linux-kernel - Re: [tip:x86/asmlinkage] lto: Make asmlinkage _

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Date:	Fri, 14 Feb 2014 10:10:24 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	mingo@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org,
	ak@...ux.intel.com, tglx@...utronix.de, hpa@...ux.intel.com
Cc:	linux-tip-commits@...r.kernel.org,
	Tim Chen <tim.c.chen@...ux.intel.com>
Subject: Re: [tip:x86/asmlinkage] lto: Make asmlinkage __visible

On Thu, Feb 13, 2014 at 08:30:37PM -0800, tip-bot for Andi Kleen wrote:
> Commit-ID:  128ea04a9885af9629059e631ddf0cab4815b589
> Gitweb:     http://git.kernel.org/tip/128ea04a9885af9629059e631ddf0cab4815b589
> Author:     Andi Kleen <ak@...ux.intel.com>
> AuthorDate: Sat, 8 Feb 2014 09:01:07 +0100
> Committer:  H. Peter Anvin <hpa@...ux.intel.com>
> CommitDate: Thu, 13 Feb 2014 20:21:59 -0800
> 
> lto: Make asmlinkage __visible
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> Link: http://lkml.kernel.org/r/1391846481-31491-3-git-send-email-ak@linux.intel.com
> Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
> ---
>  include/linux/linkage.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/linkage.h b/include/linux/linkage.h
> index a6a42dd..34a513a 100644
> --- a/include/linux/linkage.h
> +++ b/include/linux/linkage.h
> @@ -12,9 +12,9 @@
>  #endif
>  
>  #ifdef __cplusplus
> -#define CPP_ASMLINKAGE extern "C"
> +#define CPP_ASMLINKAGE extern "C" __visible
>  #else
> -#define CPP_ASMLINKAGE
> +#define CPP_ASMLINKAGE __visible
>  #endif
>  
>  #ifndef asmlinkage
> --

arch/x86/crypto/sha256_ssse3_glue.c:56:1: warning: ‘externally_visible’ attribute have effect only on public objects [-Wattributes]
 static asmlinkage void (*sha256_transform_asm)(const char *, u32 *, u64);
 ^
arch/x86/crypto/sha512_ssse3_glue.c:55:1: warning: ‘externally_visible’ attribute have effect only on public objects [-Wattributes]
 static asmlinkage void (*sha512_transform_asm)(const char *, u64 *, u64);


I guess it is trying to tell me that static function pointers cannot be
__visible:

static asmlinkage void (*sha256_transform_asm)(const char *, u32 *, u64);

and

static asmlinkage void (*sha512_transform_asm)(const char *, u64 *, u64);

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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