commit 9c2606b77d6bffb422928bca66c8dc84d85089be
author Xishi Qiu <qiuxishi@huawei.com> Tue Nov 12 15:07:21 2013 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> Wed Nov 13 12:09:04 2013 +0900
tree ce40c1b6ac3b167b7d803d142ec1ee73bfd78a11
parent d6de9d5349db61e134ab7fb6b2436a4c7938714c

mm/memory_hotplug.c: use pfn_to_nid() instead of page_to_nid(pfn_to_page())

Use "pfn_to_nid(pfn)" instead of "page_to_nid(pfn_to_page(pfn))".

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 133a4e1..5118028 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -934,7 +934,7 @@
 	arg.nr_pages = nr_pages;
 	node_states_check_changes_online(nr_pages, zone, &arg);
 
-	nid = page_to_nid(pfn_to_page(pfn));
+	nid = pfn_to_nid(pfn);
 
 	ret = memory_notify(MEM_GOING_ONLINE, &arg);
 	ret = notifier_to_errno(ret);