---
 mm/rmap.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: linux-2.6/mm/rmap.c
===================================================================
--- linux-2.6.orig/mm/rmap.c	2008-01-31 19:55:30.000000000 -0800
+++ linux-2.6/mm/rmap.c	2008-01-31 19:55:39.000000000 -0800
@@ -476,6 +476,10 @@ int page_mkclean(struct page *page)
 		struct address_space *mapping = page_mapping(page);
 		if (mapping) {
 			ret = page_mkclean_file(mapping, page);
+			if (unlikely(PageExternalRmap(page))) {
+				mmu_rmap_notifier(invalidate_page, page);
+				ClearPageExternalRmap(page);
+			}
 			if (page_test_dirty(page)) {
 				page_clear_dirty(page);
 				ret = 1;
@@ -978,6 +982,11 @@ int try_to_unmap(struct page *page, int 
 	else
 		ret = try_to_unmap_file(page, migration);
 
+	if (unlikely(PageExternalRmap(page))) {
+		mmu_rmap_notifier(invalidate_page, page);
+		ClearPageExternalRmap(page);
+	}
+
 	if (!page_mapped(page))
 		ret = SWAP_SUCCESS;
 	return ret;