Turn device drivers into libraries (i.e. support Kernel Extensions) about kerla HOT 1 CLOSED

// prelude
pub use crate::alloc::borrow::ToOwned;
pub use alloc::string::{String, ToString};
pub use alloc::sync::{Arc, Weak};
pub use alloc::vec;
pub use alloc::vec::Vec;

use crate::arch::{SpinLock, PAddr, VAddr, PAGE_SIZE};

use crate::{
    net::{process_packets, receive_ethernet_frame},
    result::{Errno, Error, Result}
    boot::VirtioMmioDevice,
    drivers::{
        register_ethernet_driver,
        pci::PciDevice,
        virtio::{
            transports::{virtio_mmio::VirtioMmio, virtio_pci::VirtioPci, VirtioTransport},
            virtio::VirtqUsedChain,
        },
        Driver, DriverBuilder, EthernetDriver, MacAddress,
    },
    interrupt::attach_irq,
    mm::page_allocator::{alloc_pages, AllocPageFlags},
};