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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * include/linux/node.h - generic node definition
3 *
4 * This is mainly for topological representation. We define the
5 * basic 'struct node' here, which can be embedded in per-arch
6 * definitions of processors.
7 *
8 * Basic handling of the devices is done in drivers/base/node.c
9 * and system devices are handled in drivers/base/sys.c.
10 *
11 * Nodes are exported via driverfs in the class/node/devices/
12 * directory.
13 *
14 * Per-node interfaces can be implemented using a struct device_interface.
15 * See the following for how to do this:
16 * - drivers/base/intf.c
17 * - Documentation/driver-model/interface.txt
18 */
19#ifndef _LINUX_NODE_H_
20#define _LINUX_NODE_H_
21
22#include <linux/sysdev.h>
23#include <linux/cpumask.h>
24
25struct node {
26 struct sys_device sysdev;
27};
28
Yasunori Goto0fc44152006-06-27 02:53:38 -070029extern struct node node_devices[];
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031extern int register_node(struct node *, int, struct node *);
Keiichiro Tokunaga4b450992005-05-08 21:28:53 +090032extern void unregister_node(struct node *node);
KAMEZAWA Hiroyuki36920e02006-08-27 01:23:52 -070033#ifdef CONFIG_NUMA
Yasunori Goto0fc44152006-06-27 02:53:38 -070034extern int register_one_node(int nid);
35extern void unregister_one_node(int nid);
KAMEZAWA Hiroyuki76b67ed92006-06-27 02:53:41 -070036extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
37extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
38#else
KAMEZAWA Hiroyuki36920e02006-08-27 01:23:52 -070039static inline int register_one_node(int nid)
40{
41 return 0;
42}
43static inline int unregister_one_node(int nid)
44{
45 return 0;
46}
KAMEZAWA Hiroyuki76b67ed92006-06-27 02:53:41 -070047static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
48{
49 return 0;
50}
51static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
52{
53 return 0;
54}
55#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57#define to_node(sys_device) container_of(sys_device, struct node, sysdev)
58
59#endif /* _LINUX_NODE_H_ */