Module utils

Kernel independent utils like link list or bit map.

Modules

• array_based_list
  Safe linked list managed by arrays.
• bitmap
  Provide a bitmap and related opeartions.
• bitops
  Bit operations.
• io
  Just read/write from the device address.
• linked_list
  Link List implemented with Rust, which is similar to the kernel queue of the mos / Linux
• sync_ref_cell
  RefCell wrapper. It implements Sync for global use.