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 void unregister_node(struct node *node);
  34#ifdef CONFIG_NUMA
  35extern int register_one_node(int nid);
  36extern void unregister_one_node(int nid);
  37extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
  38extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
  39extern int register_mem_sect_under_node(struct memory_block *mem_blk,
  40                                                int nid);
  41extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
  42                                           unsigned long phys_index);
  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                                                  unsigned long phys_index)
  72{
  73        return 0;
  74}
  75
  76static 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
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