1 files changed, 38 insertions, 1 deletions

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 3b269f7e5213..1b645886e9eb 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -18,6 +18,43 @@
 #define to_dev(node) container_of(node, struct device, driver_list)
 #define to_drv(obj) container_of(obj, struct device_driver, kobj)
 
+
+static struct device * next_device(struct klist_iter * i)
+{
+        struct klist_node * n = klist_next(i);
+        return n ? container_of(n, struct device, knode_driver) : NULL;
+}
+
+/**
+ *      driver_for_each_device - Iterator for devices bound to a driver.
+ *      @drv:   Driver we're iterating.
+ *      @data:  Data to pass to the callback.
+ *      @fn:    Function to call for each device.
+ *
+ *      Iterate over the @drv's list of devices calling @fn for each one.
+ */
+
+int driver_for_each_device(struct device_driver * drv, struct device * start, 
+                           void * data, int (*fn)(struct device *, void *))
+{
+        struct klist_iter i;
+        struct device * dev;
+        int error = 0;
+
+        if (!drv)
+                return -EINVAL;
+
+        klist_iter_init_node(&drv->klist_devices, &i,
+                             start ? &start->knode_driver : NULL);
+        while ((dev = next_device(&i)) && !error)
+                error = fn(dev, data);
+        klist_iter_exit(&i);
+        return error;
+}
+
+EXPORT_SYMBOL_GPL(driver_for_each_device);
+
+
 /**
  *      driver_create_file - create sysfs file for driver.
  *      @drv:   driver.
@@ -85,7 +122,7 @@ void put_driver(struct device_driver * drv)
  */
 int driver_register(struct device_driver * drv)
 {
-        INIT_LIST_HEAD(&drv->devices);
+        klist_init(&drv->klist_devices);
         init_completion(&drv->unloaded);
         return bus_add_driver(drv);
 }