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 X-Spam-Level: X-Spam-Status: No, score=-8.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86D5FC04AA6 for ; Wed, 1 May 2019 01:07:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 540BD2177B for ; Wed, 1 May 2019 01:07:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="f57FHpJ5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727610AbfEABHA (ORCPT ); Tue, 30 Apr 2019 21:07:00 -0400 Received: from mail-pl1-f193.google.com ([209.85.214.193]:41545 "EHLO mail-pl1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727578AbfEABG4 (ORCPT ); Tue, 30 Apr 2019 21:06:56 -0400 Received: by mail-pl1-f193.google.com with SMTP id d9so7547020pls.8 for ; Tue, 30 Apr 2019 18:06:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=OLqlCdGifnXbJDeVsXrWrzyh1Q2u7Oi69jQbP0f+asI=; b=f57FHpJ5TFR88oCECdqZ5veBYfcE1BKJQLnole8kARqKQqmUBSto9h3qlLmU4gyISD JMwn+Olvo/q5gs3AsNwtxVjNTSiHanUefEgJGXeqM2RAXhPx7O3cnkEqGpdfQnfL7KAO xtNs1P4JLOROUf9HljO5LCnRKpr/svXGq3l6OJ2yynGwhQeWL+1f+gGqIAyT/yMLCEes xdDR/8n3c1VwJifrFIsDjpYjhv1vVCw0HsAZp0KJrHfghaBQ6eeZvnVv3X0N0gvzfQB6 DvjPX+Tv9H6RLm3siGibNr9a4ra9lR4l4WBTV282f8xoKQXjQpTNrXhuMk/qY0oXHgP+ h7Vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=OLqlCdGifnXbJDeVsXrWrzyh1Q2u7Oi69jQbP0f+asI=; b=LI7kXfE+3T48wiWqojhDv82bOaYzSf1g6r8XqMT1UPj5pgHhtezZLJTMkG5lcIhYG1 vpuVK8uZc+xipKBPejguAuIWCHImAlb0gk0KHtxEbn0s2ObJYfQxIUupZS3r4JMt+9Cl A/BiMk+VaB6CHoyIFVSPCBvZCE4R8UlXTqtHzlHuBoNCwWCSVMBb+iT4RuEy1RWLR1am NTYt5TbKBLJ6osOq31/iusBC1dSvHXP+BJioUClue6jWwrsMvDBWg2eWazdsZ3DwM7QB 74/9i0asjXx44RpxZfZ099RoGAkZs5O0tqiRJQe1LZNsaKMsDmeuM+FLh15olBjtuqfW 6dag== X-Gm-Message-State: APjAAAWbBZ1ZzSobsXFm851WprBeUSC/2JbYB2bZJOxiCzJ3YZlwOF55 /iGiQQpwNAPvYxg873OX4OM= X-Google-Smtp-Source: APXvYqxNDihCBF3w9VIZv+La7NAGr9r46gV71wHBl31KYr9Uyqd8211ztTSUU/REYyg8Eurk5DDBGg== X-Received: by 2002:a17:902:7d8f:: with SMTP id a15mr72879435plm.3.1556672816197; Tue, 30 Apr 2019 18:06:56 -0700 (PDT) Received: from localhost ([2601:640:7:332f:bc53:6e04:b584:e900]) by smtp.gmail.com with ESMTPSA id d8sm41008582pgv.34.2019.04.30.18.06.55 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 30 Apr 2019 18:06:55 -0700 (PDT) From: Yury Norov X-Google-Original-From: Yury Norov To: Andrew Morton , Andy Shevchenko , Rasmus Villemoes , Dmitry Torokhov , "David S . Miller" , Stephen Rothwell , Amritha Nambiar , Willem de Bruijn , Kees Cook , Matthew Wilcox , "Tobin C . Harding" , Will Deacon , Miklos Szeredi , Vineet Gupta , Chris Wilson , Arnaldo Carvalho de Melo , linux-kernel@vger.kernel.org Cc: Yury Norov , Yury Norov , Jens Axboe , Steffen Klassert Subject: [PATCH 7/7] cpumask: don't calculate length of the input string Date: Tue, 30 Apr 2019 18:06:36 -0700 Message-Id: <20190501010636.30595-8-ynorov@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190501010636.30595-1-ynorov@marvell.com> References: <20190501010636.30595-1-ynorov@marvell.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org New design of inner bitmap_parse() allows to avoid calculating the size of a null-terminated string. Signed-off-by: Yury Norov --- include/linux/cpumask.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 21755471b1c3..d55d015edc58 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -633,9 +633,7 @@ static inline int cpumask_parselist_user(const char __user *buf, int len, */ static inline int cpumask_parse(const char *buf, struct cpumask *dstp) { - unsigned int len = strchrnul(buf, '\n') - buf; - - return bitmap_parse(buf, len, cpumask_bits(dstp), nr_cpumask_bits); + return bitmap_parse(buf, UINT_MAX, cpumask_bits(dstp), nr_cpumask_bits); } /** -- 2.17.1