include/linux/node.h

   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  * Per-node interfaces can be implemented using a struct device_interface.
  15  * See the following for how to do this:
  16  * - drivers/base/intf.c
  17  * - Documentation/driver-model/interface.txt
  18  */
  19 #ifndef _LINUX_NODE_H_
  20 #define _LINUX_NODE_H_
  21
  22 #include <linux/sysdev.h>
  23 #include <linux/cpumask.h>
  24
  25 struct node {
  26         struct sys_device       sysdev;
  27 };
  28
  29 struct memory_block;
  30 extern struct node node_devices[];
  31
  32 extern int register_node(struct node *, int, struct node *);
  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 #else
  43 static inline int register_one_node(int nid)
  44 {
  45         return 0;
  46 }
  47 static inline int unregister_one_node(int nid)
  48 {
  49         return 0;
  50 }
  51 static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
  52 {
  53         return 0;
  54 }
  55 static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
  56 {
  57         return 0;
  58 }
  59 static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
  60                                                         int nid)
  61 {
  62         return 0;
  63 }
  64 static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk)
  65 {
  66         return 0;
  67 }
  68 #endif
  69
  70 #define to_node(sys_device) container_of(sys_device, struct node, sysdev)
  71
  72 #endif /* _LINUX_NODE_H_ */