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#ifndef __LINUX_COMPILER_H

#define __LINUX_COMPILER_H

/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented

   a mechanism by which the user can annotate likely branch directions and

   expect the blocks to be reordered appropriately.  Define __builtin_expect

   to nothing for earlier compilers.  */

#if __GNUC__ == 2 && __GNUC_MINOR__ < 96

#define __builtin_expect(x, expected_value) (x)

#endif

#define likely(x)       __builtin_expect((x),1)

#define unlikely(x)     __builtin_expect((x),0)

#if __GNUC__ > 3

#define __attribute_used__      __attribute((__used__))

#elif __GNUC__ == 3

#if  __GNUC_MINOR__ >= 3

# define __attribute_used__     __attribute__((__used__))

#else

# define __attribute_used__     __attribute__((__unused__))

#endif /* __GNUC_MINOR__ >= 3 */

#elif __GNUC__ == 2

#define __attribute_used__      __attribute__((__unused__))

#else

#define __attribute_used__      /* not implemented */

#endif /* __GNUC__ */

#endif /* __LINUX_COMPILER_H */