arch/um/include/sysdep-i386/barrier.h

   1 #ifndef __SYSDEP_I386_BARRIER_H
   2 #define __SYSDEP_I386_BARRIER_H
   3
   4 /* Copied from include/asm-i386 for use by userspace.  i386 has the option
   5  * of using mfence, but I'm just using this, which works everywhere, for now.
   6  */
   7 #define mb() asm volatile("lock; addl $0,0(%esp)")
   8
   9 #endif