Subject: Driver core: unregister_node() for hotplug use

From: Keiichiro Tokunaga <[email-masked]>
Date: Sun, 08 May 2005 21:28:53 +0900

This adds a generic function 'unregister_node()'.
It is used to remove objects of a node going away
for hotplug.  All the devices on the node must be
unregistered before calling this function.

Signed-off-by: Keiichiro Tokunaga <[email-masked]>
Signed-off-by: Greg Kroah-Hartman <[email-masked]>

diff -puN drivers/base/node.c~numa_hp_base drivers/base/node.c
--- linux-2.6.12-rc3-mm3/drivers/base/node.c~numa_hp_base	2005-05-07 19:58:15.000000000 +0900
+++ linux-2.6.12-rc3-mm3-kei/drivers/base/node.c	2005-05-08 20:27:32.000000000 +0900
@@ -136,7 +136,7 @@ static SYSDEV_ATTR(distance, S_IRUGO, no
  *
  * Initialize and register the node device.
  */
-int __init register_node(struct node *node, int num, struct node *parent)
+int register_node(struct node *node, int num, struct node *parent)
 {
 	int error;
 
@@ -153,8 +153,24 @@ int __init register_node(struct node *no
 	return error;
 }
 
+/**
+ * unregister_node - unregister a node device
+ * @node: node going away
+ *
+ * Unregisters a node device @node.  All the devices on the node must be
+ * unregistered before calling this function.
+ */
+void unregister_node(struct node *node)
+{
+	sysdev_remove_file(&node->sysdev, &attr_cpumap);
+	sysdev_remove_file(&node->sysdev, &attr_meminfo);
+	sysdev_remove_file(&node->sysdev, &attr_numastat);
+	sysdev_remove_file(&node->sysdev, &attr_distance);
+
+	sysdev_unregister(&node->sysdev);
+}
 
-int __init register_node_type(void)
+static int __init register_node_type(void)
 {
 	return sysdev_class_register(&node_class);
 }
diff -puN include/linux/node.h~numa_hp_base include/linux/node.h
--- linux-2.6.12-rc3-mm3/include/linux/node.h~numa_hp_base	2005-05-07 19:58:15.000000000 +0900
+++ linux-2.6.12-rc3-mm3-kei/include/linux/node.h	2005-05-07 19:58:15.000000000 +0900
@@ -27,6 +27,7 @@ struct node {
 };
 
 extern int register_node(struct node *, int, struct node *);
+extern void unregister_node(struct node *node);
 
 #define to_node(sys_device) container_of(sys_device, struct node, sysdev)

_