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=-9.8 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_HELO_NONE,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 14173C00307 for ; Mon, 9 Sep 2019 03:33:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD83A2196E for ; Mon, 9 Sep 2019 03:33:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QGm/mKgP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387799AbfIIDdc (ORCPT ); Sun, 8 Sep 2019 23:33:32 -0400 Received: from mail-lj1-f193.google.com ([209.85.208.193]:39630 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387619AbfIIDdW (ORCPT ); Sun, 8 Sep 2019 23:33:22 -0400 Received: by mail-lj1-f193.google.com with SMTP id j16so11227675ljg.6 for ; Sun, 08 Sep 2019 20:33:21 -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 :mime-version:content-transfer-encoding; bh=7HrLaUycn7d84Voxa4K45NCBL5KXP9evMiq59t0jDTA=; b=QGm/mKgP1l6sLr+I+MVnGSwdvru5M3VOm+YZZAFcrgUEk2DR6o93771mUDvyewLUz4 Pt+vvHA2sCeCkEpQhVzxFQOZzER5FtMgpgMIT06inVSWAPZodnzVzfB2Zk9ZRHCsrIS/ AGpvfeV45BNeL2fcuIOiAO7o/6IjqmLn9byTMkr9GOK8PgA0dLGr+lVRftlMD8RXMlAt WpgnqrjBTmwtEO7azK+El3MVw4JLoqPms8sfGbHhnocmT5PWePTHuFZLagCx6tkIJ/nr pSY/tWMEoRFP37I3AXqWMkwoX0HxUxGH1/m6B4GmcB6pj3rBzlLhrnFt8wK6redEPF80 /Few== 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:mime-version:content-transfer-encoding; bh=7HrLaUycn7d84Voxa4K45NCBL5KXP9evMiq59t0jDTA=; b=aKM1ejfE3Fm9Rc7s8DVYx4LNrv3X5zvV+O0dmd/xFDvRHDy0YrYe8MRs0wsZZ7ljn1 MSsXPytwKPhChWL2gROVoIfUT4QsHzPQefufkRdgaLOh5VmnnkEqI5Pse1xpQoJieNJY zuZbU8emiVCATnGsgwXmsaAhnuRZum19QMtvt9VZuUMWa8by7rERGCpza9C3Wd7AcxSC wtX8ofTlECaAUqJ5XKDVGsqFBrdKZ8vdgP80lvIkyob6kXbOkLxYzvNSz/AMx3s9CYih Xmxs5PI7FKqA31agDbFQcoKh8GFkFNv83fybO90cCU8xRpb/YR4UP0ADU5q74g9vaUXF 4Ymw== X-Gm-Message-State: APjAAAUzCY9sOoAXzL6QkV8nDqC/7WlMddsTfNlwO3XpJIUDlrB6d4LL oL5tCcyNZ+a6q57kjTy6jmg= X-Google-Smtp-Source: APXvYqyhGodpiklMJnNZAHntJKm2hzeJiG5QDa/Vy0/gVENIIn2BkY7GY3I5guwqe3EFgVjMF17A6A== X-Received: by 2002:a2e:819a:: with SMTP id e26mr6059579ljg.197.1568000000346; Sun, 08 Sep 2019 20:33:20 -0700 (PDT) Received: from localhost.localdomain (128-73-37-85.broadband.corbina.ru. [128.73.37.85]) by smtp.gmail.com with ESMTPSA id f22sm2783605lfk.56.2019.09.08.20.33.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 Sep 2019 20:33:19 -0700 (PDT) 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 , Jens Axboe , Steffen Klassert Subject: [PATCH 7/7] cpumask: don't calculate length of the input string Date: Sun, 8 Sep 2019 20:30:21 -0700 Message-Id: <20190909033021.11600-8-yury.norov@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190909033021.11600-1-yury.norov@gmail.com> References: <20190909033021.11600-1-yury.norov@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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. Reviewed-by: Andy Shevchenko 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 78a73eba64dd6..d5cc88514aee6 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -663,9 +663,7 @@ 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); } /** -- 2.20.1