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Subject[PATCH] kconfig.h: remove config_enabled() macro
Date
The use of config_enabled() is ambiguous.  For config options,
IS_ENABLED(), IS_REACHABLE(), etc. will make intention clearer.
Sometimes config_enabled() has been used for non-config options
because it is useful to check whether the given symbol is defined
or not.

I have been tackling on deprecating config_enabled(), and now is the
time to finish this work.

Some new users have appeared for v4.9-rc1, but it is trivial to
replace them:

- arch/x86/mm/kaslr.c
replace config_enabled() with IS_ENABLED() because
CONFIG_X86_ESPFIX64 and CONFIG_EFI are boolean.

- include/asm-generic/export.h
replace config_enabled() with __is_defined().

Then, config_enabled() can be removed now.

Going forward, please use IS_ENABLED(), IS_REACHABLE(), etc. for
config options, and __is_defined() for non-config symbols.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

arch/x86/mm/kaslr.c | 6 +++---
include/asm-generic/export.h | 2 +-
include/linux/kconfig.h | 5 ++---
3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/arch/x86/mm/kaslr.c b/arch/x86/mm/kaslr.c
index ddd2661..887e571 100644
--- a/arch/x86/mm/kaslr.c
+++ b/arch/x86/mm/kaslr.c
@@ -104,10 +104,10 @@ void __init kernel_randomize_memory(void)
* consistent with the vaddr_start/vaddr_end variables.
*/
BUILD_BUG_ON(vaddr_start >= vaddr_end);
- BUILD_BUG_ON(config_enabled(CONFIG_X86_ESPFIX64) &&
+ BUILD_BUG_ON(IS_ENABLED(CONFIG_X86_ESPFIX64) &&
vaddr_end >= EFI_VA_START);
- BUILD_BUG_ON((config_enabled(CONFIG_X86_ESPFIX64) ||
- config_enabled(CONFIG_EFI)) &&
+ BUILD_BUG_ON((IS_ENABLED(CONFIG_X86_ESPFIX64) ||
+ IS_ENABLED(CONFIG_EFI)) &&
vaddr_end >= __START_KERNEL_map);
BUILD_BUG_ON(vaddr_end > __START_KERNEL_map);

diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
index 43199a0..63554e9 100644
--- a/include/asm-generic/export.h
+++ b/include/asm-generic/export.h
@@ -70,7 +70,7 @@
#include <generated/autoksyms.h>

#define __EXPORT_SYMBOL(sym, val, sec) \
- __cond_export_sym(sym, val, sec, config_enabled(__KSYM_##sym))
+ __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym))
#define __cond_export_sym(sym, val, sec, conf) \
___cond_export_sym(sym, val, sec, conf)
#define ___cond_export_sym(sym, val, sec, enabled) \
diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h
index 15ec117..8f2e059 100644
--- a/include/linux/kconfig.h
+++ b/include/linux/kconfig.h
@@ -31,7 +31,6 @@
* 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 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)
@@ -41,13 +40,13 @@
* otherwise. For boolean options, this is equivalent to
* IS_ENABLED(CONFIG_FOO).
*/
-#define IS_BUILTIN(option) config_enabled(option)
+#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) config_enabled(option##_MODULE)
+#define IS_MODULE(option) __is_defined(option##_MODULE)

/*
* IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
--
1.9.1
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