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


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#ifndef __SYSDEP_I386_BARRIER_H
#define __SYSDEP_I386_BARRIER_H

/* Copied from include/asm-i386 for use by userspace.  i386 has the option
 * of using mfence, but I'm just using this, which works everywhere, for now.
 */
#define mb() asm volatile("lock; addl $0,0(%esp)")

#endif