xfrm_alloc_spi
int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi,
err = xfrm_alloc_spi(x, min_spi, max_spi, NULL);
EXPORT_SYMBOL(xfrm_alloc_spi);
err = xfrm_alloc_spi(x, p->min, p->max, extack);