From patchwork Thu Oct 28 11:23:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: CGEL X-Patchwork-Id: 12589903 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01709C433F5 for ; Thu, 28 Oct 2021 11:23:41 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 895CF610FC for ; Thu, 28 Oct 2021 11:23:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 895CF610FC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id B5FDD6B0071; Thu, 28 Oct 2021 07:23:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B0EB26B0072; Thu, 28 Oct 2021 07:23:39 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9FE056B0073; Thu, 28 Oct 2021 07:23:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0208.hostedemail.com [216.40.44.208]) by kanga.kvack.org (Postfix) with ESMTP id 7A0806B0071 for ; Thu, 28 Oct 2021 07:23:39 -0400 (EDT) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id D9CAE82499A8 for ; Thu, 28 Oct 2021 11:23:38 +0000 (UTC) X-FDA: 78745610916.29.33E4992 Received: from mail-pj1-f44.google.com (mail-pj1-f44.google.com [209.85.216.44]) by imf03.hostedemail.com (Postfix) with ESMTP id E478830000AD for ; Thu, 28 Oct 2021 11:23:33 +0000 (UTC) Received: by mail-pj1-f44.google.com with SMTP id np13so4428954pjb.4 for ; Thu, 28 Oct 2021 04:23:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=TvnootBtDGVgLyDMhxKtt7j81OcPK/yRLbkFlYIzag8=; b=E+fFVcTV7AN2DNE8DwXVmv1OniOy3ZL4cwkZIK6QM03yC6+AcEA+AOSVx0kfHyY48c pKRShfobTaldoT1EzJaGCAkXh2rlwcV3xBb3VaOByoK0MKAXkfxiTdeACsvVo8kDa+PN VKWVkdg06o0vpSxt9t/Mtr8k/4i2fQz2zXRxOGVC2Fse7J1zPUnQVFaWnQ9pyXgmRYxQ 2qAuVRGfO9Sx5qsSL7wyOhOEE4D2i3YdnQE2xRw+TnwXGyekz5cvjZ3nplhArQfCud9B bdw1QwyWv1AhpGu27RPrj7llu8qI16NZJy2iRw3pfmpjxLDrWN6W8o5mrL58esrRop3l b5uQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=TvnootBtDGVgLyDMhxKtt7j81OcPK/yRLbkFlYIzag8=; b=jIpF/9MyffEDuUs0vHHvhkmxSfUVABvCz5sUXCfgXG6iw5jKsVbwONtKoKoR83UIbl S6WAj5nt7jJ/pzK57DUT4csImL3eP2xxU9G8DRi4gv5F9jzet0u0oi2VJ60dRTBB1WTI ZXgkP2kGOyJ+s0BOCb1ecUo4t+EEAE93ZjpqXtcJUYsBk24oX+WiN1VxthqbhZv5vD1Q UT6hRrEkeT/PhKdTZ/j+P5FoTfEXr/GOCJUw+du8lmDplrGDs3Ro6lyb4XdqdxK/clL+ WHQfitpMGQJG375Kq3CBM6Nzsb8C8QJNiLL7N7AczlQpPtwjyM8AqISE4xu3PJXzHzqJ OKww== X-Gm-Message-State: AOAM533psjDfPR1/ppF9dKlihYo4JKLLUaQJL0xRmgfQS78XobGGMyNo soyb2bEXKCpwAQyROT7jvvk= X-Google-Smtp-Source: ABdhPJxcrr9mZ0anG9vgeQ1+PV0mOQX8OeiZ6bW53lFUNbMY7klUyxliQzquDXfFyqoiGpp9tgwa3Q== X-Received: by 2002:a17:902:6b4a:b0:13f:8e99:2149 with SMTP id g10-20020a1709026b4a00b0013f8e992149mr3340883plt.87.1635420217299; Thu, 28 Oct 2021 04:23:37 -0700 (PDT) Received: from localhost.localdomain ([193.203.214.57]) by smtp.gmail.com with ESMTPSA id x26sm3142758pff.25.2021.10.28.04.23.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Oct 2021 04:23:37 -0700 (PDT) From: cgel.zte@gmail.com X-Google-Original-From: deng.changcheng@zte.com.cn To: akpm@linux-foundation.org Cc: shuah@kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Changcheng Deng , Zeal Robot Subject: [PATCH] userfaultfd/selftests: use swap() to make code cleaner Date: Thu, 28 Oct 2021 11:23:31 +0000 Message-Id: <20211028112331.16152-1-deng.changcheng@zte.com.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Stat-Signature: kjchzx7hm5c9aa89jqxqfg7cwwe679re Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=E+fFVcTV; spf=pass (imf03.hostedemail.com: domain of cgel.zte@gmail.com designates 209.85.216.44 as permitted sender) smtp.mailfrom=cgel.zte@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: E478830000AD X-HE-Tag: 1635420213-358789 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000441, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Changcheng Deng Use swap() in order to make code cleaner. Issue found by coccinelle. Reported-by: Zeal Robot Signed-off-by: Changcheng Deng --- tools/testing/selftests/vm/userfaultfd.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 8a09057d2f22..41dfe6f4ebfb 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -1413,7 +1413,6 @@ static void userfaultfd_pagemap_test(unsigned int test_pgsize) static int userfaultfd_stress(void) { void *area; - char *tmp_area; unsigned long nr; struct uffdio_register uffdio_register; struct uffd_stats uffd_stats[nr_cpus]; @@ -1524,13 +1523,8 @@ static int userfaultfd_stress(void) count_verify[nr], nr); /* prepare next bounce */ - tmp_area = area_src; - area_src = area_dst; - area_dst = tmp_area; - - tmp_area = area_src_alias; - area_src_alias = area_dst_alias; - area_dst_alias = tmp_area; + swap(area_src, area_dst); + swap(area_src_alias, area_dst_alias); uffd_stats_report(uffd_stats, nr_cpus); }