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authorBadari Pulavarty <pbadari@us.ibm.com>2008-04-28 02:12:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:17 -0700
commitea01ea937dcae2caa146dea1918cccf2f16ed3c4 (patch)
treeaa3189d587dc04f75bd6a0d79d7f5a764200cd81 /include/linux/memory_hotplug.h
parent2a4e2b8780c6df42b19c053243dada7fa4d311ee (diff)
downloadop-kernel-dev-ea01ea937dcae2caa146dea1918cccf2f16ed3c4.zip
op-kernel-dev-ea01ea937dcae2caa146dea1918cccf2f16ed3c4.tar.gz
hotplug memory remove: generic __remove_pages() support
Generic helper function to remove section mappings and sysfs entries for the section of the memory we are removing. offline_pages() correctly adjusted zone and marked the pages reserved. TODO: Yasunori Goto is working on patches to free up allocations from bootmem. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Acked-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/memory_hotplug.h')
-rw-r--r--include/linux/memory_hotplug.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 8fee7a4..aca9c65 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -8,6 +8,7 @@
struct page;
struct zone;
struct pglist_data;
+struct mem_section;
#ifdef CONFIG_MEMORY_HOTPLUG
/*
@@ -64,9 +65,11 @@ extern int offline_pages(unsigned long, 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);
+extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
+ unsigned long nr_pages);
/*
- * Walk thorugh all memory which is registered as resource.
+ * Walk through all memory which is registered as resource.
* arg is (start_pfn, nr_pages, private_arg_pointer)
*/
extern int walk_memory_resource(unsigned long start_pfn,
@@ -176,5 +179,6 @@ 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);
+extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms);
#endif /* __LINUX_MEMORY_HOTPLUG_H */
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