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/sysdev.h> 18 #include <linux/cpumask.h> 19 #include <linux/workqueue.h> 20 21 struct node { 22 struct sys_device sysdev; 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 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 49 static inline int register_one_node(int nid) 50 { 51 return 0; 52 } 53 static inline int unregister_one_node(int nid) 54 { 55 return 0; 56 } 57 static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) 58 { 59 return 0; 60 } 61 static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) 62 { 63 return 0; 64 } 65 static inline int register_mem_sect_under_node(struct memory_block *mem_blk, 66 int nid) 67 { 68 return 0; 69 } 70 static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk) 71 { 72 return 0; 73 } 74 75 static inline void register_hugetlbfs_with_node(node_registration_func_t reg, 76 node_registration_func_t unreg) 77 { 78 } 79 #endif 80 81 #define to_node(sys_device) container_of(sys_device, struct node, sysdev) 82 83 #endif /* _LINUX_NODE_H_ */ 84