Hi ~List, Could anybody explain the macro below? what does it mean? Thanks in advance. #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); })) -- Yours sincerely ZhangMeng _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies