mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 07:34:06 +08:00
4091fb95b5
Fix typos and add the following to the scripts/spelling.txt: followings||following While we are here, add a missing colon in the boilerplate in DT binding documents. The "you SoC" in allwinner,sunxi-pinctrl.txt was fixed as well. I reworded "as the followings:" to "as follows:" for drivers/usb/gadget/udc/renesas_usb3.c. Link: http://lkml.kernel.org/r/1481573103-11329-32-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
#ifndef __LINUX_KCONFIG_H
|
|
#define __LINUX_KCONFIG_H
|
|
|
|
#include <generated/autoconf.h>
|
|
|
|
#define __ARG_PLACEHOLDER_1 0,
|
|
#define __take_second_arg(__ignored, val, ...) val
|
|
|
|
/*
|
|
* The use of "&&" / "||" is limited in certain expressions.
|
|
* The following enable to calculate "and" / "or" with macro expansion only.
|
|
*/
|
|
#define __and(x, y) ___and(x, y)
|
|
#define ___and(x, y) ____and(__ARG_PLACEHOLDER_##x, y)
|
|
#define ____and(arg1_or_junk, y) __take_second_arg(arg1_or_junk y, 0)
|
|
|
|
#define __or(x, y) ___or(x, y)
|
|
#define ___or(x, y) ____or(__ARG_PLACEHOLDER_##x, y)
|
|
#define ____or(arg1_or_junk, y) __take_second_arg(arg1_or_junk 1, y)
|
|
|
|
/*
|
|
* Helper macros to use CONFIG_ options in C/CPP expressions. Note that
|
|
* these only work with boolean and tristate options.
|
|
*/
|
|
|
|
/*
|
|
* Getting something that works in C and CPP for an arg that may or may
|
|
* not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1"
|
|
* we match on the placeholder define, insert the "0," for arg1 and generate
|
|
* the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one).
|
|
* When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when
|
|
* the last step cherry picks the 2nd arg, we get a zero.
|
|
*/
|
|
#define __is_defined(x) ___is_defined(x)
|
|
#define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val)
|
|
#define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0)
|
|
|
|
/*
|
|
* 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) __is_defined(option)
|
|
|
|
/*
|
|
* IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
|
|
* otherwise.
|
|
*/
|
|
#define IS_MODULE(option) __is_defined(option##_MODULE)
|
|
|
|
/*
|
|
* IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
|
|
* code can call a function defined in code compiled based on CONFIG_FOO.
|
|
* This is similar to IS_ENABLED(), but returns false when invoked from
|
|
* built-in code when CONFIG_FOO is set to 'm'.
|
|
*/
|
|
#define IS_REACHABLE(option) __or(IS_BUILTIN(option), \
|
|
__and(IS_MODULE(option), __is_defined(MODULE)))
|
|
|
|
/*
|
|
* IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
|
|
* 0 otherwise.
|
|
*/
|
|
#define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
|
|
|
|
#endif /* __LINUX_KCONFIG_H */
|