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PCI: remove global list of PCI devices

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This patch finally removes the global list of PCI devices.  We are
relying entirely on the list held in the driver core now, and do not
need a separate "shadow" list as no one uses it.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2008-02-14 14:56:56 -08:00
parent c71c68a04b
commit 5ff580c10e
4 changed files with 1 additions and 49 deletions
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4
drivers/pci/bus.c
View File

@ -85,10 +85,6 @@ int pci_bus_add_device(struct pci_dev *dev)
return retval;
dev->is_added = 1;
down_write(&pci_bus_sem);
list_add_tail(&dev->global_list, &pci_devices);
up_write(&pci_bus_sem);
pci_proc_attach_device(dev);
pci_create_sysfs_dev_files(dev);
return 0;

39
drivers/pci/probe.c
View File

@ -20,8 +20,6 @@
LIST_HEAD(pci_root_buses);
EXPORT_SYMBOL(pci_root_buses);
LIST_HEAD(pci_devices);
static int find_anything(struct device *dev, void *data)
{
@ -860,7 +858,6 @@ struct pci_dev *alloc_pci_dev(void)
if (!dev)
return NULL;
INIT_LIST_HEAD(&dev->global_list);
INIT_LIST_HEAD(&dev->bus_list);
pci_msi_init_pci_dev(dev);
@ -957,7 +954,6 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
* Add the device to our list of discovered devices
* and the bus list for fixup functions, etc.
*/
INIT_LIST_HEAD(&dev->global_list);
down_write(&pci_bus_sem);
list_add_tail(&dev->bus_list, &bus->devices);
up_write(&pci_bus_sem);
@ -1186,7 +1182,7 @@ static void __init pci_insertion_sort_klist(struct pci_dev *a, struct list_head
list_move_tail(&a->dev.knode_bus.n_node, list);
}
static void __init pci_sort_breadthfirst_klist(void)
void __init pci_sort_breadthfirst(void)
{
LIST_HEAD(sorted_devices);
struct list_head *pos, *tmp;
@ -1207,36 +1203,3 @@ static void __init pci_sort_breadthfirst_klist(void)
list_splice(&sorted_devices, &device_klist->k_list);
spin_unlock(&device_klist->k_lock);
}
static void __init pci_insertion_sort_devices(struct pci_dev *a, struct list_head *list)
{
struct pci_dev *b;
list_for_each_entry(b, list, global_list) {
if (pci_sort_bf_cmp(a, b) <= 0) {
list_move_tail(&a->global_list, &b->global_list);
return;
}
}
list_move_tail(&a->global_list, list);
}
static void __init pci_sort_breadthfirst_devices(void)
{
LIST_HEAD(sorted_devices);
struct pci_dev *dev, *tmp;
down_write(&pci_bus_sem);
list_for_each_entry_safe(dev, tmp, &pci_devices, global_list) {
pci_insertion_sort_devices(dev, &sorted_devices);
}
list_splice(&sorted_devices, &pci_devices);
up_write(&pci_bus_sem);
}
void __init pci_sort_breadthfirst(void)
{
pci_sort_breadthfirst_devices();
pci_sort_breadthfirst_klist();
}

4
drivers/pci/remove.c
View File

@ -23,10 +23,6 @@ static void pci_stop_dev(struct pci_dev *dev)
pci_remove_sysfs_dev_files(dev);
device_unregister(&dev->dev);
dev->is_added = 0;
down_write(&pci_bus_sem);
list_del(&dev->global_list);
dev->global_list.next = dev->global_list.prev = NULL;
up_write(&pci_bus_sem);
}
}

3
include/linux/pci.h
View File

@ -132,7 +132,6 @@ struct pci_cap_saved_state {
* The pci_dev structure is used to describe PCI devices.
*/
struct pci_dev {
struct list_head global_list; /* node in list of all PCI devices */
struct list_head bus_list; /* node in per-bus list */
struct pci_bus *bus; /* bus this device is on */
struct pci_bus *subordinate; /* bus this device bridges to */
@ -206,7 +205,6 @@ struct pci_dev {
extern struct pci_dev *alloc_pci_dev(void);
#define pci_dev_g(n) list_entry(n, struct pci_dev, global_list)
#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
#define to_pci_dev(n) container_of(n, struct pci_dev, dev)
#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
@ -450,7 +448,6 @@ extern struct bus_type pci_bus_type;
/* Do NOT directly access these two variables, unless you are arch specific pci
* code, or pci core code. */
extern struct list_head pci_root_buses; /* list of all known PCI buses */
extern struct list_head pci_devices; /* list of all devices */
/* Some device drivers need know if pci is initiated */
extern int no_pci_devices(void);