#ifndef _ASM_GENERIC_SWAB_H
  #define _ASM_GENERIC_SWAB_H
  
  #include <asm/bitsperlong.h>
  
  /*
   * 32 bit architectures typically (but not always) want to
   * set __SWAB_64_THRU_32__. In user space, this is only
   * valid if the compiler supports 64 bit data types.
   */
  
  #if __BITS_PER_LONG == 32
  #if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__)
  #define __SWAB_64_THRU_32__
  #endif
  #endif
  
  #endif /* _ASM_GENERIC_SWAB_H */