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driver core: add way to get to bus kset

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This allows an easier way to get to the kset 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.

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 cc972e896b
commit 0fed80f7a6
3 changed files with 12 additions and 1 deletions
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6
drivers/base/bus.c
View File

@ -935,6 +935,12 @@ int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)
}
EXPORT_SYMBOL_GPL(bus_unregister_notifier);
struct kset *bus_get_kset(struct bus_type *bus)
{
return &bus->subsys;
}
EXPORT_SYMBOL_GPL(bus_get_kset);
int __init buses_init(void)
{
bus_kset = kset_create_and_add("bus", &bus_uevent_ops, NULL);

5
drivers/pci/hotplug/pci_hotplug_core.c
View File

@ -699,9 +699,12 @@ int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot,
static int __init pci_hotplug_init (void)
{
int result;
struct kset *pci_bus_kset;
pci_bus_kset = bus_get_kset(&pci_bus_type);
pci_hotplug_slots_kset = kset_create_and_add("slots", NULL,
&pci_bus_type.subsys.kobj);
&pci_bus_kset->kobj);
if (!pci_hotplug_slots_kset) {
result = -ENOMEM;
err("Register subsys error\n");

2
include/linux/device.h
View File

@ -117,6 +117,8 @@ extern int bus_unregister_notifier(struct bus_type *bus,
#define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be
unbound */
extern struct kset *bus_get_kset(struct bus_type *bus);
struct device_driver {
const char * name;
struct bus_type * bus;