[PATCH] mm: vmscan: fix typo in isolating lru pages

[Hillf Danton <dhillf@gmail.com>]

It is not the tag page but the cursor page that we should process, and it looks
a typo.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
---

--- a/mm/vmscan.c	Thu Dec 29 20:20:16 2011
+++ b/mm/vmscan.c	Thu Dec 29 20:23:30 2011
@@ -1231,13 +1231,13 @@ static unsigned long isolate_lru_pages(u

 				mem_cgroup_lru_del(cursor_page);
 				list_move(&cursor_page->lru, dst);
-				isolated_pages = hpage_nr_pages(page);
+				isolated_pages = hpage_nr_pages(cursor_page);
 				nr_taken += isolated_pages;
 				nr_lumpy_taken += isolated_pages;
 				if (PageDirty(cursor_page))
 					nr_lumpy_dirty += isolated_pages;
 				scan++;
-				pfn += isolated_pages-1;
+				pfn += isolated_pages - 1;
 			} else {
 				/*
 				 * Check if the page is freed already.

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