diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memory_hotplug.h | 27 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 1 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index aca9c65f8d0..73e358612ea 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -11,6 +11,15 @@ struct pglist_data; struct mem_section; #ifdef CONFIG_MEMORY_HOTPLUG + +/* + * Magic number for free bootmem. + * The normal smallest mapcount is -1. Here is smaller value than it. + */ +#define SECTION_INFO 0xfffffffe +#define MIX_INFO 0xfffffffd +#define NODE_INFO 0xfffffffc + /* * pgdat resizing functions */ @@ -145,6 +154,18 @@ static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) #endif /* CONFIG_NUMA */ #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ +#ifdef CONFIG_SPARSEMEM_VMEMMAP +static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) +{ +} +static inline void put_page_bootmem(struct page *page) +{ +} +#else +extern void register_page_bootmem_info_node(struct pglist_data *pgdat); +extern void put_page_bootmem(struct page *page); +#endif + #else /* ! CONFIG_MEMORY_HOTPLUG */ /* * Stub functions for when hotplug is off @@ -172,6 +193,10 @@ static inline int mhp_notimplemented(const char *func) return -ENOSYS; } +static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) +{ +} + #endif /* ! CONFIG_MEMORY_HOTPLUG */ extern int add_memory(int nid, u64 start, u64 size); @@ -180,5 +205,7 @@ extern int remove_memory(u64 start, u64 size); extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn, int nr_pages); extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms); +extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, + unsigned long pnum); #endif /* __LINUX_MEMORY_HOTPLUG_H */ diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index c3828497f41..aad98003176 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -896,6 +896,7 @@ static inline struct mem_section *__nr_to_section(unsigned long nr) return &mem_section[SECTION_NR_TO_ROOT(nr)][nr & SECTION_ROOT_MASK]; } extern int __section_nr(struct mem_section* ms); +extern unsigned long usemap_size(void); /* * We use the lower bits of the mem_map pointer to store |