the codes in linux-2.6.16/include/linux/stddef.h is:
#undef offsetof #ifdef __compiler_offsetof #define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER) #else #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) #endif#define DNAME_INLINE_LEN (sizeof(struct dentry)-offsetof(struct dentry,d_iname))How to understand "((size_t) &((TYPE *)0)->MEMBER)"?
Thank you