1#ifndef _LINUX_STDDEF_H 2#define _LINUX_STDDEF_H 3 4#undef NULL 5#if defined(__cplusplus) 6#define NULL 0 7#else 8#define NULL ((void *)0) 9#endif 10 11#ifndef _SIZE_T 12#include <linux/types.h> 13#endif 14 15#ifndef __CHECKER__ 16#undef offsetof 17#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 18#endif 19 20#endif 21