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[24.9.64.241]) by smtp.gmail.com with ESMTPSA id s5sm1111548ois.55.2021.10.28.06.13.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 28 Oct 2021 06:13:44 -0700 (PDT) Subject: Re: [PATCH] userfaultfd/selftests: use swap() to make code cleaner To: cgel.zte@gmail.com, 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 , Shuah Khan References: <20211028112331.16152-1-deng.changcheng@zte.com.cn> From: Shuah Khan Message-ID: Date: Thu, 28 Oct 2021 07:13:43 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20211028112331.16152-1-deng.changcheng@zte.com.cn> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Stat-Signature: n9fhhsdjqjpzafh4ris5ktxrji1h95ca Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=linuxfoundation.org header.s=google header.b=Fs6zHdSI; spf=pass (imf28.hostedemail.com: domain of skhan@linuxfoundation.org designates 209.85.167.171 as permitted sender) smtp.mailfrom=skhan@linuxfoundation.org; dmarc=pass (policy=none) header.from=linuxfoundation.org X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 5DC1A9000534 X-HE-Tag: 1635426826-350680 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 10/28/21 5:23 AM, cgel.zte@gmail.com wrote: > From: Changcheng Deng > > Use swap() in order to make code cleaner. Issue found by coccinelle. Please include the coccinelle log. > > 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); > } > thanks, -- Shuah