diff options
| author | Michal Marek <mmarek@suse.cz> | 2011-07-20 17:38:57 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2011-07-29 21:53:30 +0200 |
| commit | 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99 (patch) | |
| tree | 975a44ccb84f5fb182fa1d6d58025b0cde381965 /include | |
| parent | bac6aa865b3dc98e9fbc17f11d4d513d6b0bc435 (diff) | |
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 <lacombar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kconfig.h | 32 |
1 files changed, 32 insertions, 0 deletions
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 <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 */ |