#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#endif
#define set_mb(var, value) \
do { var = value; mb(); } while (0)
#endif
#define set_mb(var, value) \
do { var = value; mb(); } while (0)