LXR linux/arch/sparc/include/asm/barrier

   1#ifndef __SPARC_BARRIER_H
   2#define __SPARC_BARRIER_H
   3
   4/* XXX Change this if we ever use a PSO mode kernel. */
   5#define mb()    __asm__ __volatile__ ("" : : : "memory")
   6#define rmb()   mb()
   7#define wmb()   mb()
   8#define read_barrier_depends()  do { } while(0)
   9#define set_mb(__var, __value)  do { __var = __value; mb(); } while(0)
  10#define smp_mb()        __asm__ __volatile__("":::"memory")
  11#define smp_rmb()       __asm__ __volatile__("":::"memory")
  12#define smp_wmb()       __asm__ __volatile__("":::"memory")
  13#define smp_read_barrier_depends()      do { } while(0)
  14
  15#endif /* !(__SPARC_BARRIER_H) */
  16