#ifndef _LINUX_STDDEF_H #define _LINUX_STDDEF_H #include <linux/compiler.h> #undef NULL #if defined(__cplusplus) #define NULL 0 #else #define NULL ((void *)0) #endif #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