Commit 1681b8e1 authored by Yasunori Goto's avatar Yasunori Goto Committed by Tony Luck
Browse files

[IA64] Simple memory hot-add for ia64. 



First step to memory hotplug for ia64 (add only,
all new memory is added to node 0, does not use
ZONE_EASY_RECLAIM yet).

Signed-off-by: default avatarYasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 4a8e4a27

arch/ia64/mm/init.c

+36 −0
Original line number Diff line number Diff line
@@ -635,3 +635,39 @@ mem_init (void) 
	ia32_mem_init();

#endif

}



#ifdef CONFIG_MEMORY_HOTPLUG

void online_page(struct page *page)

{

	ClearPageReserved(page);

	set_page_count(page, 1);

	__free_page(page);

	totalram_pages++;

	num_physpages++;

}



int add_memory(u64 start, u64 size)

{

	pg_data_t *pgdat;

	struct zone *zone;

	unsigned long start_pfn = start >> PAGE_SHIFT;

	unsigned long nr_pages = size >> PAGE_SHIFT;

	int ret;



	pgdat = NODE_DATA(0);



	zone = pgdat->node_zones + ZONE_NORMAL;

	ret = __add_pages(zone, start_pfn, nr_pages);



	if (ret)

		printk("%s: Problem encountered in __add_pages() as ret=%d\n",

		       __FUNCTION__,  ret);



	return ret;

}



int remove_memory(u64 start, u64 size)

{

	return -EINVAL;

}

#endif