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
21 struct 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
29 struct memory_block;
30 extern struct node node_devices[];
31 typedef void (*node_registration_func_t)(struct node *);
32
33 extern int register_node(struct node *, int, struct node *);
34 extern void unregister_node(struct node *node);
35 #ifdef CONFIG_NUMA
36 extern int register_one_node(int nid);
37 extern void unregister_one_node(int nid);
38 extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
39 extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
40 extern int register_mem_sect_under_node(struct memory_block *mem_blk,
41 int nid);
42 extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
43 unsigned long phys_index);
44
45 #ifdef CONFIG_HUGETLBFS
46 extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
47 node_registration_func_t unregister);
48 #endif
49 #else
register_one_node(int nid)50 static inline int register_one_node(int nid)
51 {
52 return 0;
53 }
unregister_one_node(int nid)54 static inline int unregister_one_node(int nid)
55 {
56 return 0;
57 }
register_cpu_under_node(unsigned int cpu,unsigned int nid)58 static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
59 {
60 return 0;
61 }
unregister_cpu_under_node(unsigned int cpu,unsigned int nid)62 static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
63 {
64 return 0;
65 }
register_mem_sect_under_node(struct memory_block * mem_blk,int nid)66 static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
67 int nid)
68 {
69 return 0;
70 }
unregister_mem_sect_under_nodes(struct memory_block * mem_blk,unsigned long phys_index)71 static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
72 unsigned long phys_index)
73 {
74 return 0;
75 }
76
register_hugetlbfs_with_node(node_registration_func_t reg,node_registration_func_t unreg)77 static 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(device) container_of(device, struct node, dev)
84
85 #endif /* _LINUX_NODE_H_ */
86