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 18305C433EF for ; Wed, 13 Jul 2022 09:40:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235681AbiGMJj7 (ORCPT ); Wed, 13 Jul 2022 05:39:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236101AbiGMJj5 (ORCPT ); Wed, 13 Jul 2022 05:39:57 -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 ESMTP id 6E0E6F54F3 for ; Wed, 13 Jul 2022 02:39:54 -0700 (PDT) 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-220-jNhFV5uvMoyY8ZVNPGX1qw-1; Wed, 13 Jul 2022 10:39:48 +0100 X-MC-Unique: jNhFV5uvMoyY8ZVNPGX1qw-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 15.0.1497.36; Wed, 13 Jul 2022 10:39:43 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.036; Wed, 13 Jul 2022 10:39:43 +0100 From: David Laight To: 'Yu-Jen Chang' , Andrey Semashev CC: "andy@kernel.org" , "akinobu.mita@gmail.com" , Ching-Chun Huang , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH 2/2] lib/string.c: Optimize memchr() Thread-Topic: [PATCH 2/2] lib/string.c: Optimize memchr() Thread-Index: AQHYlf/m+SYzYfFyd0Sny8eSVHr68K18Ceug Date: Wed, 13 Jul 2022 09:39:43 +0000 Message-ID: <49a8be9269ee47de9fc2d0d7f09eb0b1@AcuMS.aculab.com> References: <20220710142822.52539-1-arthurchang09@gmail.com> <20220710142822.52539-3-arthurchang09@gmail.com> <3a1b50d2-a7aa-3e89-56fe-5d14ef9da22f@gmail.com> <48db247e-f6fd-cb4b-7cc5-455bf26bb153@gmail.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 RnJvbTogWXUtSmVuIENoYW5nDQo+IFNlbnQ6IDEyIEp1bHkgMjAyMiAxNTo1OQ0KLi4uDQo+ID4g SSB0aGluayB5b3UncmUgbWlzc2luZyB0aGUgcG9pbnQuIExvYWRzIGF0IHVuYWxpZ25lZCBhZGRy ZXNzZXMgbWF5IG5vdA0KPiA+IGJlIGFsbG93ZWQgYnkgaGFyZHdhcmUgdXNpbmcgY29udmVudGlv bmFsIGxvYWQgaW5zdHJ1Y3Rpb25zIG9yIG1heSBiZQ0KPiA+IGluZWZmaWNpZW50LiBHaXZlbiB0 aGF0IHRoaXMgbWVtY2hyIGltcGxlbWVudGF0aW9uIGlzIHVzZWQgYXMgYSBmYWxsYmFjaw0KPiA+ IHdoZW4gbm8gaGFyZHdhcmUtc3BlY2lmaWMgdmVyc2lvbiBpcyBhdmFpbGFibGUsIHlvdSBzaG91 bGQgYmUNCj4gPiBjb25zZXJ2YXRpdmUgd3J0LiBoYXJkd2FyZSBjYXBhYmlsaXRpZXMgYW5kIGJl aGF2aW9yLiBZb3Ugc2hvdWxkDQo+ID4gcHJvYmFibHkgaGF2ZSBhIHByZS1hbGlnbm1lbnQgbG9v cC4NCj4gDQo+IEdvdCBpdC4gSSBhZGQgIHByZS1hbGlnbm1lbnQgbG9vcC4gSXQgYWxpZ25zIHRo ZSBhZGRyZXNzIHRvIDggb3IgNGJ5dGVzLg0KDQpUaGF0IHNob3VsZCBiZSBwcmVkaWNhdGVkIG9u ICFIQVNfRUZGSUNJRU5UX1VOQUxJR05FRF9BQ0NFU1MuDQoNCi4uLg0KPiAgICAgICAgIGZvciAo OyBwIDw9IGVuZCAtIDg7IHAgKz0gOCkgew0KPiAgICAgICAgICAgICB2YWwgPSAqKHU2NCopcCBe IG1hc2s7DQo+ICAgICAgICAgICAgIGlmICgodmFsICsgMHhmZWZlZmVmZWZlZmVmZWZmdWxsKQ0K PiAmICh+dmFsICYgMHg4MDgwODA4MDgwODA4MDgwdWxsKSkNCj4gICAgICAgICAgICAgICAgIGJy ZWFrOw0KDQpJIHdvdWxkIGFkZCBhIGNvdXBsZSBvZiBjb21tZW50cywgbGlrZToNCgkvLyBDb252 ZXJ0IHRvIGNoZWNrIGZvciB6ZXJvIGJ5dGUuDQoJLy8gU3RhbmRhcmQgY2hlY2sgZm9yIGEgemVy byBieXRlIGluIGEgd29yZC4NCihCdXQgbm90IHRoZSBiaWcgNCBsaW5lIGV4cGxhbmF0aW9uIHlv dSBoYWQuDQoNCkl0IGlzIGFsc28gd29ydGggbG9va2luZyBhdCBob3cgdGhhdCBjb2RlIGNvbXBp bGVzDQpvbiAzMmJpdCBhcmNoIHRoYXQgZG9uJ3QgaGF2ZSBhIGNhcnJ5IGZsYWcuDQpUaGF0IGlz IGV2ZXJ5dGhpbmcgYmFzZWQgb24gTUlQUywgaW5jbHVkaW5nIHJpc2N2Lg0KDQoJRGF2aWQNCg0K LQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0s IE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdh bGVzKQ0K