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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 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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