linux-hardening - Re: [PATCH v2] Compiler Attributes: Introduce __access

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Message-ID: <CANiq72nb8s0odCEfCEeWDKjJ7=aj_JxO9iaR8Jmn6LB1aSGifQ@mail.gmail.com>
Date:   Sun, 25 Sep 2022 13:36:22 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Kees Cook <keescook@...omium.org>, Miguel Ojeda <ojeda@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, llvm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2] Compiler Attributes: Introduce __access_*() function attribute

On Sun, Sep 25, 2022 at 6:46 AM Nathan Chancellor <nathan@...nel.org> wrote:
>
> The GCC docs say it is 'access', instead of '__access__'. I assume it is
> probably okay so:

Yeah, attributes can be used either with or without double
underscores, see
https://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax.

In this file, we always use the underscore ones to minimize the chance
of collisions, since the idea is that the rest of the kernel uses the
shorthands provided here.

Cheers,
Miguel