{"id":2221667,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2221667/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260410055040.39233-9-kwilczynski@kernel.org/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.1/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260410055040.39233-9-kwilczynski@kernel.org>","date":"2026-04-10T05:50:28","name":"[08/20] PCI/sysfs: Add stubs for pci_{create,remove}_sysfs_dev_files()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"dd6286cbbef3bb398519b1f37794db81b6594169","submitter":{"id":86709,"url":"http://patchwork.ozlabs.org/api/1.1/people/86709/?format=json","name":"Krzysztof Wilczyński","email":"kwilczynski@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260410055040.39233-9-kwilczynski@kernel.org/mbox/","series":[{"id":499398,"url":"http://patchwork.ozlabs.org/api/1.1/series/499398/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=499398","date":"2026-04-10T05:50:21","name":"PCI: Convert all dynamic sysfs attributes to static","version":1,"mbox":"http://patchwork.ozlabs.org/series/499398/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2221667/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2221667/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=ceRd9YGA;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.232.135.74; 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charset=UTF-8","Content-Transfer-Encoding":"8bit"},"content":"On platforms with HAVE_PCI_MMAP or ARCH_GENERIC_PCI_MMAP_RESOURCE,\nresource files are now handled by static attribute groups registered\nvia pci_dev_groups[].\n\nThus, the pci_create_sysfs_dev_files() and pci_remove_sysfs_dev_files()\ncan now be stubbed out, as the dynamic resource file creation is no\nlonger needed.\n\nAlso, simplify pci_sysfs_init() on these platforms to only iterate\nbuses for legacy attributes creation, skipping the per-device loop.\n\nMove the __weak stubs for pci_create_resource_files() and\npci_remove_resource_files() into the #else branch since only platforms\nwithout HAVE_PCI_MMAP (such as Alpha architecture) still need them.\nGuard the res_attr[] and res_attr_wc[] fields in struct pci_dev the\nsame way.\n\nSigned-off-by: Krzysztof Wilczyński \n---\n drivers/pci/pci-sysfs.c | 16 +++++++++++++---\n include/linux/pci.h | 4 ++++\n 2 files changed, 17 insertions(+), 3 deletions(-)","diff":"diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c\nindex 1fabd0baeb56..e200514bbaed 100644\n--- a/drivers/pci/pci-sysfs.c\n+++ b/drivers/pci/pci-sysfs.c\n@@ -1392,10 +1392,10 @@ static const struct attribute_group *pci_dev_resource_attr_groups[] = {\n \t&pci_dev_resource_wc_attr_group,\n \tNULL,\n };\n-#endif\n-\n+#else\n int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }\n void __weak pci_remove_resource_files(struct pci_dev *dev) { }\n+#endif\n \n /**\n * pci_write_rom - used to enable access to the PCI ROM display\n@@ -1764,6 +1764,10 @@ static const struct attribute_group pci_dev_resource_resize_attr_group = {\n };\n #endif\n \n+#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)\n+int pci_create_sysfs_dev_files(struct pci_dev *pdev) { return 0; }\n+void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { }\n+#else\n int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev)\n {\n \tif (!sysfs_initialized)\n@@ -1785,9 +1789,15 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)\n \n \tpci_remove_resource_files(pdev);\n }\n+#endif\n \n static int __init pci_sysfs_init(void)\n {\n+#if defined(HAVE_PCI_MMAP) || defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)\n+\tstruct pci_bus *pbus = NULL;\n+\n+\tsysfs_initialized = 1;\n+#else\n \tstruct pci_dev *pdev = NULL;\n \tstruct pci_bus *pbus = NULL;\n \tint retval;\n@@ -1800,7 +1810,7 @@ static int __init pci_sysfs_init(void)\n \t\t\treturn retval;\n \t\t}\n \t}\n-\n+#endif\n \twhile ((pbus = pci_find_next_bus(pbus)))\n \t\tpci_create_legacy_files(pbus);\n \ndiff --git a/include/linux/pci.h b/include/linux/pci.h\nindex a7a104427b07..2940c80fd7c5 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -507,8 +507,10 @@ struct pci_dev {\n \tspinlock_t\tpcie_cap_lock;\t\t/* Protects RMW ops in capability accessors */\n \tu32\t\tsaved_config_space[16]; /* Config space saved at suspend time */\n \tstruct hlist_head saved_cap_space;\n+#if !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)\n \tstruct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */\n \tstruct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */\n+#endif\n \n #ifdef CONFIG_HOTPLUG_PCI_PCIE\n \tunsigned int\tbroken_cmd_compl:1;\t/* No compl for some cmds */\n@@ -2501,8 +2503,10 @@ int pcibios_alloc_irq(struct pci_dev *dev);\n void pcibios_free_irq(struct pci_dev *dev);\n resource_size_t pcibios_default_alignment(void);\n \n+#if !defined(HAVE_PCI_MMAP) && !defined(ARCH_GENERIC_PCI_MMAP_RESOURCE)\n extern int pci_create_resource_files(struct pci_dev *dev);\n extern void pci_remove_resource_files(struct pci_dev *dev);\n+#endif\n \n #if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)\n void __init pci_mmcfg_early_init(void);\n","prefixes":["08/20"]}