1 /*
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
25 struct node {
26 struct sys_device sysdev;
27 };
28
29 extern struct node node_devices[];
30
31 extern int register_node(struct node *, int, struct node *);
32 extern void unregister_node(struct node *node);
33 #ifdef CONFIG_NUMA
34 extern int register_one_node(int nid);
35 extern void unregister_one_node(int nid);
36 extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
37 extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
38 #else
register_one_node(int nid)39 static inline int register_one_node(int nid)
40 {
41 return 0;
42 }
unregister_one_node(int nid)43 static inline int unregister_one_node(int nid)
44 {
45 return 0;
46 }
register_cpu_under_node(unsigned int cpu,unsigned int nid)47 static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
48 {
49 return 0;
50 }
unregister_cpu_under_node(unsigned int cpu,unsigned int nid)51 static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
52 {
53 return 0;
54 }
55 #endif
56
57 #define to_node(sys_device) container_of(sys_device, struct node, sysdev)
58
59 #endif /* _LINUX_NODE_H_ */
60