[RFC} memory unplug patchset prep [15/16] hot-unplug interface for ia64

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

Call offline pages from remove_memory().

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
---
 arch/ia64/mm/init.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

Index: devel-tree-2.6.20-mm2/arch/ia64/mm/init.c
===================================================================
--- devel-tree-2.6.20-mm2.orig/arch/ia64/mm/init.c
+++ devel-tree-2.6.20-mm2/arch/ia64/mm/init.c
@@ -759,7 +759,18 @@ int arch_add_memory(int nid, u64 start, 
 
 int remove_memory(u64 start, u64 size)
 {
-	return -EINVAL;
+	unsigned long start_pfn, end_pfn;
+	unsigned long timeout = 120 * HZ;
+	int ret;
+	start_pfn = start >> PAGE_SHIFT;
+	end_pfn = start_pfn + (size >> PAGE_SHIFT);
+	ret = offline_pages(start_pfn, end_pfn, timeout);
+	if (ret)
+		goto out;
+	/* we can free mem_map at this point */
+out:
+	return ret;
 }
+
 EXPORT_SYMBOL_GPL(remove_memory);
 #endif

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