barrier.h

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#ifndef _M68K_BARRIER_H
#define _M68K_BARRIER_H

/*
 * Force strict CPU ordering.
 * Not really required on m68k...
 */
#define nop()       do { asm volatile ("nop"); barrier(); } while (0)
#define mb()        barrier()
#define rmb()       barrier()
#define wmb()       barrier()
#define read_barrier_depends()  ((void)0)
#define set_mb(var, value)  ({ (var) = (value); wmb(); })

#define smp_mb()    barrier()
#define smp_rmb()   barrier()
#define smp_wmb()   barrier()
#define smp_read_barrier_depends()  ((void)0)

#endif /* _M68K_BARRIER_H */