From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757125AbbFPI56 (ORCPT ); Tue, 16 Jun 2015 04:57:58 -0400 Received: from mail-yh0-f48.google.com ([209.85.213.48]:33837 "EHLO mail-yh0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932866AbbFPIth (ORCPT ); Tue, 16 Jun 2015 04:49:37 -0400 Message-ID: <557FEBD5.5010902@gmail.com> Date: Tue, 16 Jun 2015 04:26:45 -0500 From: Luke Skywalker User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0 SeaMonkey/2.30 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: [PATCH] small update for strlen, strnlen, use less cpu instructions Content-Type: multipart/mixed; boundary="------------060107040406090707030505" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------060107040406090707030505 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit very small update to strlen and strnlen that now use less cpu instructions by using a counter avoiding the memory addresses substraction to find the length of the string, Orestes Leal Rodriguez. --------------060107040406090707030505 Content-Type: text/plain; charset=windows-1252; name="string.c.patch" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="string.c.patch" LS0tIGxpYi9zdHJpbmcuYy5vcmlnCTIwMTUtMDYtMTUgMjM6NTk6MzIuNzY4MzQ2MTkzIC0w NDAwCisrKyBsaWIvc3RyaW5nLmMJMjAxNS0wNi0xNiAwMDoxMTo0NS43OTEzODE1MzkgLTA0 MDAKQEAgLTE3LDYgKzE3LDEwIEBACiAgKiAqIFNhdCBGZWIgMDkgMjAwMiwgSmFzb24gVGhv bWFzIDxqYXNvbkB0b3BpYy5jb20uYXU+LAogICogICAgICAgICAgICAgICAgICAgIE1hdHRo ZXcgSGF3a2lucyA8bWF0dEBtaC5kcm9wYmVhci5pZC5hdT4KICAqIC0gIEtpc3NlZCBzdHJ0 b2soKSBnb29kYnllCisgKgorICogKiBUdWVzZGF5IEp1bmUgMTYgMjAxNSwgT3Jlc3RlcyBM ZWFsIFJvZHJpZ3VleiA8bHVrZXMzNTdAZ21haWwuY29tPgorICogLSBzdHJsZW4sIHN0cm5s ZW46IGJ5IHVzaW5nIGEgc2luZ2xlIGNvdW50ZXIgd2UgdXNlIGxlc3MgY3B1IGluc3RydWN0 aW9ucworICogICBieSBhdm9pZGluZyBzdWJzdHJhY3RpbmcgdGhlIG1lbW9yeSBhZGRyZXNz ZXMgYmVmb3JlIHJldHVybgogICovCiAKICNpbmNsdWRlIDxsaW51eC90eXBlcy5oPgpAQCAt NDAxLDExICs0MDUsMTEgQEAgRVhQT1JUX1NZTUJPTChzdHJpbSk7CiAgKi8KIHNpemVfdCBz dHJsZW4oY29uc3QgY2hhciAqcykKIHsKLQljb25zdCBjaGFyICpzYzsKKwlzaXplX3Qgc3og PSAwOwogCi0JZm9yIChzYyA9IHM7ICpzYyAhPSAnXDAnOyArK3NjKQotCQkvKiBub3RoaW5n ICovOwotCXJldHVybiBzYyAtIHM7CisJZm9yICg7ICpzKysgIT0gJ1wwJzsgc3orKykKKwkJ LyplbXB0eSAqLzsKKwlyZXR1cm4gc3o7CiB9CiBFWFBPUlRfU1lNQk9MKHN0cmxlbik7CiAj ZW5kaWYKQEAgLTQxOCwxMiArNDIyLDEzIEBAIEVYUE9SVF9TWU1CT0woc3RybGVuKTsKICAq Lwogc2l6ZV90IHN0cm5sZW4oY29uc3QgY2hhciAqcywgc2l6ZV90IGNvdW50KQogewotCWNv bnN0IGNoYXIgKnNjOworCXNpemVfdCBzeiA9IDA7CiAKLQlmb3IgKHNjID0gczsgY291bnQt LSAmJiAqc2MgIT0gJ1wwJzsgKytzYykKLQkJLyogbm90aGluZyAqLzsKLQlyZXR1cm4gc2Mg LSBzOworCWZvciAoOyBjb3VudC0tICYmICpzKysgIT0gJ1wwJzsgc3orKykKKwkJLyogZW1w dHkgKi87CisJcmV0dXJuIHN6OwogfQorCiBFWFBPUlRfU1lNQk9MKHN0cm5sZW4pOwogI2Vu ZGlmCiAK --------------060107040406090707030505--