io_limit
module_param_named(io_limit, at24_io_limit, uint, 0);
segment = min(bytes_left, io_limit);
u8 *bounce __free(kfree) = kmalloc(min(count, io_limit), GFP_KERNEL);
if (segment > io_limit)
segment = io_limit;
u8 *bounce __free(kfree) = kmalloc(min(count, io_limit), GFP_KERNEL);