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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=hDIYsiNB; 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 0711F606C586; Wed, 4 Nov 2026 19:54:05 +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=hDIYsiNB Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD3BB1F000C1; Wed, 4 Nov 2026 19:53:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793822045; bh=Wa2DxwoY96vQ+as6UgZb3UJIgeJzEwCZb2I3vpV0xHo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=hDIYsiNBBbAB6nCICl2CgYVmu1Hc5MI7vg03BuY69s+e6pJT+WUTVg0+E2R7BXucW ASIEwQD/8dKh5gLCW56yPPqhr/8yzBSB3mWD610B6YBFxv2MwcgJq3I6t4BOpmtLEi w6X4zToEWrG1oxCry2goo1fqiSX0980JJHxIp/b3+x2Ri2+ReMv/Jb0QANsRd2Di7t Rzpga7r+AFVcSz5t835+amCK62QzA458xk0IuFMIaQ5wJCfI9SpgS4G48o8mHpSNgB +voP9K2fVkENG08+Y1lBh+7RUetaZbq4uubBe+qWoiy60DFlrYcnLc2yMGlLbTHf9s swfqQ47cYsOow== 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 17/30] sched/psi: let procfs own the seq_file of the pressure files Date: Wed, 4 Nov 2026 20:53:51 +0100 Message-ID: <20261104-work-procfs-fs-v2-17-319e0f9a8aae@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=2971; i=brauner@kernel.org; h=from:subject:message-id; bh=pvcY7H3zDMUPKTR5VRDjfAM6gaPdAO9YnwSNmLk0d3g=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97rGfE8i72E/yhZutqDL7PN47uzQ8K50TT+4w3Hhbf vutkt0VHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABNZfZWR4efcj3di9RK3nt10 KDbRd+L7jS/X575VFDqYfmbv94ueCxcyMqxquv8teNcGj2WSIeec/c4dzeWyOO2pu//Is1kJNi7 cT1kA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit Declare the show functions and let procfs open and free the seq_file of /proc/pressure/*. That makes the open functions unnecessary and ->proc_release() only destroys the trigger now. Signed-off-by: Christian Brauner (Amutable) --- kernel/sched/psi.c | 38 +++++--------------------------------- 1 file changed, 5 insertions(+), 33 deletions(-) diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index 8b59635e95d4..9f1d9742bac9 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -1535,21 +1535,6 @@ static int psi_cpu_show(struct seq_file *m, void *v) return psi_show(m, &psi_system, PSI_CPU); } -static int psi_io_open(struct inode *inode, struct file *file) -{ - return single_open(file, psi_io_show, NULL); -} - -static int psi_memory_open(struct inode *inode, struct file *file) -{ - return single_open(file, psi_memory_show, NULL); -} - -static int psi_cpu_open(struct inode *inode, struct file *file) -{ - return single_open(file, psi_cpu_show, NULL); -} - static ssize_t psi_write(struct file *file, const char __user *user_buf, size_t nbytes, enum psi_res res) { @@ -1635,31 +1620,25 @@ static int psi_fop_release(struct inode *inode, struct file *file) struct seq_file *seq = file->private_data; psi_trigger_destroy(seq->private); - return single_release(inode, file); + return 0; } static const struct proc_ops psi_io_proc_ops = { - .proc_open = psi_io_open, - .proc_read = seq_read, - .proc_lseek = seq_lseek, + .proc_show = psi_io_show, .proc_write = psi_io_write, .proc_poll = psi_fop_poll, .proc_release = psi_fop_release, }; static const struct proc_ops psi_memory_proc_ops = { - .proc_open = psi_memory_open, - .proc_read = seq_read, - .proc_lseek = seq_lseek, + .proc_show = psi_memory_show, .proc_write = psi_memory_write, .proc_poll = psi_fop_poll, .proc_release = psi_fop_release, }; static const struct proc_ops psi_cpu_proc_ops = { - .proc_open = psi_cpu_open, - .proc_read = seq_read, - .proc_lseek = seq_lseek, + .proc_show = psi_cpu_show, .proc_write = psi_cpu_write, .proc_poll = psi_fop_poll, .proc_release = psi_fop_release, @@ -1671,11 +1650,6 @@ static int psi_irq_show(struct seq_file *m, void *v) return psi_show(m, &psi_system, PSI_IRQ); } -static int psi_irq_open(struct inode *inode, struct file *file) -{ - return single_open(file, psi_irq_show, NULL); -} - static ssize_t psi_irq_write(struct file *file, const char __user *user_buf, size_t nbytes, loff_t *ppos) { @@ -1683,9 +1657,7 @@ static ssize_t psi_irq_write(struct file *file, const char __user *user_buf, } static const struct proc_ops psi_irq_proc_ops = { - .proc_open = psi_irq_open, - .proc_read = seq_read, - .proc_lseek = seq_lseek, + .proc_show = psi_irq_show, .proc_write = psi_irq_write, .proc_poll = psi_fop_poll, .proc_release = psi_fop_release, -- 2.53.0