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=-9.6 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,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 DB71BC3276C for ; Thu, 2 Jan 2020 04:31:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AEB2021734 for ; Thu, 2 Jan 2020 04:31:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RvwUp7Xl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727763AbgABEbX (ORCPT ); Wed, 1 Jan 2020 23:31:23 -0500 Received: from mail-qk1-f196.google.com ([209.85.222.196]:40181 "EHLO mail-qk1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727750AbgABEbV (ORCPT ); Wed, 1 Jan 2020 23:31:21 -0500 Received: by mail-qk1-f196.google.com with SMTP id c17so30614988qkg.7 for ; Wed, 01 Jan 2020 20:31:20 -0800 (PST) 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=vQjqa8LyABcBdUeE2JB5NAzR+hXd6lMpx7BCUYqPi/M=; b=RvwUp7XlHPAhl+sESC0uANnFLglo7t0+euz6UR3seyqX0O1hossA2B64dzgTT1JhmE SiSVmEeOzoEFwsl652KzZXIsXZs06XR9BY0/f8Faa73+Sg4SjwSie4C3rTdxhu39MoqZ BUMq2Bh3LRfqSeGUyLuicmFhZebOJ0UAaXnPhJlOLwyMhdx2JJSKOWLTox+ouck9dSlR kKyS8FTdxr/kIDyAoVChJ0Egf0cStkmnIKol81UNKPGWNm7GPXu84WKvKn9ONOhWOVNS XL2d8zX1bl61uia72dWPH2tXr2jKoUUEV6RAtn9ypOls5g/drpcLrrGZ0HEGWeJUL2N+ eWgw== 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=vQjqa8LyABcBdUeE2JB5NAzR+hXd6lMpx7BCUYqPi/M=; b=q3cIgXua6z/YmDjSj6dIRLlwSDHYb0+ujmF1NfRbnwcfuyNvsrqAi5ZcC4Y70pCfAQ 1ubGZ8ahlxgRRZDO2SQs/wXuH+v6L+X9/GCKW4X1Sf4i0XARPUaoGZTOjkeIrU8rnoHK dYaikkzbKm326V4ojVmftcEIhzDFWzQ4VX4piWmXIP8/zsVRAlXFd+UhMDRu3RxGgsSy U40pEiQ7Lz49jsnihIi+DgoPSkk8Z/8d1xaWYmpBssRhb+mqfboWxEU89Rdcti5d1F8f 64f3yPSMujBG+/DNt3J0Q9MIW4pDvzjb4wA+JH0ynw0eIKiHK8yJZU0KdNMne4hSNWk5 u5DA== X-Gm-Message-State: APjAAAXqALPcHjetzM2eOm8W5SgMoBDVojKPW5mS7i7VrXM8zgabgYg7 pQV0A/DeGlZl6YuG2NPi35g= X-Google-Smtp-Source: APXvYqzZkF8qqwlW2leReKONWBDhTwZKaJkR3cYtufHA7ObNTymVTB+lnxvWzbmMFNwmUZZfqnto+w== X-Received: by 2002:a37:c244:: with SMTP id j4mr64044378qkm.433.1577939480463; Wed, 01 Jan 2020 20:31:20 -0800 (PST) Received: from yury-thinkpad.dhcp.amer.jpmchase.net ([2604:2000:4185:2300:b196:4884:e960:2cb8]) by smtp.gmail.com with ESMTPSA id 16sm14876857qkj.77.2020.01.01.20.31.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Jan 2020 20:31:20 -0800 (PST) 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: Wed, 1 Jan 2020 20:30:31 -0800 Message-Id: <20200102043031.30357-8-yury.norov@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200102043031.30357-1-yury.norov@gmail.com> References: <20200102043031.30357-1-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 >From Yury Norov 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