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From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 17 Oct 2016 11:10:08 +0900
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Subject: Re: [PATCH] kconfig.h: remove config_enabled() macro
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-arch@vger.kernel.org,
        Peter Oberparleiter <oberpar@linux.vnet.ibm.com>,
        Arnd Bergmann <arnd@arndb.de>, Kees Cook <keescook@chromium.org>,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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Hi Peter.


2016-10-17 3:44 GMT+09:00  <hpa@zytor.com>:
>
> How is __is_defined() different from defined()?



defined() can be used only in pre-processor's #if context, like

    #if defined(FOO)
          ...
    #endif



__is_defined() can be used more flexibly.




-- 
Best Regards
Masahiro Yamada