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authorPekka Enberg <penberg@kernel.org>2011-01-15 13:28:17 +0200
committerPekka Enberg <penberg@kernel.org>2011-01-15 13:28:17 +0200
commit597fb188cbee2d371246e1669bbc6051bb666aa9 (patch)
treefd9cb605050ca15274cf391dc6bd4073d04808df /include/linux/memory_hotplug.h
parent38567333a6dabd0f2b4150e9fb6dd8e3ba2985e5 (diff)
parent04d94879c8a4973b5499dc26b9d38acee8928791 (diff)
Merge branch 'slub/hotplug' into slab/urgent
Diffstat (limited to 'include/linux/memory_hotplug.h')
-rw-r--r--include/linux/memory_hotplug.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 24376fe7ee6..8122018d300 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -165,6 +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);