arch/m68k/include/asm/barrier.h

   1 #ifndef _M68K_BARRIER_H
   2 #define _M68K_BARRIER_H
   3
   4 /*
   5  * Force strict CPU ordering.
   6  * Not really required on m68k...
   7  */
   8 #define nop()           do { asm volatile ("nop"); barrier(); } while (0)
   9 #define mb()            barrier()
  10 #define rmb()           barrier()
  11 #define wmb()           barrier()
  12 #define read_barrier_depends()  ((void)0)
  13 #define set_mb(var, value)      ({ (var) = (value); wmb(); })
  14
  15 #define smp_mb()        barrier()
  16 #define smp_rmb()       barrier()
  17 #define smp_wmb()       barrier()
  18 #define smp_read_barrier_depends()      ((void)0)
  19
  20 #endif /* _M68K_BARRIER_H */