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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/sysdev.h>
18#include <linux/cpumask.h>
19#include <linux/workqueue.h>
20
21struct node {
22 struct sys_device sysdev;
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 int register_node(struct node *, int, struct node *);
34extern void unregister_node(struct node *node);
35#ifdef CONFIG_NUMA
36extern int register_one_node(int nid);
37extern void unregister_one_node(int nid);
38extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
39extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
40extern int register_mem_sect_under_node(struct memory_block *mem_blk,
41 int nid);
42extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
43 unsigned long phys_index);
44
45#ifdef CONFIG_HUGETLBFS
46extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
47 node_registration_func_t unregister);
48#endif
49#else
50static inline int register_one_node(int nid)
51{
52 return 0;
53}
54static inline int unregister_one_node(int nid)
55{
56 return 0;
57}
58static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
59{
60 return 0;
61}
62static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
63{
64 return 0;
65}
66static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
67 int nid)
68{
69 return 0;
70}
71static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
72 unsigned long phys_index)
73{
74 return 0;
75}
76
77static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
78 node_registration_func_t unreg)
79{
80}
81#endif
82
83#define to_node(sys_device) container_of(sys_device, struct node, sysdev)
84
85#endif /* _LINUX_NODE_H_ */