linux-kernel - Re: linux-next: build warning after merge of the tip tree

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Date:	Mon, 24 Feb 2014 16:56:21 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>,
	Rashika Kheria <rashika.kheria@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: linux-next: build warning after merge of the tip tree

Hi all,

On Mon, 24 Feb 2014 15:17:32 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> I guess that there may be more places where "asmlinkage" is used with
> "static" - I assume that they are all incorrect?
> 
> $ git grep -l 'static.*asmlinkage'
> arch/x86/crypto/sha1_ssse3_glue.c
> arch/x86/crypto/sha256_ssse3_glue.c
> arch/x86/crypto/sha512_ssse3_glue.c

In fact, my x86_64 allmodconfig build produces these:

arch/x86/crypto/sha1_ssse3_glue.c:43:1: warning: 'externally_visible' attribute have effect only on public objects [-Wattributes]
 static asmlinkage void (*sha1_transform_asm)(u32 *, const char *, unsigned int);
 ^
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);
 ^
mm/process_vm_access.c:422:1: warning: 'externally_visible' attribute have effect only on public objects [-Wattributes]
 {
 ^

That last is added by commit 700d00f85598 ("mm/process_vm_access.c: mark
function as static") from the akpm-current tree.

So is "static asmlinkage" not allowed?
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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