include/asm-alpha/barrier.h

   1 #ifndef __BARRIER_H
   2 #define __BARRIER_H
   3
   4 #define mb() \
   5 __asm__ __volatile__("mb": : :"memory")
   6
   7 #define rmb() \
   8 __asm__ __volatile__("mb": : :"memory")
   9
  10 #define wmb() \
  11 __asm__ __volatile__("wmb": : :"memory")
  12
  13 #define read_barrier_depends() \
  14 __asm__ __volatile__("mb": : :"memory")
  15
  16 #ifdef CONFIG_SMP
  17 #define smp_mb()        mb()
  18 #define smp_rmb()       rmb()
  19 #define smp_wmb()       wmb()
  20 #define smp_read_barrier_depends()      read_barrier_depends()
  21 #else
  22 #define smp_mb()        barrier()
  23 #define smp_rmb()       barrier()
  24 #define smp_wmb()       barrier()
  25 #define smp_read_barrier_depends()      barrier()
  26 #endif
  27
  28 #define set_mb(var, value) \
  29 do { var = value; mb(); } while (0)
  30
  31 #define set_wmb(var, value) \
  32 do { var = value; wmb(); } while (0)
  33
  34 #endif          /* __BARRIER_H */