#include <asm/ptrace.h>
+#define prepare_to_switch() do { } while (0)
+
/*
* switch_to(n) should switch tasks to task ptr, first checking that
* ptr isn't the current task, in which case it does nothing.
#define read_barrier_depends() ((void)0)
#define set_rmb(var, value) do { xchg (&var, value); } while (0)
#define set_mb(var, value) set_rmb (var, value)
+#define set_wmb(var, value) do { var = value; wmb (); } while (0)
#define smp_mb() mb ()
#define smp_rmb() rmb ()