- /*
- * We must always pass in a valid mount pointer. Historically
- * callers got away with not passing it, but we must enforce this at
- * the earliest possible point now to avoid strange problems deep in the
- * filesystem stack.
- */
- if (!mnt) {
- printk(KERN_WARNING "%s called with NULL vfsmount\n", __func__);
- dump_stack();
- return ERR_PTR(-EINVAL);
- }