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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=aKP7JyYG; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A268609CAC6; Wed, 4 Nov 2026 19:56:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=aKP7JyYG Received: by smtp.kernel.org (Postfix) with ESMTPSA id B86BA1F000C1; Wed, 4 Nov 2026 19:56:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793822192; bh=LBl2/qBMA7OV4BMTYua5kVHXByvRuxQ8RJbkH2xlEeQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=aKP7JyYGkDXXcZgiOMyJDOMnJ3YKXipcdyKMOhnZ/kDushdocc5j2aUosHVgdFjuG W8NqrAjXIVJtlk3D6BRdnDPijmdfnyH55xY4/5GIe8B7ijNhQWuqM7VHbGTChu/S5p bjawb6WUZLBB8pnefyGL4zorD4j/72K+4RlaEoOxwLWCBU80eFeiO+LKNoVR3cDXsM 3PJy33mjWSy8B1p5T5flpR5Cr9VBJtwZuxs51UHe1Pt2cbGiY3/+T4y9EH9bSAjyVG E7eQOJVTxndTF1qhOS06r3zzRaWFs4kd9ALYhL3GOdUn4eRB1X31/INX4f8HZSXd4y I59kxqMTzVXsw== 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 27/30] mm/swapfile: let procfs own the seq_file of /proc/swaps Date: Wed, 4 Nov 2026 20:56:18 +0100 Message-ID: <20261104-work-procfs-fs-v2-27-319e0f9a8aae@kernel.org> In-Reply-To: <20261104-work-procfs-fs-v2-0-319e0f9a8aae@kernel.org> References: <20261104-work-procfs-fs-v2-0-319e0f9a8aae@kernel.org> X-Mailing-List: linux-modules@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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=1169; i=brauner@kernel.org; h=from:subject:message-id; bh=xP8svTINdkdtOq03sFDyUkKM00LKGtRsGg97ENBLGtM=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97vHhXJd8Kth7+zWufRt8tZu59658dXe75H+F8xvTV ml+XhRg2lHKwiDGxSArpsji0G4SLrecp2KzUaYGzBxWJpAhDFycAjCRqbMZ/kps+sao8ittxlXf /G8XPGKtjMsDSyLXBR7ut+jjuGbTHMHwP7A9pOPMY4eI2fw/JsV8unzukJPgecs1+ql+y/k/6SR 1sAAA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit 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) --- mm/swapfile.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/mm/swapfile.c b/mm/swapfile.c index 254ce86fa923..ee4868ecc3a7 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -3410,26 +3410,19 @@ static const struct seq_operations swaps_op = { .show = swap_show }; +/* procfs opens the seq_file */ static int swaps_open(struct inode *inode, struct file *file) { - struct seq_file *seq; - int ret; - - ret = seq_open(file, &swaps_op); - if (ret) - return ret; + struct seq_file *seq = file->private_data; - seq = file->private_data; seq->poll_event = atomic_read(&proc_poll_event); return 0; } static const struct proc_ops swaps_proc_ops = { .proc_flags = PROC_ENTRY_PERMANENT, + .proc_seq_ops = &swaps_op, .proc_open = swaps_open, - .proc_read = seq_read, - .proc_lseek = seq_lseek, - .proc_release = seq_release, .proc_poll = swaps_poll, }; -- 2.53.0