu, 17 Aug 2023 16:16:44 +0100 X-MC-Unique: eGokBTGGPKySjKBRyhfXcw-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Thu, 17 Aug 2023 16:16:40 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Thu, 17 Aug 2023 16:16:40 +0100 From: David Laight To: 'Linus Torvalds' CC: David Howells , Al Viro , Jens Axboe , Christoph Hellwig , "Christian Brauner" , Matthew Wilcox , "Jeff Layton" , "linux-fsdevel@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH v3 2/2] iov_iter: Don't deal with iter->copy_mc in memcpy_from_iter_mc() Thread-Topic: [PATCH v3 2/2] iov_iter: Don't deal with iter->copy_mc in memcpy_from_iter_mc() Thread-Index: AQHZ0DpP/l59sWTPXU+UuQ9VGbJikq/s16Kg///6foCAACRpIIAA7PpbgABGFYCAAFYcAIAAGHiw Date: Thu, 17 Aug 2023 15:16:40 +0000 Message-ID: <2190704172a5458eb909c9df59b6a556@AcuMS.aculab.com> References: <03730b50cebb4a349ad8667373bb8127@AcuMS.aculab.com> <20230816120741.534415-1-dhowells@redhat.com> <20230816120741.534415-3-dhowells@redhat.com> <608853.1692190847@warthog.procyon.org.uk> <3dabec5643b24534a1c1c51894798047@AcuMS.aculab.com> <665724.1692218114@warthog.procyon.org.uk> 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-block@vger.kernel.org RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogVGh1cnNkYXksIEF1Z3VzdCAxNywgMjAyMyAz OjM4IFBNDQo+IA0KPiBPbiBUaHUsIDE3IEF1ZyAyMDIzIGF0IDEwOjQyLCBEYXZpZCBMYWlnaHQg PERhdmlkLkxhaWdodEBhY3VsYWIuY29tPiB3cm90ZToNCj4gPg0KPiA+IEFsdGhvdWdoIEknbSBu b3Qgc3VyZSB0aGUgYml0LWZpZWxkcyByZWFsbHkgaGVscC4NCj4gPiBUaGVyZSBhcmUgOCBieXRl cyBhdCB0aGUgc3RhcnQgb2YgdGhlIHN0cnVjdHVyZSwgbWlnaHQgYXMgd2VsbA0KPiA+IHVzZSB0 aGVtIDotKQ0KPiANCj4gQWN0dWFsbHnDpyBJIHdyb3RlIHRoZSBwYXRjaCB0aGF0IHdheSBiZWNh dXNlIGl0IHNlZW1zIHRvIGltcHJvdmUgY29kZQ0KPiBnZW5lcmF0aW9uLg0KPiANCj4gVGhlIGJp dGZpZWxkcyBhcmUgZ2VuZXJhbGx5IGFsbCBzZXQgdG9nZXRoZXIgYXMganVzdCBwbGFpbiBvbmUt dGltZQ0KPiBjb25zdGFudHMgYXQgaW5pdGlhbGl6YXRpb24gdGltZSwgYW5kIGdjYyBzZWVzIHRo YXQgaXQncyBhIGZ1bGwgYnl0ZQ0KPiB3cml0ZS4NCg0KSSd2ZSBqdXN0IHNwZW50IHRvbyBsb25n IG9uIGdvZGJvbHQgKGFnYWluKSA6LSkNCkZpZGRsaW5nIHdpdGg6DQoNCiNkZWZpbmUgdDEgdW5z aWduZWQgY2hhcg0Kc3RydWN0IGIgew0KICAgIHQxIGIxOjc7DQogICAgdDEgYjI6MTsNCn07DQoN CnZvaWQgZmYoc3RydWN0IGIgKixpbnQpOw0KDQp2b2lkIGZmMSh2b2lkKQ0Kew0KICAgIHN0cnVj dCBiIGIgPSB7LmIxPTMsIC5iMiA9IDF9Ow0KICAgIGZmKCZiLCBzaXplb2YgYik7DQp9DQoNCmdj YyBmb3IgeDg2LTY0IG1ha2UgYSBwaWdzLWJyZWFrZmFzdCB3aGVuIHRoZSBiaXRmaWVsZHMgYXJl ICdjaGFyJw0KYW5kIGxvYWRzIHRoZSBjb25zdGFudCBmcm9tIG1lbW9yeSB1c2luZyBwYy1yZWxh dGl2ZSBhY2Nlc3MuDQpPdGhlcndpc2UgcHJldHR5IG11c3QgYWxsIHZhcmlhbnRzICh3aXRoIG9y IHdpdGhvdXQgdGhlIGJpdGZpZWxkKQ0KZ2V0IGluaXRpYWxpc2VkIGluIGEgc2luZ2xlIHdyaXRl Lg0KKEFsdGhvdWdoIGdjYyBzZWVtcyB0byBpbnNpc3Qgb24gbG9hZGluZyBhIDMyYml0IGNvbnN0 YW50IGludG8gJWVheC4pDQoNCkkgY2FuIHdlbGwgaW1hZ2luZSB0aGF0IGtlZXBpbmcgdGhlIGNv bnN0YW50IGJlbG93IDMyNzY4IHdpbGwgaGVscA0Kb24gYXJjaGl0ZWN0dXJlcyB0aGF0IGhhdmUg dG8gY29uc3RydWN0IGxhcmdlIGNvbnN0YW50cy4NCg0KPiBBbmQgdGhlIHJlYXNvbiAnZGF0YV9z b3VyY2UnIGlzIG5vdCBhIGJpdGZpZWxkIGlzIHRoYXQgaXQncyBub3QNCj4gYSBjb25zdGFudCBh dCBpb3ZfaXRlciBpbml0IHRpbWUgKGl0J3MgYW4gYXJndW1lbnQgdG8gYWxsIHRoZSBpbml0DQo+ IGZ1bmN0aW9ucyksIHNvIGhhdmluZyB0aGF0IG9uZSBhcyBhIHNlcGFyYXRlIGJ5dGUgYXQgaW5p dCB0aW1lIGlzIGdvb2QNCj4gZm9yIGNvZGUgZ2VuZXJhdGlvbiB3aGVuIHlvdSBkb24ndCBuZWVk IHRvIG1hc2sgYml0cyBvciBhbnl0aGluZyBsaWtlDQo+IHRoYXQuDQo+IA0KPiBBbmQgb25jZSBp bml0aWFsaXplZCwgaGF2aW5nIHRoaW5ncyBiZSBkZW5zZSBhbmQgZG9pbmcgYWxsIHRoZQ0KPiBj b21wYXJlcyB3aXRoIGEgYml0d2lzZSAnYW5kJyBpbnN0ZWFkIG9mIGRvaW5nIHRoZW0gYXMgc29t ZSB2YWx1ZQ0KPiBjb21wYXJlIGFnYWluIHRlbmRzIHRvIGdlbmVyYXRlIGdvb2QgY29kZS4NCj4g DQo+IFRoZW4gYmVpbmcgYWJsZSB0byB0ZXN0IG11bHRpcGxlIGJpdHMgYXQgdGhlIHNhbWUgdGlt ZSBpcyBqdXN0IGdyYXZ5DQo+IG9uIHRvcCBvZiB0aGF0IChpZSB0aGF0IHdob2xlICJyZW1vdmUg dXNlcl9iYWNrZWQsIGJlY2F1c2UgaXQncyBlYXNpZXINCj4gdG8ganVzdCB0ZXN0IHRoZSBiaXQg Y29tYmluYXRpb24iKS4NCg0KSW5kZWVkLCB0aGV5IHVzZWQgdG8gYmUgYml0cyBidXQgbmV2ZXIg Z290IHRlc3RlZCB0b2dldGhlci4NCg0KPiA+IE9UT0ggdGhlICdub2ZhdWx0JyBhbmQgJ2NvcHlf bWMnIGZsYWdzIGNvdWxkIGJlIHB1dCBpbnRvIG11Y2gNCj4gPiBoaWdoZXIgYml0cyBvZiBhIDMy Yml0IHZhbHVlLg0KPiANCj4gT25jZSB5b3Ugc3RhcnQgZG9pbmcgdGhhdCwgeW91IG9mdGVuIGdl dCBiaWdnZXIgY29uc3RhbnRzIGluIHRoZSBjb2RlIHN0cmVhbS4NCg0KSSB3YXNuJ3QgdGhpbmtp bmcgb2YgdXNpbmcgJ3JlYWxseSBiaWcnIHZhbHVlcyA6LSkNCkV2ZW4gMzI3NjggY2FuIGJlIGFu IGlzc3VlIGJlY2F1c2Ugc29tZSBjcHUgc2lnbiBleHRlbmQgYWxsIGNvbnN0YW50cy4NCg0KCURh dmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3Vu dCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3 Mzg2IChXYWxlcykNCg==