| 1 | |
| 2 | * include/linux/node.h - generic node definition
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| 3 | *
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| 4 | * This is mainly for topological representation. We define the
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| 5 | * basic 'struct node' here, which can be embedded in per-arch
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| 6 | * definitions of processors.
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| 7 | *
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| 8 | * Basic handling of the devices is done in drivers/base/node.c
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| 9 | * and system devices are handled in drivers/base/sys.c.
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| 10 | *
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| 11 | * Nodes are exported via driverfs in the class/node/devices/
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| 12 | * directory.
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| 13 |
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| 14 | #ifndef _LINUX_NODE_H_
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| 15 | #define _LINUX_NODE_H_
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| 16 |
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| 17 | #include <linux/device.h>
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| 18 | #include <linux/cpumask.h>
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| 19 | #include <linux/workqueue.h>
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| 20 |
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| 21 | struct node {
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| 22 | struct device dev;
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| 23 |
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| 24 | #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
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| 25 | struct work_struct node_work;
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| 26 | #endif
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| 27 | };
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| 28 |
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| 29 | struct memory_block;
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| 30 | extern struct node node_devices[];
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| 31 | typedef void (*node_registration_func_t)(struct node *);
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| 32 |
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| 33 | extern int register_node(struct node *, int, struct node *);
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| 34 | extern void unregister_node(struct node *node);
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| 35 | #ifdef CONFIG_NUMA
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| 36 | extern int register_one_node(int nid);
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| 37 | extern void unregister_one_node(int nid);
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| 38 | extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
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| 39 | extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
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| 40 | extern int register_mem_sect_under_node(struct memory_block *mem_blk,
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| 41 | int nid);
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| 42 | extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
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| 43 | unsigned long phys_index);
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| 44 |
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| 45 | #ifdef CONFIG_HUGETLBFS
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| 46 | extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
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| 47 | node_registration_func_t unregister);
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| 48 | #endif
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| 49 | #else
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| 50 | static inline int register_one_node(int nid)
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| 51 | {
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| 52 | return 0;
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| 53 | }
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| 54 | static inline int unregister_one_node(int nid)
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| 55 | {
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| 56 | return 0;
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| 57 | }
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| 58 | static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
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| 59 | {
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| 60 | return 0;
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| 61 | }
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| 62 | static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
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| 63 | {
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| 64 | return 0;
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| 65 | }
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| 66 | static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
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| 67 | int nid)
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| 68 | {
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| 69 | return 0;
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| 70 | }
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| 71 | static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
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| 72 | unsigned long phys_index)
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| 73 | {
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| 74 | return 0;
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| 75 | }
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| 76 |
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| 77 | static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
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| 78 | node_registration_func_t unreg)
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| 79 | {
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| 80 | }
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| 81 | #endif
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| 82 |
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| 83 | #define to_node(device) container_of(device, struct node, dev)
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| 84 |
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| 85 | #endif
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