The patch titled
Subject: kconfig.h: use __is_defined() to check if MODULE is defined
has been added to the -mm tree. Its filename is
kconfigh-use-__is_defined-to-check-if-module-is-defined.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kconfigh-use-__is_defined-to-check-if-module-is-defined.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kconfigh-use-__is_defined-to-check-if-module-is-defined.patch
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From: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Subject: kconfig.h: use __is_defined() to check if MODULE is defined
The macro MODULE is not a config option, it is a per-file build option.
So, config_enabled(MODULE) is not sensible. (There is another case in
include/linux/export.h, where config_enabled() is used against a
non-config option.)
This commit renames some macros in include/linux/kconfig.h for the use for
non-config macros and replaces config_enabled(MODULE) with
__is_defined(MODULE).
I am keeping config_enabled() because it is still referenced from some
places, but I expect it would be deprecated in the future.
Link: http://lkml.kernel.org/r/1465883938-25194-1-git-send-email-yamada.masahiro@xxxxxxxxxxxxx
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Michal Simek <michal.simek@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Cc: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kconfig.h | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff -puN include/linux/kconfig.h~kconfigh-use-__is_defined-to-check-if-module-is-defined include/linux/kconfig.h
--- a/include/linux/kconfig.h~kconfigh-use-__is_defined-to-check-if-module-is-defined
+++ a/include/linux/kconfig.h
@@ -17,10 +17,11 @@
* the last step cherry picks the 2nd arg, we get a zero.
*/
#define __ARG_PLACEHOLDER_1 0,
-#define config_enabled(cfg) _config_enabled(cfg)
-#define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value)
-#define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0)
-#define ___config_enabled(__ignored, val, ...) val
+#define config_enabled(cfg) ___is_defined(cfg)
+#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)
+#define __take_second_arg(__ignored, val, ...) val
/*
* IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
@@ -42,7 +43,7 @@
* built-in code when CONFIG_FOO is set to 'm'.
*/
#define IS_REACHABLE(option) (config_enabled(option) || \
- (config_enabled(option##_MODULE) && config_enabled(MODULE)))
+ (config_enabled(option##_MODULE) && __is_defined(MODULE)))
/*
* IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
_
Patches currently in -mm which might be from yamada.masahiro@xxxxxxxxxxxxx are
kconfigh-use-__is_defined-to-check-if-module-is-defined.patch
exporth-use-__is_defined-to-check-if-__ksym_-is-defined.patch
kconfigh-use-already-defined-macros-for-is_reachable-define.patch
kconfigh-allow-to-use-is_enablereachable-in-macro-expansion.patch
vmlinuxldsh-replace-config_enabled-with-is_enabled.patch
tree-wide-replace-config_enabled-with-is_enabled.patch
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