f2fs: increase pages_skipped when skipping writepages

This patch increases pages_skipped when skipping writepages.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index a5152c1..4e0e7ba 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -877,7 +877,7 @@
 
 	if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE &&
 			get_dirty_dents(inode) < nr_pages_to_skip(sbi, DATA))
-		return 0;
+		goto skip_write;
 
 	if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) {
 		desired_nrtw = MAX_DESIRED_PAGES_WP;
@@ -899,6 +899,10 @@
 
 	wbc->nr_to_write -= excess_nrtw;
 	return ret;
+
+skip_write:
+	wbc->pages_skipped += get_dirty_dents(inode);
+	return 0;
 }
 
 static int f2fs_write_begin(struct file *file, struct address_space *mapping,