____is_defined     43 include/linux/kconfig.h #define ____is_defined(arg1_or_junk)	__take_second_arg(arg1_or_junk 1, 0)
____is_defined     25 tools/include/tools/config.h #define ____is_defined(arg1_or_junk)	__take_second_arg(arg1_or_junk 1, 0)