linux-kernel - Re: [PATCH] kconfig.h: remove config

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Message-ID: <CAK7LNAQwhw9z0cuPyHVkwRYpyMFmmvVxZebkRnTrTi3dSxzJ0A@mail.gmail.com>
Date:   Mon, 17 Oct 2016 11:10:08 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     "H. Peter Anvin" <hpa@...or.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        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 ML <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Garnier <thgarnie@...gle.com>
Subject: Re: [PATCH] kconfig.h: remove config_enabled() macro

Hi Peter.


2016-10-17 3:44 GMT+09:00  <hpa@...or.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