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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>
- struct page;
- struct zone;
- struct pglist_data;
- #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 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);
- #ifdef CONFIG_NUMA
- extern int memory_add_physaddr_to_nid(u64 start);
- #else
- static inline int memory_add_physaddr_to_nid(u64 start)
- {
- return 0;
- }
- #endif
- #ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION
- /*
- * For supporting node-hotadd, we have to allocate a new pgdat.
- *
- * If an arch has generic style NODE_DATA(),
- * node_data[nid] = kzalloc() works well. But it depends on the architecture.
- *
- * In general, generic_alloc_nodedata() is used.
- * Now, arch_free_nodedata() is just defined for error path of node_hot_add.
- *
- */
- extern pg_data_t *arch_alloc_nodedata(int nid);
- extern void arch_free_nodedata(pg_data_t *pgdat);
- extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat);
- #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
- #define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid)
- #define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat)
- #ifdef CONFIG_NUMA
- /*
- * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat.
- * XXX: kmalloc_node() can't work well to get new node's memory at this time.
- * Because, pgdat for the new node is not allocated/initialized yet itself.
- * To use new node's memory, more consideration will be necessary.
- */
- #define generic_alloc_nodedata(nid) \
- ({ \
- kzalloc(sizeof(pg_data_t), GFP_KERNEL); \
- })
- /*
- * This definition is just for error path in node hotadd.
- * For node hotremove, we have to replace this.
- */
- #define generic_free_nodedata(pgdat) kfree(pgdat)
- extern pg_data_t *node_data[];
- static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
- {
- node_data[nid] = pgdat;
- }
- #else /* !CONFIG_NUMA */
- /* never called */
- static inline pg_data_t *generic_alloc_nodedata(int nid)
- {
- BUG();
- return NULL;
- }
- static inline void generic_free_nodedata(pg_data_t *pgdat)
- {
- }
- static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
- {
- }
- #endif /* CONFIG_NUMA */
- #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
- #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;
- }
- #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;
- }
- extern int add_memory(int nid, u64 start, u64 size);
- extern int arch_add_memory(int nid, u64 start, u64 size);
- extern int remove_memory(u64 start, u64 size);
- extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
- int nr_pages);
- #endif /* __LINUX_MEMORY_HOTPLUG_H */
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