[PATCH] Driver core: unregister_node() for hotplug use
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 <tokunaga.keiich@jp.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff -puN drivers/base/node.c~numa_hp_base drivers/base/node.c
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 583d57e..5d4517c 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -136,7 +136,7 @@
*
* 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 @@
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);
-int __init register_node_type(void)
+ sysdev_unregister(&node->sysdev);
+}
+
+static int __init register_node_type(void)
{
return sysdev_class_register(&node_class);
}
diff --git a/include/linux/node.h b/include/linux/node.h
index 6e0a697..254dc3d 100644
--- a/include/linux/node.h
+++ b/include/linux/node.h
@@ -27,6 +27,7 @@
};
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)