#include <linux/kernel.h>
-#include <asm/atomic.h>
#include <asm/hw_irq.h>
/*
#define read_barrier_depends() do { } while(0)
#define set_mb(var, value) do { var = value; mb(); } while (0)
-#define set_wmb(var, value) do { var = value; wmb(); } while (0)
#ifdef CONFIG_SMP
#define smp_mb() mb()
extern void __xchg_called_with_bad_pointer(void);
#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
-#define tas(ptr) (xchg((ptr),1))
static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
{