linux/include/linux/node.h
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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/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 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(device) container_of(device, struct node, dev)
  84
  85#endif /* _LINUX_NODE_H_ */
  86
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