From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AA03FD7237B for ; Sun, 25 Jan 2026 22:49:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=fIlOylRFtrz6Y8aHaeFollDw8gct1ZUfoZOv83NSigE=; b=uLKIN7M58hwGaMcJdpgLo1BuHa Yo7f9+RT6RLgEBnas4X1tLLoMmv7s/MDjMvIG3sy41l1GpYGTPuaFUpnlJe/gdpKcTpnFGG//IFLW SlPWU6Hx26mGKuZZfeg9o7SZ9d0jTRwryRLgyA8CtVm535h+wb82RJZ9z1TfBPvkMnviUekueVcDo i51tPAFRHndcIxj59KZGaGTggRn1IOlEiFmVVeSMcyd+VgMWkFRYJKDGDJxGPn3Ty/QF78pV9JwHL P/6ZgJJhlbrLKNP9RytAKeMlOet4Nr+eJI5jezdKwvERdO3ZyMnjjk73ZS3Am8Ya3U7shGoWvdOKE 5CcE3ikw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vk8uj-0000000Bczw-3VeK; Sun, 25 Jan 2026 22:49:01 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vk8ui-0000000BcyN-0YSg for linux-arm-kernel@lists.infradead.org; Sun, 25 Jan 2026 22:49:00 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 81678600CB; Sun, 25 Jan 2026 22:48:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6CCC0C2BC87; Sun, 25 Jan 2026 22:48:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769381339; bh=WfH/BEHCO4tRBNYS6k1Vgh28uP7HnVhy+PmfS91LOJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dy+BYVqw0O1s3QzEYM4MR0fWTzp73RlR0LyB9A3qFhaAGl2AjZYyLqdayLPZ6+ZpB +OCmoXmLP8MVpzqAZut5Agy8D+dQV7n3FDSaTLgi41yvwbAuihWDqvu9bRdBTYPodi wiPuYBJa/anYV7B+xDhqeA4MNx8kYCoLeeHbIc2DwSDEXKhk9Z+7h9K6Fx3iviWf9r cD0SQWzB0cMMDrQkjo/GFn6+VWjy6wDJzQDrdIqBOKGXoeLHTcGqCIl6B1Jyir8IKN XfwCqNrf2mTF7oMnVsNUtcv1OIFle98VrKLDs6/Jv+T4vuauRvPtbeqHamJTLYtmZG 7dk23P8wx9dWQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Chen Ridong , Danilo Krummrich , "David S . Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Waiman Long , Will Deacon , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH 23/33] PCI: Remove superfluous HK_TYPE_WQ check Date: Sun, 25 Jan 2026 23:45:30 +0100 Message-ID: <20260125224541.50226-24-frederic@kernel.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20260125224541.50226-1-frederic@kernel.org> References: <20260125224541.50226-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org It doesn't make sense to use nohz_full without also isolating the related CPUs from the domain topology, either through the use of isolcpus= or cpuset isolated partitions. And now HK_TYPE_DOMAIN includes all kinds of domain isolated CPUs. This means that HK_TYPE_DOMAIN should always be a subset of HK_TYPE_KERNEL_NOISE (of which HK_TYPE_WQ is only an alias). Therefore sane configurations verify: HK_TYPE_KERNEL_NOISE & HK_TYPE_DOMAIN == HK_TYPE_DOMAIN Simplify the PCI probe target election accordingly. Signed-off-by: Frederic Weisbecker Acked-by: Bjorn Helgaas --- drivers/pci/pci-driver.c | 17 +++-------------- 1 file changed, 3 insertions(+), 14 deletions(-) diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index b902d8adf9a5..a9590601835a 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -384,16 +384,9 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, pci_physfn_is_probed(dev)) { error = local_pci_probe(&ddi); } else { - cpumask_var_t wq_domain_mask; struct pci_probe_arg arg = { .ddi = &ddi }; - if (!zalloc_cpumask_var(&wq_domain_mask, GFP_KERNEL)) { - error = -ENOMEM; - goto out; - } - INIT_WORK_ONSTACK(&arg.work, local_pci_probe_callback); - /* * The target election and the enqueue of the work must be within * the same RCU read side section so that when the workqueue pool @@ -402,12 +395,9 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, * targets. */ rcu_read_lock(); - cpumask_and(wq_domain_mask, - housekeeping_cpumask(HK_TYPE_WQ), - housekeeping_cpumask(HK_TYPE_DOMAIN)); - cpu = cpumask_any_and(cpumask_of_node(node), - wq_domain_mask); + housekeeping_cpumask(HK_TYPE_DOMAIN)); + if (cpu < nr_cpu_ids) { struct workqueue_struct *wq = pci_probe_wq; @@ -422,10 +412,9 @@ static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, error = local_pci_probe(&ddi); } - free_cpumask_var(wq_domain_mask); destroy_work_on_stack(&arg.work); } -out: + dev->is_probed = 0; cpu_hotplug_enable(); return error; -- 2.51.1