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 6EA9BC43219 for ; Sun, 28 Apr 2019 03:29:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 37EB22077B for ; Sun, 28 Apr 2019 03:29:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ah239En4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726645AbfD1D35 (ORCPT ); Sat, 27 Apr 2019 23:29:57 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:40631 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726572AbfD1D3x (ORCPT ); Sat, 27 Apr 2019 23:29:53 -0400 Received: by mail-pl1-f196.google.com with SMTP id b3so3410186plr.7 for ; Sat, 27 Apr 2019 20:29:53 -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=ah239En42iuJ7me6T4fHnEcZH+drR1+tKtot9toQwo5G8dOXq0bXOCxE1rKtbmkc6i CG+7gKVAZ6uHV+lJo1/UcDMjhdOWDFp2PqCkSb4QvEdpBdiKhbp64vzcxpOtX7hfDngg occf2ycAE0rziQmQpDGFhUk3v3FmlMxu8/RSfxNXB1iRDyOE7hAYmULFMxS6TGCRDdg6 3XWbKiXKcGB8++D5rK4jQzf5hYwfImQYke1YYYCeHhi+ouyKAXbauXzRmBgE+aJogIG/ 9sqdXUdyptGdIWTAikfNomxp0qCPeZN0UMP+P7v16zJfQ+gDXZIPOKtYtvpMABi8nwT9 7Nsg== 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=SlRRKIItQD9+WfTa1U1S1hr8lMTUFJRfs/j2vjBy9p7VbiApuQ02xeoQ6ZHHJu2iV6 CxlMnCrY5mIuVpj7uTBk6G/g7B0pw0dnw4y2Fovk+wTCn6O6yrq+erARW7M1HLpw4GQ+ XNDPEdN5ZyOSvBCSvTCeVCSQFaFwdFFxqQ0JoWzHNGMD/vTidRdwq7xwAnf48byxNW3f psipLneFCPqUkRgJSCmKlD5Uyvv18yE5wW1pF8/ZgvQMEsl3h6H/gxf57JrpI3g6td2m FNO5A5Iw/xDT5kgSx850bNis2J45EGHzCH2rq5RJG8NUm1480DR/AMHmUZrdplVbPvMf wsBw== X-Gm-Message-State: APjAAAVLylV4yJ9eHM3PUxos2WtcyKoysQzXe33e/fIziMTS9rXTD91R i2flKfHGV1vDmoSorwB3WrQ= X-Google-Smtp-Source: APXvYqycFkoH0Fz362DI/R3ujrzVANYFmQIZK0QgzOdvsKX6Ndyrihk4aH5L7uQShX24LkGf+HxufQ== X-Received: by 2002:a17:902:b190:: with SMTP id s16mr16229559plr.83.1556422193180; Sat, 27 Apr 2019 20:29:53 -0700 (PDT) Received: from localhost ([2601:640:6:3484:bc53:6e04:b584:e900]) by smtp.gmail.com with ESMTPSA id s20sm35446587pgs.39.2019.04.27.20.29.52 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 27 Apr 2019 20:29:52 -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 Cc: Yury Norov , linux-kernel@vger.kernel.org, Yury Norov , Jens Axboe , Steffen Klassert Subject: [PATCH 6/6] cpumask: don't calculate length of the input string Date: Sat, 27 Apr 2019 20:29:36 -0700 Message-Id: <20190428032936.1317-7-ynorov@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190428032936.1317-1-ynorov@marvell.com> References: <20190428032936.1317-1-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