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 B3A27C76191 for ; Sun, 21 Jul 2019 21:28:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8B02F21743 for ; Sun, 21 Jul 2019 21:28:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Yam6/Ypa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727198AbfGUV2u (ORCPT ); Sun, 21 Jul 2019 17:28:50 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:33378 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727021AbfGUV2o (ORCPT ); Sun, 21 Jul 2019 17:28:44 -0400 Received: by mail-pf1-f195.google.com with SMTP id g2so16379729pfq.0 for ; Sun, 21 Jul 2019 14:28:44 -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=uzae+Qd1Byrv0UOQeZfaSHTaSyqBzZD/Hpc9kz59NfY=; b=Yam6/YpaOP6bPTYwljYxwlWuX3jMD/lCzg3QiuYIa6gRAmzrU8wKPQ1ILS3OSpKirO 6lgKvjPdvFrJbgH0wxsT4NvWeTYQ2s8uSe2i9aN1Py8mVBesyKmO1HZu9FlE4wRth2bq 5akk3QyFYHwG65RBQtkuXuYQCrA3PhblISq3qdjG8wu4GKvan7RSC8e8X71FwVQQVzVp 0itzSO0NGWzPCAL27VKQWrigRihwjsvNBpBKhob/jS3hyfTTbEP+qrJL+2I9IsnAHpwA /TVXO53jGoMgl0ca5aGaqvQE1tT9E6aHqeOeLmOROgWrphmueA6auBYxwMDalqZBAL8Q XNOw== 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=uzae+Qd1Byrv0UOQeZfaSHTaSyqBzZD/Hpc9kz59NfY=; b=mX/Ouyt/UpfEmiriQEyByVbYDlcGLPYU5j/0dGWZ16hXCEuZsyJFIB2zOpkhSOCOit LBlGydh8o7HRoc1nRujF/DBslIRg5qYTJCwjo3TGGsdf033IwDyS6zpcWmWKJKTP43Nj 4lV8KD4zUFkoUKdSF1gFLcMpXIJu12Nm1SiQiGZtuTiYIgjFU4tCz70NrkDaSiPoT68s b1G5z+OJ1freVvOUZsiKVBc5uwQpz87TYQ6LaQjoZqzPTxcbt06dg61HpC2WOkrrQnXv wG1e/pZrJgdSWginMhmkFmOZhoxGFwn9krHBchtgaJkv5pHNEgkgakftrIC6R/evsKbB MBYQ== X-Gm-Message-State: APjAAAXHK/Lp/LP2L7ulMyUcrQcbCD0LNmOBUZmQ4VQuycTlr12qE+RQ xuHnRtin5u7GvkkRB1Q5sDs= X-Google-Smtp-Source: APXvYqy3imS8LcCW0KIw5rHT/3yUpApQ1RumQtdmq4C5tgkebLhe6k/q9lQLM0Z0ng/Cs7C7tMUwSg== X-Received: by 2002:a17:90a:ab0b:: with SMTP id m11mr75527588pjq.73.1563744523798; Sun, 21 Jul 2019 14:28:43 -0700 (PDT) Received: from localhost.localdomain ([2601:640:105:2ef8:a909:5e8d:6363:7009]) by smtp.gmail.com with ESMTPSA id t9sm37970510pji.18.2019.07.21.14.28.42 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 21 Jul 2019 14:28:43 -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 , Yury Norov , Jens Axboe , Steffen Klassert Subject: [PATCH 7/7] cpumask: don't calculate length of the input string Date: Sun, 21 Jul 2019 14:27:53 -0700 Message-Id: <20190721212753.3287-8-yury.norov@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190721212753.3287-1-yury.norov@gmail.com> References: <20190721212753.3287-1-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 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 21755471b1c31..d55d015edc58a 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); } /** -- 2.20.1