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#define DECLARE_PER_CPU(type, val) extern type val
#define DEFINE_PER_CPU(type, val) type val
#define __get_cpu_var(var) var
#define this_cpu_ptr(var) var
#define this_cpu_read(var) var
#define this_cpu_xchg(var, val) uatomic_xchg(&var, val)
#define this_cpu_cmpxchg(var, old, new) uatomic_cmpxchg(&var, old, new)
#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
#define per_cpu(var, cpu) (*per_cpu_ptr(&(var), cpu))
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