mm: fix warning on memory offline

[linux-2.6-omap-h63xx.git] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index 4e0eccca5e265ac19bc507a171a2f720d27f8c21..449d77d409f52622bbf825b7fd17d43df7ff5fbf 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -383,7 +383,14 @@ static void migrate_page_copy(struct page *newpage, struct page *page)
 
        if (PageDirty(page)) {
                clear_page_dirty_for_io(page);
-               set_page_dirty(newpage);
+               /*
+                * Want to mark the page and the radix tree as dirty, and
+                * redo the accounting that clear_page_dirty_for_io undid,
+                * but we can't use set_page_dirty because that function
+                * is actually a signal that all of the page has become dirty.
+                * Wheras only part of our page may be dirty.
+                */
+               __set_page_dirty_nobuffers(newpage);
        }
 
 #ifdef CONFIG_SWAP