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- #ifndef __LINUX_MEMORY_HOTPLUG_H
- #define __LINUX_MEMORY_HOTPLUG_H
- #include <linux/mmzone.h>
- #include <linux/spinlock.h>
- #include <linux/mmzone.h>
- #include <linux/notifier.h>
- #ifdef CONFIG_MEMORY_HOTPLUG
- /*
- * pgdat resizing functions
- */
- static inline
- void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags)
- {
- spin_lock_irqsave(&pgdat->node_size_lock, *flags);
- }
- static inline
- void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags)
- {
- spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
- }
- static inline
- void pgdat_resize_init(struct pglist_data *pgdat)
- {
- spin_lock_init(&pgdat->node_size_lock);
- }
- /*
- * Zone resizing functions
- */
- static inline unsigned zone_span_seqbegin(struct zone *zone)
- {
- return read_seqbegin(&zone->span_seqlock);
- }
- static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
- {
- return read_seqretry(&zone->span_seqlock, iv);
- }
- static inline void zone_span_writelock(struct zone *zone)
- {
- write_seqlock(&zone->span_seqlock);
- }
- static inline void zone_span_writeunlock(struct zone *zone)
- {
- write_sequnlock(&zone->span_seqlock);
- }
- static inline void zone_seqlock_init(struct zone *zone)
- {
- seqlock_init(&zone->span_seqlock);
- }
- extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
- extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
- extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
- /* need some defines for these for archs that don't support it */
- extern void online_page(struct page *page);
- /* VM interface that may be used by firmware interface */
- extern int add_memory(u64 start, u64 size);
- extern int remove_memory(u64 start, u64 size);
- extern int online_pages(unsigned long, unsigned long);
- /* reasonably generic interface to expand the physical pages in a zone */
- extern int __add_pages(struct zone *zone, unsigned long start_pfn,
- unsigned long nr_pages);
- #else /* ! CONFIG_MEMORY_HOTPLUG */
- /*
- * Stub functions for when hotplug is off
- */
- static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {}
- static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {}
- static inline void pgdat_resize_init(struct pglist_data *pgdat) {}
- static inline unsigned zone_span_seqbegin(struct zone *zone)
- {
- return 0;
- }
- static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
- {
- return 0;
- }
- static inline void zone_span_writelock(struct zone *zone) {}
- static inline void zone_span_writeunlock(struct zone *zone) {}
- static inline void zone_seqlock_init(struct zone *zone) {}
- static inline int mhp_notimplemented(const char *func)
- {
- printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func);
- dump_stack();
- return -ENOSYS;
- }
- static inline int __add_pages(struct zone *zone, unsigned long start_pfn,
- unsigned long nr_pages)
- {
- return mhp_notimplemented(__FUNCTION__);
- }
- #endif /* ! CONFIG_MEMORY_HOTPLUG */
- static inline int __remove_pages(struct zone *zone, unsigned long start_pfn,
- unsigned long nr_pages)
- {
- printk(KERN_WARNING "%s() called, not yet supported\n", __FUNCTION__);
- dump_stack();
- return -ENOSYS;
- }
- #endif /* __LINUX_MEMORY_HOTPLUG_H */
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