[PATCH] re-export clear_page_dirty_for_io()

2.6.14 has this exported, and reiser4 (at least) uses it.  Put things back
the way they were.

Signed-off-by: Vladimir V. Saveliev <vs@namesys.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 74138c9..0166ea15 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -750,6 +750,7 @@
 	}
 	return TestClearPageDirty(page);
 }
+EXPORT_SYMBOL(clear_page_dirty_for_io);
 
 int test_clear_page_writeback(struct page *page)
 {