[PATCH] Add a klist to struct bus_type for its devices.

- Use it for bus_for_each_dev().
- Use the klist spinlock instead of the bus rwsem.

Signed-off-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 10f5aa20e041..e36953cf7f14 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -14,6 +14,7 @@
 #include <linux/config.h>
 #include <linux/ioport.h>
 #include <linux/kobject.h>
+#include <linux/klist.h>
 #include <linux/list.h>
 #include <linux/types.h>
 #include <linux/module.h>
@@ -51,6 +52,7 @@ struct bus_type {
         struct subsystem        subsys;
         struct kset             drivers;
         struct kset             devices;
+        struct klist            klist_devices;
 
         struct bus_attribute    * bus_attrs;
         struct device_attribute * dev_attrs;
@@ -262,6 +264,7 @@ struct device {
         struct list_head bus_list;      /* node in bus's list */
         struct list_head driver_list;
         struct list_head children;
+        struct klist_node       knode_bus;
         struct device   * parent;
 
         struct kobject kobj;