From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793631177; b=3VbsGU7Sn2YpnAhVLToyTl3V3n8SBuDcO0tz5N4xE+cjNpBwvAXZsI3P78bnr9YYQnTb /e9scE3Yqrb4KWy0ngJlwbLtzPR9VXs5lpECN0H9FnLS7hbk+zFJk2p9YVmEN4k7VMOYr qeNfDDGngMBx9rKYoSHNWDI8r8GJ+ePhjkeWdUQTqZXSGvUNmH6RpH7vxpUB+NPKnajKs gvtsz9X8ALr8lSHzM1UcefksPij69nk4tC3yLQks7g73lCYDJcyroGVErYpyE1B4E7h0m AwbGXSS7kePCp3+qvGJf0TV2Ax/RxHyiTx7OAOTDTIn+hqKgRDjjIBVZwa81NDn21RQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793631177; h=Received:DKIM-Signature:From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:References:In-Reply-To:To:Cc: X-Mailer; bh=z15Uq40RTWsSdyyx7OaN0bxQRP62XbWMWxAG8tgRqsc=; b=pOa9KgK5/Q5vJCphq7LvQbYlR+wKH/MVVKmKKVuqMFgGbPNl7CK+Ovv8UWYGqvv0FGCK 9MCfxuGNBwSy5OOdJUUKHJ2mIs0rP0PRqz+OaQKzS6f/KrHxckzM0hfshCEc2i8bdqLtk UhVdMTzifTWNjPfd1R/rwRJylNV4qEG+ZDevZqggEw/RDZ1tzJq43unQk4PrOttydfX86 yWx7s3TDNMttuxqEkhp1Xj3SbpS4LB5xJ/I4EvhsKU6YXZlARvgNtmcUECOBoNLw+AgtG UNQbvyF7vgIwYU1cLHsvFo5ZBI1aZy84RCJ0WwfuYf1ufflDCzA09OFpbCz8jArqfbw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=YC9ApXUw; 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 53A83606E00B; Mon, 2 Nov 2026 14:52:57 +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=YC9ApXUw Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED4BF1F00A17; Mon, 2 Nov 2026 14:52:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793631177; bh=z15Uq40RTWsSdyyx7OaN0bxQRP62XbWMWxAG8tgRqsc=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=YC9ApXUwYHXdh7Oe3VkjE39wJ3Qg7gCObz/rTOq48xo1JAMB5WL5rAv5ZOVJS8qqZ ynnExq4rKiMg+GmAmkH9n8AzdYfTlEHmZ/fOsTnE53ISdXH1WVlbQFy7hO/CdAQSYn 4JbQf/FIJ657tBcgXmsRiDHSQsBBt84kHCnQ3pca44VTjgoKmBvJxiGyOKjK34ikx2 /LNlDgNsznisNZc5MkevQj1M+4bf1MamMBIardSrDk1sWSAOiPvR03vBw4J+ZC6wk0 R7UEuNIvdf3X8fF/lS/cfHuoxA8HStGxldAahOLTER+k7KMNib4+Ih4XKO3zJT65eL 9MJrEIEx2zC9Q== From: Christian Brauner Date: Mon, 02 Nov 2026 15:48:50 +0100 Subject: [PATCH RFC 10/16] proc: let procfs own the seq_file of /proc/stat X-Mailing-List: linux-input@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" Content-Transfer-Encoding: 7bit Message-Id: <20261102-work-procfs-core-v1-10-75df35e4f8b8@kernel.org> References: <20261102-work-procfs-core-v1-0-75df35e4f8b8@kernel.org> In-Reply-To: <20261102-work-procfs-core-v1-0-75df35e4f8b8@kernel.org> 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 X-Mailer: b4 0.17-dev Declare the show function and let procfs open and free the seq_file. ->proc_open() only preallocates the buffer now. Signed-off-by: Christian Brauner (Amutable) --- fs/proc/stat.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/fs/proc/stat.c b/fs/proc/stat.c index 79b42f2bfd00..3bfb79edc0f6 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -161,15 +161,13 @@ static int stat_open(struct inode *inode, struct file *file) /* minimum size to display an interrupt count : 2 bytes */ size += 2 * irq_get_nr_irqs(); - return single_open_size(file, show_stat, NULL, size); + return seq_preallocate(file->private_data, size); } static const struct proc_ops stat_proc_ops = { .proc_flags = PROC_ENTRY_PERMANENT, + .proc_show = show_stat, .proc_open = stat_open, - .proc_read_iter = seq_read_iter, - .proc_lseek = seq_lseek, - .proc_release = single_release, }; static int __init proc_stat_init(void) -- 2.53.0