#ifndef _LINUX_STDDEF_H
  #define _LINUX_STDDEF_H
  
  #include <uapi/linux/stddef.h>
  
  
  #undef NULL
  #define NULL ((void *)0)
  
  enum {
  	false	= 0,
  	true	= 1
  };
  
  #undef offsetof
  #ifdef __compiler_offsetof
  #define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
  #else
  #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  #endif
  #endif