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Date: Sun, 16 Oct 2016 20:07:58 +0900 From: Masahiro Yamada <yamada.masahiro@...ionext.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>, linux-arch@...r.kernel.org, Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>, Arnd Bergmann <arnd@...db.de>, Kees Cook <keescook@...omium.org>, Michal Marek <mmarek@...e.com>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Thomas Garnier <thgarnie@...gle.com> Subject: [PATCH] kconfig.h: remove config_enabled() macro 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@...ionext.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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