driver core: add way to get to bus kset

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>

3 files changed, 12 insertions, 1 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 871607b7c876..8335a1079b0e 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -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);
diff --git a/drivers/pci/hotplug/pci_hotplug_core.c b/drivers/pci/hotplug/pci_hotplug_core.c
index 0f05e6a68b3b..3606d5b52a70 100644
--- a/drivers/pci/hotplug/pci_hotplug_core.c
+++ b/drivers/pci/hotplug/pci_hotplug_core.c
@@ -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");
diff --git a/include/linux/device.h b/include/linux/device.h
index 313e0b32bc09..3cc13c32314a 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -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;