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[209.85.220.65]) by mx.google.com with SMTPS id d2sor5870110pla.7.2019.02.08.21.51.56 for (Google Transport Security); Fri, 08 Feb 2019 21:51:56 -0800 (PST) Received-SPF: pass (google.com: domain of bart.vanassche@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; spf=pass (google.com: domain of bart.vanassche@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=bart.vanassche@gmail.com X-Google-Smtp-Source: AHgI3IYUPm+kG7/kjLgc/FEYfvgGlG7AplPXYkEWUwQ70XXWjTkhs+DUwWRij/hBCZDGYIB5a4MiDw== X-Received: by 2002:a17:902:bd97:: with SMTP id q23mr12566160pls.284.1549691515739; Fri, 08 Feb 2019 21:51:55 -0800 (PST) Received: from asus.site ([2601:647:4000:5dd1:a41e:80b4:deb3:fb66]) by smtp.gmail.com with ESMTPSA id 15sm6553635pfs.113.2019.02.08.21.51.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 08 Feb 2019 21:51:54 -0800 (PST) Subject: Re: [PATCH] fs/userfaultd: Fix a recently introduced lockdep complaint To: Andrew Morton Cc: linux-mm@kvack.org, Christoph Hellwig , Andrea Arcangeli References: <20190209010308.115292-1-bvanassche@acm.org> From: Bart Van Assche Message-ID: <204b2c05-c074-4da5-48ad-e610fae3324d@acm.org> Date: Fri, 8 Feb 2019 21:51:53 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190209010308.115292-1-bvanassche@acm.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit 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 2/8/19 5:03 PM, Bart Van Assche wrote: > Avoid that lockdep reports the following: [ ... ] Hi Christoph, If patch "aio: Fix locking in aio_poll()" (https://marc.info/?l=linux-fsdevel&m=154967401921791) would be accepted, would that allow to revert commit ae62c16e105a ("userfaultfd: disable irqs when taking the waitqueue lock") instead of applying this patch? Thanks, Bart.