[PATCH] memory hotplug: ppc64 specific hot-add functions

	return vma_prot;

}

EXPORT_SYMBOL(phys_mem_access_prot);

#ifdef CONFIG_MEMORY_HOTPLUG

void online_page(struct page *page)

{

	ClearPageReserved(page);

	free_cold_page(page);

	totalram_pages++;

	num_physpages++;

}

/*

 * This works only for the non-NUMA case.  Later, we'll need a lookup

 * to convert from real physical addresses to nid, that doesn't use

 * pfn_to_nid().

 */

int __devinit add_memory(u64 start, u64 size)

{

	struct pglist_data *pgdata = NODE_DATA(0);

	struct zone *zone;

	unsigned long start_pfn = start >> PAGE_SHIFT;

	unsigned long nr_pages = size >> PAGE_SHIFT;

	/* this should work for most non-highmem platforms */

	zone = pgdata->node_zones;

	return __add_pages(zone, start_pfn, nr_pages);

	return 0;

}

/*

 * First pass at this code will check to determine if the remove

 * request is within the RMO.  Do not allow removal within the RMO.

 */

int __devinit remove_memory(u64 start, u64 size)

{

	struct zone *zone;

	unsigned long start_pfn, end_pfn, nr_pages;

	start_pfn = start >> PAGE_SHIFT;

	nr_pages = size >> PAGE_SHIFT;

	end_pfn = start_pfn + nr_pages;

	printk("%s(): Attempting to remove memoy in range "

			"%lx to %lx\n", __func__, start, start+size);

	/*

	 * check for range within RMO

	 */

	zone = page_zone(pfn_to_page(start_pfn));

	printk("%s(): memory will be removed from "

			"the %s zone\n", __func__, zone->name);

	/*

	 * not handling removing memory ranges that

	 * overlap multiple zones yet

	 */

	if (end_pfn > (zone->zone_start_pfn + zone->spanned_pages))

		goto overlap;

	/* make sure it is NOT in RMO */

	if ((start < lmb.rmo_size) || ((start+size) < lmb.rmo_size)) {

		printk("%s(): range to be removed must NOT be in RMO!\n",

			__func__);

		goto in_rmo;

	}

	return __remove_pages(zone, start_pfn, nr_pages);

overlap:

	printk("%s(): memory range to be removed overlaps "

		"multiple zones!!!\n", __func__);

in_rmo:

	return -1;

}

#endif /* CONFIG_MEMORY_HOTPLUG */