Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
---

 memhotplug-dave/mm/memory_hotplug.c |   34 ++++++++++++++++++++++++++++++++++
 1 files changed, 34 insertions(+)

diff -puN mm/memory_hotplug.c~P0-sysfs-remove-pages mm/memory_hotplug.c
--- memhotplug/mm/memory_hotplug.c~P0-sysfs-remove-pages	2005-07-28 13:51:17.000000000 -0700
+++ memhotplug-dave/mm/memory_hotplug.c	2005-07-28 13:51:17.000000000 -0700
@@ -161,3 +161,37 @@ int online_pages(unsigned long pfn, unsi
 
 	return 0;
 }
+
+int __remove_pages(struct zone *zone, unsigned long start_pfn,
+		unsigned long nr_pages)
+{
+	int order = get_order(nr_pages<<PAGE_SHIFT);
+	struct mem_section *ms = __pfn_to_section(start_pfn);
+	/*
+	 * for now, only handle 2^x sized areas
+	 */
+	if (nr_pages != 1<<order)
+		return -EINVAL;
+
+#ifdef CONFIG_MEMORY_REMOVE
+	if (capture_page_range(start_pfn, order)) {
+		printk(KERN_WARNING "%s(): failed to capture page range: %ld -> %ld\n",
+				__func__, start_pfn, start_pfn + nr_pages);
+
+		return -EAGAIN;
+	}
+#else
+	return -EINVAL;
+#endif
+
+	unregister_memory_section(ms);
+
+//	invalidate_phys_mapping(start_pfn, nr_pages);
+	{
+		unsigned long flags;
+		pgdat_resize_lock(zone->zone_pgdat, &flags);
+		ms->section_mem_map &= ~SECTION_MARKED_PRESENT;
+		pgdat_resize_unlock(zone->zone_pgdat, &flags);
+	}
+	return 0;
+}
_