[patch] mm: export cancel_dirty_page()

[Ingo Molnar <mingo@elte.hu>]

From: Ingo Molnar <mingo@elte.hu>
Subject: [patch] export cancel_dirty_page()

export cancel_dirty_page() - it's used by hugetlbfs which can be 
modular. (This makes my -git based kernel yum repository build again.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

Index: linux/mm/truncate.c
===================================================================
--- linux.orig/mm/truncate.c
+++ linux/mm/truncate.c
@@ -65,6 +65,7 @@ void cancel_dirty_page(struct page *page
 		task_io_account_cancelled_write(account_size);
 	}
 }
+EXPORT_SYMBOL(cancel_dirty_page);
 
 /*
  * If truncate cannot remove the fs-private metadata from the page, the page