#ifndef __X8664_UNALIGNED_H
  #define __X8664_UNALIGNED_H
  
  /*
   * The x86-64 can do unaligned accesses itself. 
   *
   * The strange macros are there to make sure these can't
   * be misused in a way that makes them not work on other
   * architectures where unaligned accesses aren't as simple.
   */
  
  /**
   * get_unaligned - get value from possibly mis-aligned location
   * @ptr: pointer to value
   *
   * This macro should be used for accessing values larger in size than 
   * single bytes at locations that are expected to be improperly aligned, 
   * e.g. retrieving a u16 value from a location not u16-aligned.
   *
   * Note that unaligned accesses can be very expensive on some architectures.
   */
  #define get_unaligned(ptr) (*(ptr))
  
  /**
   * put_unaligned - put value to a possibly mis-aligned location
   * @val: value to place
   * @ptr: pointer to location
   *
   * This macro should be used for placing values larger in size than 
   * single bytes at locations that are expected to be improperly aligned, 
   * e.g. writing a u16 value to a location not u16-aligned.
   *
   * Note that unaligned accesses can be very expensive on some architectures.
   */
  #define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
  
  #endif