text: #ifndef __QEMU_BARRIER_H
  #define __QEMU_BARRIER_H 1
  
  /* FIXME: arch dependant, x86 version */
  #define smp_wmb()   asm volatile("" ::: "memory")
  
  /* Compiler barrier */
  #define barrier()   asm volatile("" ::: "memory")
  
  #endif
  