[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: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index e3215ba..b38b6d2 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -635,3 +635,39 @@
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