linux-kernel - Re: [PATCH 1/1] security: Used macros from compiler.h instead of __attribute_

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Message-ID: <CAMuHMdVJ7zv0qqhZNMNXihm4Kqv9WA9yyMe3F9ptUZyDjvEnTg@mail.gmail.com>
Date:	Wed, 18 Jun 2014 22:08:13 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Paul Moore <paul@...l-moore.com>
Cc:	Gideon Israel Dsouza <gidisrael@...il.com>, sds@...ho.nsa.gov,
	Eric Paris <eparis@...isplace.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-security-module@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] security: Used macros from compiler.h instead of __attribute__((...))

On Wed, Jun 18, 2014 at 8:50 PM, Paul Moore <paul@...l-moore.com> wrote:
> On Wednesday, June 11, 2014 09:25:30 PM Gideon Israel Dsouza wrote:
>> To increase compiler portability there is <linux/compiler.h> which
>> provides convenience macros for various gcc constructs.  Eg: __packed
>> for __attribute__((packed)).
>>
>> This patch is part of a large task I've taken to clean the gcc
>> specific attributes and use the the macros instead.
>>
>> Signed-off-by: Gideon Israel Dsouza <gidisrael@...il.com>
>> ---
>>  security/selinux/include/security.h | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> From what I can tell this should still work with both the LLVM and Intel
> compilers, is that correct?

That's the idea of the compiler-agnostic attribute macros.

Interestingly, only include/linux/compiler-gcc.h defines __packed.

As it's already in heavy use, I can only assume both LLVM and the Intel
compilers handle both "__packed" (without a special definition) and the
gcc-specific "__attribute__((packed))".

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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