Are their uses of unsafe necessary? After briefly looking over the implementation it seems like they could just be using references in a bunch of places. Take f

Are their uses of unsafe necessary? After briefly looking over the implementation it seems like they could just be using references in a bunch of places. Take for example: let queue = &mut self.rx_queues[queue_id as usize]; rx_index = queue.rx_index; last_rx_index = queue.rx_index; for i in 0..num_packets { let desc = unsafe { queue.descriptors.add(rx_index) as *mut ixgbe_adv_rx_desc }; let status = unsafe { ptr::read_volatile(&mut (*desc).wb.upper.status_error as *mut u32) };