tools/virtio: separate headers more.

#if defined(__i386__) || defined(__x86_64__)

#define barrier() asm volatile("" ::: "memory")

#define mb() __sync_synchronize()

#define smp_mb()	mb()

# define smp_rmb()	barrier()

# define smp_wmb()	barrier()

/* Weak barriers should be used. If not - it's a bug */

# define rmb()	abort()

# define wmb()	abort()

#else

#error Please fill in barrier macros

#endif

#ifndef BUG_H

#define BUG_H

#define BUG_ON(__BUG_ON_cond) assert(!(__BUG_ON_cond))

#define BUILD_BUG_ON(x)

#define BUG() abort()

#endif /* BUG_H */

#ifndef ERR_H

#define ERR_H

#define MAX_ERRNO	4095

#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)

static inline void * __must_check ERR_PTR(long error)

{

	return (void *) error;

}

static inline long __must_check PTR_ERR(const void *ptr)

{

	return (long) ptr;

}

static inline long __must_check IS_ERR(const void *ptr)

{

	return IS_ERR_VALUE((unsigned long)ptr);

}

static inline long __must_check IS_ERR_OR_NULL(const void *ptr)

{

	return !ptr || IS_ERR_VALUE((unsigned long)ptr);

}

#endif /* ERR_H */

#define EXPORT_SYMBOL(sym)

#define EXPORT_SYMBOL_GPL(sym)

#define EXPORT_SYMBOL_GPL_FUTURE(sym)

#define EXPORT_UNUSED_SYMBOL(sym)

#define EXPORT_UNUSED_SYMBOL_GPL(sym)

#include "../../../include/linux/irqreturn.h"