f2fs: don't invalidate atomic page if successful

If we committed atomic write successfully, we don't need to invalidate pages.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 299c784..770cdc9 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -223,9 +223,10 @@
 			f2fs_put_dnode(&dn);
 		}
 next:
-		ClearPageUptodate(page);
+		/* we don't need to invalidate this in the sccessful status */
+		if (drop || recover)
+			ClearPageUptodate(page);
 		set_page_private(page, 0);
-		ClearPageUptodate(page);
 		f2fs_put_page(page, 1);
 
 		list_del(&cur->list);