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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
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{
72 return 0;
73}
74
75static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
76 node_registration_func_t unreg)
77{
78}
79#endif
80
81#define to_node(sys_device) container_of(sys_device, struct node, sysdev)
82
83#endif /* _LINUX_NODE_H_ */