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kconfig: Introduce IS_ENABLED(), IS_BUILTIN() and IS_MODULE()

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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>
This commit is contained in:
Michal Marek
2011-07-20 17:38:57 +02:00
parent bac6aa865b
commit 2a11c8ea20
3 changed files with 47 additions and 58 deletions
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32
include/linux/kconfig.h Normal file
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@@ -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 */