compiler-gcc3.h

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#ifndef __LINUX_COMPILER_H
#error "Please don't include <linux/compiler-gcc3.h> directly, include <linux/compiler.h> instead."
#endif

#if __GNUC_MINOR__ < 2
# error Sorry, your compiler is too old - please upgrade it.
#endif

#if __GNUC_MINOR__ >= 3
# define __used         __attribute__((__used__))
#else
# define __used         __attribute__((__unused__))
#endif

#if __GNUC_MINOR__ >= 4
#define __must_check        __attribute__((warn_unused_result))
#endif

#ifdef CONFIG_GCOV_KERNEL
# if __GNUC_MINOR__ < 4
#   error "GCOV profiling support for gcc versions below 3.4 not included"
# endif /* __GNUC_MINOR__ */
#endif /* CONFIG_GCOV_KERNEL */