From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6F85315539A; Fri, 8 May 2026 04:36:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778215014; cv=none; b=SPbdWYWO/8GYM8RXjek3p1/RbOn71IQHpP5866qU4COaVzou+0hshPxYxkwQW234sXwjKK80WFqekNGiJh/cW3CmZx/iJVEWPOoY1jRH25OysTTHo8BlrwEWJbdyFn8E9nThphPKetsFn1A7yNF6wTMUX9nPG0eiV28PV/dUfpU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778215014; c=relaxed/simple; bh=1zw81hO7qNDmjDVjmUUREGP1A7JGam91C2/JOoVX2TQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=S4SWEvQs7iln5pJA3IfctxQlNWYZLFdvJS2Wqx1tMEwjtcEj+fnZ6kOh6SpQJXpZoDzulXs+cG05DVAmKeYWzZF8S6jS1LCqYDnCkkvlMIEgSpE8XoflN4Yk182k71Uw1ac5yh+Pt3vjb4IeK6DzlzlysTKSR8HXZ9rPT0tRO9Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=G87wYP+d; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="G87wYP+d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 08428C2BCB4; Fri, 8 May 2026 04:36:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778215014; bh=1zw81hO7qNDmjDVjmUUREGP1A7JGam91C2/JOoVX2TQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G87wYP+djPaAh1XGky23G1sU/NLdnOztzWEtPa//4Dc18yNt/bGn3aktxg8nJTYRO PKybfpp6Ftf2MOgS+3Iqqc1q8+odvp3kKX2tHUJsqtGFz5gq72DVnyekU2mJ3TuS9S OuIjLdw9qz022XRtoj3k2r+Fx6OgGK/7nxPrCpEOTkbvI1xGoS3c5S0jgFYoGqQFcy DBxUnGe+WblKqFoVtgpF1+ABq0w/wbIcC/q1E5188U8gKXDddb5nFgmJP7z7DQ9uqR EGXMCxXLefLpyr9KUzWOrw18akJu1/XHgf4xPTquQgXHyYNJry0lTaAgp3lpe/a39i Lwtin3nvTzk4Q== From: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Alex Williamson , Magnus Lindholm , Matt Turner , Richard Henderson , Christophe Leroy , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Dexuan Cui , =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= , Lukas Wunner , "Oliver O'Halloran" , Saurabh Singh Sengar , Shuan He , Srivatsa Bhat , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v7 18/24] PCI/sysfs: Remove pci_{create,remove}_sysfs_dev_files() Date: Fri, 8 May 2026 04:35:37 +0000 Message-ID: <20260508043543.217179-19-kwilczynski@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260508043543.217179-1-kwilczynski@kernel.org> References: <20260508043543.217179-1-kwilczynski@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, pci_create_sysfs_dev_files() and pci_remove_sysfs_dev_files() are no-op stubs. With both the generic and Alpha resource files now handled by static attribute groups, no platform needs dynamic per-device sysfs file creation. Thus, remove both functions, their declarations, and the call sites in pci_bus_add_device() and pci_stop_dev(). Remove __weak pci_create_resource_files() and pci_remove_resource_files() stubs and their declarations in pci.h, as no architecture overrides them anymore. Remove the res_attr[] and res_attr_wc[] fields from struct pci_dev which were used to track dynamically allocated resource attributes. Finally, simplify pci_sysfs_init() to only handle legacy file creation under HAVE_PCI_LEGACY, removing the per-device loop and the HAVE_PCI_SYSFS_INIT helper added earlier. Tested-by: Shivaprasad G Bhat Signed-off-by: Krzysztof Wilczyński --- drivers/pci/bus.c | 1 - drivers/pci/pci-sysfs.c | 52 ++--------------------------------------- drivers/pci/pci.h | 4 ---- drivers/pci/remove.c | 1 - include/linux/pci.h | 9 ------- 5 files changed, 2 insertions(+), 65 deletions(-) diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 6c1ad1f542d9..655ed53436d3 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -354,7 +354,6 @@ void pci_bus_add_device(struct pci_dev *dev) pci_fixup_device(pci_fixup_final, dev); if (pci_is_bridge(dev)) of_pci_make_dev_node(dev); - pci_create_sysfs_dev_files(dev); pci_proc_attach_device(dev); pci_bridge_d3_update(dev); diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 225c3d0db74e..a6451bbf69a8 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -37,12 +37,7 @@ #define ARCH_PCI_DEV_GROUPS #endif -#if defined(HAVE_PCI_LEGACY) || \ - !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) -#define HAVE_PCI_SYSFS_INIT -#endif - -#ifdef HAVE_PCI_SYSFS_INIT +#ifdef HAVE_PCI_LEGACY static int sysfs_initialized; /* = 0 */ #endif @@ -1377,8 +1372,6 @@ static const struct attribute_group *pci_dev_resource_attr_groups[] = { }; #else #define pci_dev_resource_attr_groups NULL -int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; } -void __weak pci_remove_resource_files(struct pci_dev *dev) { } #endif /** @@ -1748,54 +1741,13 @@ static const struct attribute_group pci_dev_resource_resize_attr_group = { .is_visible = resource_resize_attr_is_visible, }; -#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) -int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; } -void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { } -#else -int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev) -{ - if (!sysfs_initialized) - return -EACCES; - - return pci_create_resource_files(pdev); -} - -/** - * pci_remove_sysfs_dev_files - cleanup PCI specific sysfs files - * @pdev: device whose entries we should free - * - * Cleanup when @pdev is removed from sysfs. - */ -void pci_remove_sysfs_dev_files(struct pci_dev *pdev) -{ - if (!sysfs_initialized) - return; - - pci_remove_resource_files(pdev); -} -#endif - -#ifdef HAVE_PCI_SYSFS_INIT +#ifdef HAVE_PCI_LEGACY static int __init pci_sysfs_init(void) { -#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) struct pci_bus *pbus = NULL; sysfs_initialized = 1; -#else - struct pci_dev *pdev = NULL; - struct pci_bus *pbus = NULL; - int retval; - sysfs_initialized = 1; - for_each_pci_dev(pdev) { - retval = pci_create_sysfs_dev_files(pdev); - if (retval) { - pci_dev_put(pdev); - return retval; - } - } -#endif while ((pbus = pci_find_next_bus(pbus))) pci_create_legacy_files(pbus); diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 4a14f88e543a..71a1fde1e505 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -393,16 +393,12 @@ static inline int pci_no_d1d2(struct pci_dev *dev) } #ifdef CONFIG_SYSFS -int pci_create_sysfs_dev_files(struct pci_dev *pdev); -void pci_remove_sysfs_dev_files(struct pci_dev *pdev); extern const struct attribute_group *pci_dev_groups[]; extern const struct attribute_group *pci_dev_attr_groups[]; extern const struct attribute_group *pcibus_groups[]; extern const struct attribute_group *pci_bus_groups[]; extern const struct attribute_group pci_doe_sysfs_group; #else -static inline int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; } -static inline void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { } #define pci_dev_groups NULL #define pci_dev_attr_groups NULL #define pcibus_groups NULL diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index e9d519993853..6e796dbc5b29 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -26,7 +26,6 @@ static void pci_stop_dev(struct pci_dev *dev) device_release_driver(&dev->dev); pci_proc_detach_device(dev); - pci_remove_sysfs_dev_files(dev); of_pci_remove_node(dev); } diff --git a/include/linux/pci.h b/include/linux/pci.h index b998a56f6010..c56f2cf0d2ab 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -515,10 +515,6 @@ struct pci_dev { spinlock_t pcie_cap_lock; /* Protects RMW ops in capability accessors */ u32 saved_config_space[16]; /* Config space saved at suspend time */ struct hlist_head saved_cap_space; -#if !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) - struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */ - struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */ -#endif #ifdef CONFIG_HOTPLUG_PCI_PCIE unsigned int broken_cmd_compl:1; /* No compl for some cmds */ @@ -2533,11 +2529,6 @@ int pcibios_alloc_irq(struct pci_dev *dev); void pcibios_free_irq(struct pci_dev *dev); resource_size_t pcibios_default_alignment(void); -#if !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE) -extern int pci_create_resource_files(struct pci_dev *dev); -extern void pci_remove_resource_files(struct pci_dev *dev); -#endif - #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG) void __init pci_mmcfg_early_init(void); void __init pci_mmcfg_late_init(void); -- 2.54.0