--- linux/mm/filemap.c.orig	Fri Nov  2 21:28:22 2001
+++ linux/mm/filemap.c	Fri Nov  2 21:28:48 2001
@@ -785,6 +785,7 @@
 	if (waitqueue_active(&(page)->wait))
 	wake_up(&(page)->wait);
 }
+EXPORT_SYMBOL(unlock_page);
 
 /*
  * Get a lock on the page, assuming we need to sleep