1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 7d8a7ce73fb3..ed3e8a2be64a 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -724,6 +724,8 @@ int bus_register(struct bus_type * bus)
 {
         int retval;
 
+        BLOCKING_INIT_NOTIFIER_HEAD(&bus->bus_notifier);
+
         retval = kobject_set_name(&bus->subsys.kset.kobj, "%s", bus->name);
         if (retval)
                 goto out;
@@ -782,6 +784,18 @@ void bus_unregister(struct bus_type * bus)
         subsystem_unregister(&bus->subsys);
 }
 
+int bus_register_notifier(struct bus_type *bus, struct notifier_block *nb)
+{
+        return blocking_notifier_chain_register(&bus->bus_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(bus_register_notifier);
+
+int bus_unregister_notifier(struct bus_type *bus, struct notifier_block *nb)
+{
+        return blocking_notifier_chain_unregister(&bus->bus_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(bus_unregister_notifier);
+
 int __init buses_init(void)
 {
         return subsystem_register(&bus_subsys);