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 B3851C433F5 for ; Tue, 1 Mar 2022 11:41:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234613AbiCALlw (ORCPT ); Tue, 1 Mar 2022 06:41:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43428 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229603AbiCALlu (ORCPT ); Tue, 1 Mar 2022 06:41:50 -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 ESMTP id C1412939B8 for ; Tue, 1 Mar 2022 03:41:09 -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-37-mgVLvuYEMc62HB_eDoossw-1; Tue, 01 Mar 2022 11:41:07 +0000 X-MC-Unique: mgVLvuYEMc62HB_eDoossw-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, 1 Mar 2022 11:41:06 +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, 1 Mar 2022 11:41:06 +0000 From: David Laight To: 'Christophe Leroy' , 'Segher Boessenkool' CC: "David S. Miller" , Jakub Kicinski , "netdev@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" , Russell King Subject: RE: [PATCH] net: Remove branch in csum_shift() Thread-Topic: [PATCH] net: Remove branch in csum_shift() Thread-Index: AQHYHyQqmTo4K/pb5UWdDmTfE7rfRayQxWFwgABxD4CAAIxicIAYqtUAgAAE/lCAAAowAIAABVwg Date: Tue, 1 Mar 2022 11:41:06 +0000 Message-ID: <10309fa64833418a980a8d950d037357@AcuMS.aculab.com> References: <7f16910a8f63475dae012ef5135f41d1@AcuMS.aculab.com> <20220213091619.GY614@gate.crashing.org> <476aa649389345db92f86e9103a848be@AcuMS.aculab.com> <9cdb4a5243d342efb562bc61d0c1bfcb@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 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 RnJvbTogQ2hyaXN0b3BoZSBMZXJveQ0KPiBTZW50OiAwMSBNYXJjaCAyMDIyIDExOjE1DQouLi4N Cj4gTG9va3MgbGlrZSBBUk0gYWxzbyBkb2VzIGJldHRlciBjb2RlIHdpdGggdGhlIGdlbmVyaWMg aW1wbGVtZW50YXRpb24gYXMNCj4gaXQgc2VlbXMgdG8gaGF2ZSBzb21lIGxvb2tpbmcgbGlrZSBj b25kaXRpb25hbCBpbnN0cnVjdGlvbnMgJ3Jvcm5lJyBhbmQNCj4gJ3N0cm5lJy4NCg0KSW4gYXJt MzIgKGFuZCBJIHRoaW5rIGFybTY0KSBldmVyeSBpbnN0cnVjdGlvbiBpcyBjb25kaXRpb25hbC4N Cg0KPiBzdGF0aWMgX19hbHdheXNfaW5saW5lIF9fd3N1bSBjc3VtX3NoaWZ0KF9fd3N1bSBzdW0s IGludCBvZmZzZXQpDQo+IHsNCj4gCS8qIHJvdGF0ZSBzdW0gdG8gYWxpZ24gaXQgd2l0aCBhIDE2 YiBib3VuZGFyeSAqLw0KPiAJaWYgKG9mZnNldCAmIDEpDQo+ICAgICAgMWQyODoJZTIxMDIwMDEg CWFuZHMJcjIsIHIwLCAjMQ0KPiAgICAgIDFkMmM6CWU1OGQzMDA0IAlzdHIJcjMsIFtzcCwgIzRd DQo+ICAgKiBAd29yZDogdmFsdWUgdG8gcm90YXRlDQo+ICAgKiBAc2hpZnQ6IGJpdHMgdG8gcm9s bA0KPiAgICovDQo+IHN0YXRpYyBpbmxpbmUgX191MzIgcm9yMzIoX191MzIgd29yZCwgdW5zaWdu ZWQgaW50IHNoaWZ0KQ0KPiB7DQo+IAlyZXR1cm4gKHdvcmQgPj4gKHNoaWZ0ICYgMzEpKSB8ICh3 b3JkIDw8ICgoLXNoaWZ0KSAmIDMxKSk7DQo+ICAgICAgMWQzMDoJMTFhMDM0NjMgCXJvcm5lCXIz LCByMywgIzgNCj4gICAgICAxZDM0OgkxNThkMzAwNCAJc3RybmUJcjMsIFtzcCwgIzRdDQo+IAlp ZiAodW5saWtlbHkoaW92X2l0ZXJfaXNfcGlwZShpKSkpDQoNClRoZXJlIGlzIGEgc3BhcmUgJ3N0 cicgdGhhdCBhIG1pbm9yIGNvZGUgY2hhbmdlIHdvdWxkDQpwcm9iYWJseSByZW1vdmUuDQpMaWtl bHkgbm90IGhlbHBlZCBieSByZWdpc3RlcnMgYmVpbmcgc3BpbGxlZCB0byBzdGFjay4NCg0KSVNU UiBhcm0zMiBoYXZpbmcgYSByZWFzb25hYmxlIG51bWJlciBvZiByZWdpc3RlcnMgYW5kIHRoZW4N CmEgd2hvbGUgbG9hZCBvZiB0aGVtIGJlaW5nIHN0b2xlbiBieSB0aGUgaW1wbGVtZW50YXRpb24u DQooSSdtIHN1cmUgSSByZW1lbWJlciBzdGFjayBsaW1pdCBhbmQgdGhyZWFkIGJhc2UuLi4pDQpT byB0aGUgY29tcGlsZXIgZG9lc24ndCBnZXQgdGhhdCBtYW55IHRvIHBsYXkgd2l0aC4NCg0KTm90 IHF1aXRlIGFzIGJhZCBhcyBuaW9zMiAtIHdoZXJlIHIyIGFuZCByMyBhcmUgJ3Jlc2VydmVkIGZv cg0KdGhlIGFzc2VtYmxlcicgKGFzIHRoZXkgcHJvYmFibHkgYXJlIG9uIE1JUFMpIGJ1dCB0aGUg bmlvczINCmFzc2VtYmxlciBkb2Vzbid0IGV2ZXIgbmVlZCB0byB1c2UgdGhlbSENCg0KPiAuLi4N Cj4gT2ssIHNvIHRoZSBzb2x1dGlvbiB3b3VsZCBiZSB0byBoYXZlIGFuIGFyY2ggc3BlY2lmaWMg dmVyc2lvbiBvZg0KPiBjc3VtX3NoaWZ0KCkgaW4gdGhlIHNhbWUgcHJpbmNpcGxlIGFzIGNzdW1f YWRkKCkuDQoNClByb2JhYmx5Lg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExh a2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQs IFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K