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