linux-hardening - Re: [PATCH v4 06/15] ftrace: Use an opaque type for functions not callable from C

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Date:   Wed, 6 Oct 2021 10:16:54 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Sami Tolvanen <samitolvanen@...gle.com>, x86@...nel.org,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH v4 06/15] ftrace: Use an opaque type for functions not
 callable from C

On Wed, 6 Oct 2021 06:54:17 -0700
Josh Poimboeuf <jpoimboe@...hat.com> wrote:

> But this macro is used in other places as well:
> 
>   https://lkml.kernel.org/r/20210930180531.1190642-10-samitolvanen@google.com
> 
> And many of them aren't internal to a function like the above symbols,
> they're actual functions that are called in other ways.
> 
> DECLARE_UNCALLED_FROM_C() ?

  DECLARE_NOT_CALLED_FROM_C() ;-)

Straight and to the point!

"uncalled" is a strange word.

-- Steve