static inline int nd_alloc_stack(struct nameidata *nd)
{
	if (likely(nd->depth != EMBEDDED_LEVELS))
		return 0;
	if (likely(nd->stack != nd->internal))
		return 0;
	return __nd_alloc_stack(nd);
}
static inline int nd_alloc_stack(struct nameidata *nd)
{
	if (likely(nd->depth != EMBEDDED_LEVELS))
		return 0;
	if (likely(nd->stack != nd->internal))
		return 0;
	return __nd_alloc_stack(nd);
}