mm: fix find_get_pages_contig

From: Konstantin Khlebnikov <khlebnikov@openvz.org>

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
---
 mm/filemap.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 79c4b2b..f4343a3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -928,7 +928,10 @@ repeat:
 		 * otherwise we can get both false positives and false
 		 * negatives, which is just confusing to the caller.
 		 */
-		if (page->mapping == NULL || page->index != iter.index) {
+		if (page->mapping == NULL || page->index != index + ret) {
+			if (iter.index != index + ret)
+				printk("%s %lu %lu %u\n", __func__,
+						iter.index, index, ret);
 			page_cache_release(page);
 			break;
 		}