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 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 unsigned long phys_index); 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 register_one_node(int nid)49 static inline int register_one_node(int nid) 50 { 51 return 0; 52 } unregister_one_node(int nid)53 static inline int unregister_one_node(int nid) 54 { 55 return 0; 56 } register_cpu_under_node(unsigned int cpu,unsigned int nid)57 static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) 58 { 59 return 0; 60 } unregister_cpu_under_node(unsigned int cpu,unsigned int nid)61 static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) 62 { 63 return 0; 64 } register_mem_sect_under_node(struct memory_block * mem_blk,int nid)65 static inline int register_mem_sect_under_node(struct memory_block *mem_blk, 66 int nid) 67 { 68 return 0; 69 } unregister_mem_sect_under_nodes(struct memory_block * mem_blk,unsigned long phys_index)70 static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, 71 unsigned long phys_index) 72 { 73 return 0; 74 } 75 register_hugetlbfs_with_node(node_registration_func_t reg,node_registration_func_t unreg)76 static 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