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 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 unsigned long phys_index); 44 45 #ifdef CONFIG_HUGETLBFS 46 extern void register_hugetlbfs_with_node(node_registration_func_t doregister, 47 node_registration_func_t unregister); 48 #endif 49 #else 50 static inline int register_one_node(int nid) 51 { 52 return 0; 53 } 54 static inline int unregister_one_node(int nid) 55 { 56 return 0; 57 } 58 static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) 59 { 60 return 0; 61 } 62 static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) 63 { 64 return 0; 65 } 66 static inline int register_mem_sect_under_node(struct memory_block *mem_blk, 67 int nid) 68 { 69 return 0; 70 } 71 static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, 72 unsigned long phys_index) 73 { 74 return 0; 75 } 76 77 static 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