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Wed, 4 Nov 2026 19:43:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793821435; bh=MXDP9fyzpcc9X8/ROQgrmtpQySITyZcOubu0QYlfW0Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=HvxkwJrE6yZiYOxFcQMcjejW88ZaW29hTOWaJR9YO5Tvs3/8Ku/knORgdhrkWEZnm FqlvED7tkZyaWujkmmUucC82ygg0xRZPT8t1WYaFWGOQCbuZ5npn6/psp1WJsopeBc /Ip4YEzyI9/mkYahhPxRdv4RqwBmNw3bGEqLSFKH7xSvANy2+6tMJK3oeMT/j06KPr aV1SaTvwJyNaQmYfmPPmd7MRi8vEfKFW5IekI7JTcT9yV8aBpWOQ57VRcmy0cEhZAb MM7IMfpEqYVYfJYvfiLY5AP2A/DDKBQ+DAROllTXi16lENKuE4ydpoDCGxpGPMHxZe bfR3jntxCFu+g== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever Subject: [PATCH RESEND v2 06/26] md: let procfs own the seq_file of /proc/mdstat Date: Wed, 4 Nov 2026 20:43:40 +0100 Message-ID: <20261104-work-procfs-drivers-v2-6-245e54e87116@kernel.org> In-Reply-To: <20261104-work-procfs-drivers-v2-0-245e54e87116@kernel.org> References: <20261104-work-procfs-drivers-v2-0-245e54e87116@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1303; i=brauner@kernel.org; h=from:subject:message-id; bh=rdu1kmejfqc5NG4cwcsJAI4WSVobA0+Qk8YSn4PPNtc=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97qq6MLvj4dWlPlW/Lu/K/95xU/V2xNJbCyWiD8o4T U+5uk0tsKOUhUGMi0FWTJHFod0kXG45T8Vmo0wNmDmsTCBDGLg4BWAim4wZGb7tvCDdyFbA2D3h xbQ1r407Cl4f1/C3fFQsYPDizr8HIumMDFP6U2beWjP1wmONNb84O1vnWbE1dPszPL6aGeZe9b+ wjBUA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Declare the seq_operations and let procfs open and free the seq_file. ->proc_open() only records the event count for ->proc_poll() now. Signed-off-by: Christian Brauner (Amutable) --- drivers/md/md.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 03e35386a802..64abf1743e41 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -9167,18 +9167,13 @@ static const struct seq_operations md_seq_ops = { .show = md_seq_show, }; +/* procfs opens the seq_file */ static int md_seq_open(struct inode *inode, struct file *file) { - struct seq_file *seq; - int error; - - error = seq_open(file, &md_seq_ops); - if (error) - return error; + struct seq_file *seq = file->private_data; - seq = file->private_data; seq->poll_event = atomic_read(&md_event_count); - return error; + return 0; } static int md_unloading; @@ -9200,10 +9195,8 @@ static __poll_t mdstat_poll(struct file *filp, poll_table *wait) } static const struct proc_ops mdstat_proc_ops = { + .proc_seq_ops = &md_seq_ops, .proc_open = md_seq_open, - .proc_read = seq_read, - .proc_lseek = seq_lseek, - .proc_release = seq_release, .proc_poll = mdstat_poll, }; -- 2.53.0