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authorYasunori Goto <y-goto@jp.fujitsu.com>2006-01-07 11:50:38 +0900
committerTony Luck <tony.luck@intel.com>2006-01-16 12:06:55 -0800
commit1681b8e1588f9119899e422181f728b197b1fe34 (patch)
tree238b9eb936b34f258a6ebf10236be86eacaf84e5 /arch
parent4a8e4a270b89030bdeb09d2f8cef7cfe9a50e54d (diff)
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/mm/init.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index e3215ba64ffd..b38b6d213c15 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -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