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driver core: add way to get to bus device klist

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This allows an easier way to get to the device klist associated with a
struct bus_type (you have three to choose from...)  This will make it
easier to move these fields to be dynamic in a future patch.

The only user of this is the PCI core which horribly abuses this
interface to rearrange the order of the pci devices.  This should be
done using the existing bus device walking functions, but that's left
for future patches.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-11-01 19:41:16 -07:00
parent 0fed80f7a6
commit b249072ee6
3 changed files with 14 additions and 4 deletions
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6
drivers/base/bus.c
View file

@ -941,6 +941,12 @@ struct kset *bus_get_kset(struct bus_type *bus)
}
EXPORT_SYMBOL_GPL(bus_get_kset);
struct klist *bus_get_device_klist(struct bus_type *bus)
{
return &bus->klist_devices;
}
EXPORT_SYMBOL_GPL(bus_get_device_klist);
int __init buses_init(void)
{
bus_kset = kset_create_and_add("bus", &bus_uevent_ops, NULL);

11
drivers/pci/probe.c
View file

@ -1210,16 +1210,19 @@ static void __init pci_sort_breadthfirst_klist(void)
struct klist_node *n;
struct device *dev;
struct pci_dev *pdev;
struct klist *device_klist;
spin_lock(&pci_bus_type.klist_devices.k_lock);
list_for_each_safe(pos, tmp, &pci_bus_type.klist_devices.k_list) {
device_klist = bus_get_device_klist(&pci_bus_type);
spin_lock(&device_klist->k_lock);
list_for_each_safe(pos, tmp, &device_klist->k_list) {
n = container_of(pos, struct klist_node, n_node);
dev = container_of(n, struct device, knode_bus);
pdev = to_pci_dev(dev);
pci_insertion_sort_klist(pdev, &sorted_devices);
}
list_splice(&sorted_devices, &pci_bus_type.klist_devices.k_list);
spin_unlock(&pci_bus_type.klist_devices.k_lock);
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)

1
include/linux/device.h
View file

@ -118,6 +118,7 @@ extern int bus_unregister_notifier(struct bus_type *bus,
unbound */
extern struct kset *bus_get_kset(struct bus_type *bus);
extern struct klist *bus_get_device_klist(struct bus_type *bus);
struct device_driver {
const char * name;