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#ifndef _LINUX_NODE_H_
15#define _LINUX_NODE_H_
16
17#include <linux/device.h>
18#include <linux/cpumask.h>
19#include <linux/workqueue.h>
20
21struct node {
22	struct device	dev;
23
24#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
25	struct work_struct	node_work;
26#endif
27};
28
29struct memory_block;
30extern struct node *node_devices[];
31typedef  void (*node_registration_func_t)(struct node *);
32
33extern void unregister_node(struct node *node);
34#ifdef CONFIG_NUMA
35extern int register_one_node(int nid);
36extern void unregister_one_node(int nid);
37extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
38extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
39extern int register_mem_sect_under_node(struct memory_block *mem_blk,
40						int nid);
41extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
42					   unsigned long phys_index);
43
44#ifdef CONFIG_HUGETLBFS
45extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
46					 node_registration_func_t unregister);
47#endif
48#else
49static inline int register_one_node(int nid)
50{
51	return 0;
52}
53static inline int unregister_one_node(int nid)
54{
55	return 0;
56}
57static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
58{
59	return 0;
60}
61static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
62{
63	return 0;
64}
65static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
66							int nid)
67{
68	return 0;
69}
70static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
71						  unsigned long phys_index)
72{
73	return 0;
74}
75
76static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
77						node_registration_func_t unreg)
78{
79}
80#endif
81
82#define to_node(device) container_of(device, struct node, dev)
83
84#endif /* _LINUX_NODE_H_ */
85