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Thu, 10 Oct 2019 03:42:52 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x9A3TFJe137563; Thu, 10 Oct 2019 03:42:51 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 2vhhsnu08h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Oct 2019 03:42:51 +0000 Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x9A3gnoN011627; Thu, 10 Oct 2019 03:42:49 GMT Received: from [192.168.1.222] (/71.63.128.209) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 09 Oct 2019 20:42:49 -0700 Subject: Re: [PATCH -next] userfaultfd: remove set but not used variable 'h' To: Wei Yang Cc: YueHaibing , Andrea Arcangeli , "Joel Fernandes (Google)" , Andrew Morton , Stephen Rothwell , Hugh Dickins , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org References: <20191009122740.70517-1-yuehaibing@huawei.com> <20191010012322.GB2167@richard> <20191010033045.GA5927@richard> From: Mike Kravetz Message-ID: <01601a94-5c52-7ef6-ce08-7a86ac70fab2@oracle.com> Date: Wed, 9 Oct 2019 20:42:46 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: <20191010033045.GA5927@richard> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9405 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=876 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910100031 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9405 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=931 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910100031 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 10/9/19 8:30 PM, Wei Yang wrote: > On Wed, Oct 09, 2019 at 07:25:18PM -0700, Mike Kravetz wrote: >> On 10/9/19 6:23 PM, Wei Yang wrote: >>> On Wed, Oct 09, 2019 at 05:45:57PM -0700, Mike Kravetz wrote: >>>> On 10/9/19 5:27 AM, YueHaibing wrote: >>>>> Fixes gcc '-Wunused-but-set-variable' warning: >>>>> >>>>> mm/userfaultfd.c: In function '__mcopy_atomic_hugetlb': >>>>> mm/userfaultfd.c:217:17: warning: >>>>> variable 'h' set but not used [-Wunused-but-set-variable] >>>>> >>>>> It is not used since commit 78911d0e18ac ("userfaultfd: use vma_pagesize >>>>> for all huge page size calculation") >>>>> >>>> >>>> Thanks! That should have been removed with the recent cleanups. >>>> >>>>> Signed-off-by: YueHaibing >>>> >>>> Reviewed-by: Mike Kravetz >>> >>> If I am correct, this is removed in a recent patch. >> >> I'm having a hard time figuring out what is actually in the latest mmotm >> tree. Andrew added a build fixup patch ab169389eb5 in linux-next which >> adds the reference to h. Is there a patch after that to remove the reference? >> > > I checked linux-next tree, this commit removes the reference. > > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=add4eaeef3766b7491d70d473c48c0b6d6ca5cb7 > Yes, but unless I am mistaken this adds it back, https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ab169389eb5ff9da7113a21737574edc6d22c072 -- Mike Kravetz