#ifndef _LINUX_STDDEF_H
  #define _LINUX_STDDEF_H
  
  #undef NULL
  #if defined(__cplusplus)
  #define NULL 0
  #else
  #define NULL ((void *)0)
  #endif
  
  #ifndef _SIZE_T
  #include <linux/types.h>
  #endif
  
  #ifndef __CHECKER__
  #undef offsetof
  #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
  #endif
  
  #endif