1 #ifndef __LINUX_MEMORY_HOTPLUG_H
2 #define __LINUX_MEMORY_HOTPLUG_H
4 #include <linux/mmzone.h>
5 #include <linux/spinlock.h>
6 #include <linux/mmzone.h>
7 #include <linux/notifier.h>
13 #ifdef CONFIG_MEMORY_HOTPLUG
15 * pgdat resizing functions
18 void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags)
20 spin_lock_irqsave(&pgdat->node_size_lock, *flags);
23 void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags)
25 spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
28 void pgdat_resize_init(struct pglist_data *pgdat)
30 spin_lock_init(&pgdat->node_size_lock);
33 * Zone resizing functions
35 static inline unsigned zone_span_seqbegin(struct zone *zone)
37 return read_seqbegin(&zone->span_seqlock);
39 static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
41 return read_seqretry(&zone->span_seqlock, iv);
43 static inline void zone_span_writelock(struct zone *zone)
45 write_seqlock(&zone->span_seqlock);
47 static inline void zone_span_writeunlock(struct zone *zone)
49 write_sequnlock(&zone->span_seqlock);
51 static inline void zone_seqlock_init(struct zone *zone)
53 seqlock_init(&zone->span_seqlock);
55 extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
56 extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
57 extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
58 /* need some defines for these for archs that don't support it */
59 extern void online_page(struct page *page);
60 /* VM interface that may be used by firmware interface */
61 extern int online_pages(unsigned long, unsigned long);
63 /* reasonably generic interface to expand the physical pages in a zone */
64 extern int __add_pages(struct zone *zone, unsigned long start_pfn,
65 unsigned long nr_pages);
68 extern int memory_add_physaddr_to_nid(u64 start);
70 static inline int memory_add_physaddr_to_nid(u64 start)
76 #else /* ! CONFIG_MEMORY_HOTPLUG */
78 * Stub functions for when hotplug is off
80 static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {}
81 static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {}
82 static inline void pgdat_resize_init(struct pglist_data *pgdat) {}
84 static inline unsigned zone_span_seqbegin(struct zone *zone)
88 static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
92 static inline void zone_span_writelock(struct zone *zone) {}
93 static inline void zone_span_writeunlock(struct zone *zone) {}
94 static inline void zone_seqlock_init(struct zone *zone) {}
96 static inline int mhp_notimplemented(const char *func)
98 printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func);
103 #endif /* ! CONFIG_MEMORY_HOTPLUG */
104 static inline int __remove_pages(struct zone *zone, unsigned long start_pfn,
105 unsigned long nr_pages)
107 printk(KERN_WARNING "%s() called, not yet supported\n", __FUNCTION__);
112 extern int add_memory(int nid, u64 start, u64 size);
113 extern int arch_add_memory(int nid, u64 start, u64 size);
114 extern int remove_memory(u64 start, u64 size);
116 #endif /* __LINUX_MEMORY_HOTPLUG_H */