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PCI/sysfs: Remove pci_create_legacy_files() and pci_sysfs_init()

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Currently, pci_create_legacy_files() and pci_remove_legacy_files() are
no-op stubs.  With legacy attributes now handled by static groups
registered via pcibus_groups[], no call site needs them.

Remove both functions, their declarations, and the call sites in
pci_register_host_bridge(), pci_alloc_child_bus(), and pci_remove_bus().

Remove the pci_sysfs_init() late_initcall and sysfs_initialized.  The
late_initcall originally existed to create all the dynamic PCI sysfs files,
but with both resource and legacy attributes now handled by static groups,
it is no longer needed.

Remove the legacy_io and legacy_mem fields from struct pci_bus which were
used to track the dynamically allocated legacy attributes.

Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Link: https://patch.msgid.link/20260508043543.217179-24-kwilczynski@kernel.org
This commit is contained in:
Krzysztof Wilczyński
2026-05-08 04:35:42 +00:00
committed by Bjorn Helgaas
parent 4e14b965a6
commit 2800a911ce
5 changed files with 0 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/pci/pci-sysfs.c
View File

@@ -37,10 +37,6 @@
#define ARCH_PCI_DEV_GROUPS
#endif
#ifdef HAVE_PCI_LEGACY
static int sysfs_initialized; /* = 0 */
#endif
/* show configuration fields */
#define pci_config_attr(field, format_string) \
static ssize_t \
@@ -1094,8 +1090,6 @@ static const struct attribute_group pci_legacy_mem_sparse_group = {
.is_bin_visible = pci_legacy_mem_sparse_is_visible,
};
void pci_create_legacy_files(struct pci_bus *b) { }
void pci_remove_legacy_files(struct pci_bus *b) { }
#endif /* HAVE_PCI_LEGACY */
const struct attribute_group *pcibus_groups[] = {
@@ -1782,21 +1776,6 @@ static const struct attribute_group pci_dev_resource_resize_attr_group = {
.is_visible = resource_resize_attr_is_visible,
};
#ifdef HAVE_PCI_LEGACY
static int __init pci_sysfs_init(void)
{
struct pci_bus *pbus = NULL;
sysfs_initialized = 1;
while ((pbus = pci_find_next_bus(pbus)))
pci_create_legacy_files(pbus);
return 0;
}
late_initcall(pci_sysfs_init);
#endif
static struct attribute *pci_dev_dev_attrs[] = {
&dev_attr_boot_vga.attr,
&dev_attr_serial_number.attr,

8
drivers/pci/pci.h
View File

@@ -358,14 +358,6 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
int pci_hp_add_bridge(struct pci_dev *dev);
bool pci_hp_spurious_link_change(struct pci_dev *pdev);
#if defined(CONFIG_SYSFS) && defined(HAVE_PCI_LEGACY)
void pci_create_legacy_files(struct pci_bus *bus);
void pci_remove_legacy_files(struct pci_bus *bus);
#else
static inline void pci_create_legacy_files(struct pci_bus *bus) { }
static inline void pci_remove_legacy_files(struct pci_bus *bus) { }
#endif
/* Lock for read/write access to pci device and bus lists */
extern struct rw_semaphore pci_bus_sem;
extern struct mutex pci_slot_mutex;

6
drivers/pci/probe.c
View File

@@ -1073,9 +1073,6 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge)
dev_err(&bus->dev, "failed to add bus: %d\n", err);
}
/* Create legacy_io and legacy_mem files for this bus */
pci_create_legacy_files(bus);
if (parent)
dev_info(parent, "PCI host bridge to bus %s\n", name);
else
@@ -1281,9 +1278,6 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
dev_err(&child->dev, "failed to add bus: %d\n", ret);
}
/* Create legacy_io and legacy_mem files for this bus */
pci_create_legacy_files(child);
return child;
}

2
drivers/pci/remove.c
View File

@@ -65,8 +65,6 @@ void pci_remove_bus(struct pci_bus *bus)
list_del(&bus->node);
pci_bus_release_busn_res(bus);
up_write(&pci_bus_sem);
pci_remove_legacy_files(bus);
if (bus->ops->remove_bus)
bus->ops->remove_bus(bus);

2
include/linux/pci.h
View File

@@ -726,8 +726,6 @@ struct pci_bus {
pci_bus_flags_t bus_flags; /* Inherited by child buses */
struct device *bridge;
struct device dev;
struct bin_attribute *legacy_io; /* Legacy I/O for this bus */
struct bin_attribute *legacy_mem; /* Legacy mem */
unsigned int is_added:1;
unsigned int unsafe_warn:1; /* warned about RW1C config write */
unsigned int flit_mode:1; /* Link in Flit mode */