From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 4FB186078257 for ; Mon, 2 Nov 2026 14:53:01 +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: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4jJF7J0RMQz2xlw; Tue, 03 Nov 2026 01:53:00 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=172.234.252.31 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1793631180; cv=none; b=SBjWZ1jY4Z2Kdx/GKKRy9bIN2CU/okTpOibtFV7cCXoYpf0Auya94vLiIDXj0axW1e1QUNmBe8SmGyp88dXATZRYcYG2PO8+ov//rKNO/fVGtXs6g1XDHl+R+MzwYmWcqkPjGTEPhRu2R+x2bh1LVZoedybGL/WeaDMbZjI5OY/WGYQo0aU2c1moZv9ehSM3O8YJRp4czsGgAiJ/laydOgq03dZOpUwQVOa0uPZFU7hkH08QvmGaB0914GPKA4UlEvmNMyTGPAY2N/4bDQhZNi9V3p1Lb0OqV2y9zENRorDzAJT8URRTWd1Y24i4nOtADBSjQm+Sat0iovzGY9XuTg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1793631180; c=relaxed/relaxed; bh=z15Uq40RTWsSdyyx7OaN0bxQRP62XbWMWxAG8tgRqsc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=NoMWRzvda01u1KKCXRSqoF4EgH1Tq85u4npdoukal33F3Z/tZ1BX7O27VmgdOjfMMWzoiCh+AXSl8uAyrl9A7czKYvWjXNCBUpuzw/0Ha8gAm+7t9vkydpCjxwzl9aqiByTi3yqBVlMPWq8ztpQLjBqcETsLgzcjs0A1w97rlncuv08C63DAG7M2TUUa2OfnMjgJ8MqrpHlP3TctBb7V89WtcTMJnTxOUCwiz0KBR3go0X8cZVSBuRZ8gankmhFppv7dvLLcs5/eVAk3Skz8FukNm2sngNtmePKc4POrjFSY07/MIRQ62RvR2blGQHOEJ1zURJciI5mFlC1WuvlZ1g== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=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; dkim-atps=neutral; spf=pass (client-ip=172.234.252.31; helo=sea.source.kernel.org; envelope-from=brauner@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.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; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=172.234.252.31; helo=sea.source.kernel.org; envelope-from=brauner@kernel.org; receiver=lists.ozlabs.org) Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4jJF7H0ds4z2xdb for ; Tue, 03 Nov 2026 01:52:59 +1100 (AEDT) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 162C643ACE; Mon, 2 Nov 2026 14:52:57 +0000 (UTC) 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: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , Precedence: list X-Archived-By: 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 X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, 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 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