#ifndef __LINUX_KCONFIG_H
  #define __LINUX_KCONFIG_H
  
  #include <generated/autoconf.h>
  
  /*
   * Helper macros to use CONFIG_ options in C expressions. Note that
   * these only work with boolean and tristate options.
   */
  
  /*
   * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
   * 0 otherwise.
   *
   */
  #define IS_ENABLED(option) \
  	(__enabled_ ## option || __enabled_ ## option ## _MODULE)
  
  /*
   * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
   * otherwise. For boolean options, this is equivalent to
   * IS_ENABLED(CONFIG_FOO).
   */
  #define IS_BUILTIN(option) __enabled_ ## option
  
  /*
   * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
   * otherwise.
   */
  #define IS_MODULE(option) __enabled_ ## option ## _MODULE
  
  #endif /* __LINUX_KCONFIG_H */