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| author | James Morris <jmorris@namei.org> | 2011-03-08 02:55:06 +0300 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-03-08 02:55:06 +0300 |
| commit | 1cc26bada9f6807814806db2f0d78792eecdac71 (patch) | |
| tree | 5509b5139db04af6c13db0a580c84116a4a54039 /include/linux/memory_hotplug.h | |
| parent | eae61f3c829439f8f9121b5cd48a14be04df451f (diff) | |
| parent | 214d93b02c4fe93638ad268613c9702a81ed9192 (diff) | |
| download | linux-1cc26bada9f6807814806db2f0d78792eecdac71.tar.xz | |
Merge branch 'master'; commit 'v2.6.38-rc7' into next
Diffstat (limited to 'include/linux/memory_hotplug.h')
| -rw-r--r-- | include/linux/memory_hotplug.h | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 31c237a00c48..8122018d3000 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -13,12 +13,16 @@ struct mem_section; #ifdef CONFIG_MEMORY_HOTPLUG /* - * Types for free bootmem. - * The normal smallest mapcount is -1. Here is smaller value than it. + * Types for free bootmem stored in page->lru.next. These have to be in + * some random range in unsigned long space for debugging purposes. */ -#define SECTION_INFO (-1 - 1) -#define MIX_SECTION_INFO (-1 - 2) -#define NODE_INFO (-1 - 3) +enum { + MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12, + SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE, + MIX_SECTION_INFO, + NODE_INFO, + MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO, +}; /* * pgdat resizing functions @@ -161,6 +165,12 @@ extern void register_page_bootmem_info_node(struct pglist_data *pgdat); extern void put_page_bootmem(struct page *page); #endif +/* + * Lock for memory hotplug guarantees 1) all callbacks for memory hotplug + * notifier will be called under this. 2) offline/online/add/remove memory + * will not run simultaneously. + */ + void lock_memory_hotplug(void); void unlock_memory_hotplug(void); |