ovl: ovl_parse_param_lowerdir: Add missed '\n' for pr_err

Add '\n' for pr_err in function ovl_parse_param_lowerdir(), which
ensures that error message is displayed at once.

Fixes: b36a5780 ("ovl: modify layer parameter parsing")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Link: https://lore.kernel.org/r/20240705011510.794025-4-chengzhihao1@huawei.comSigned-off-by: Christian Brauner <brauner@kernel.org>

fs/overlayfs/params.c

@@ -449,7 +449,7 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
 		return 0;
 
 	if (*name == ':') {
-		pr_err("cannot append lower layer");
+		pr_err("cannot append lower layer\n");
 		return -EINVAL;
 	}
 
@@ -493,7 +493,7 @@ static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)
 			 * there are no data layers.
 			 */
 			if (ctx->nr_data > 0) {
-				pr_err("regular lower layers cannot follow data lower layers");
+				pr_err("regular lower layers cannot follow data lower layers\n");
 				goto out_err;
 			}