From 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99 Mon Sep 17 00:00:00 2001 From: Michal Marek Date: Wed, 20 Jul 2011 17:38:57 +0200 Subject: kconfig: Introduce IS_ENABLED(), IS_BUILTIN() and IS_MODULE() Replace the config_is_*() macros with a variant that allows for grepping for usage of CONFIG_* options in the code. Usage: if (IS_ENABLED(CONFIG_NUMA)) or #if IS_ENABLED(CONFIG_NUMA) The IS_ENABLED() macro evaluates to 1 if the argument is set (to either 'y' or 'm'), IS_BUILTIN() tests if the option is 'y' and IS_MODULE() test if the option is 'm'. Only boolean and tristate options are supported. Reviewed-by: Arnaud Lacombe Acked-by: Randy Dunlap Signed-off-by: Michal Marek --- include/linux/kconfig.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 include/linux/kconfig.h (limited to 'include') diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h new file mode 100644 index 000000000000..067eda0e4b32 --- /dev/null +++ b/include/linux/kconfig.h @@ -0,0 +1,32 @@ +#ifndef __LINUX_KCONFIG_H +#define __LINUX_KCONFIG_H + +#include + +/* + * 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 */ -- cgit v1.2.3