linux-kernel - Re: [PATCH] crypto: camellia: add missing declarations

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Date:   Mon, 23 Jan 2017 22:02:37 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Nicholas Mc Guire <hofrat@...dl.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: camellia: add missing declarations

On Mon, Jan 16, 2017 at 05:06:51PM +0100, Nicholas Mc Guire wrote:
> Add declarations for the camellia substitution box to allow a clean build.
> 
> Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
> ---
> Problem reported by sparse
> arch/x86/crypto/camellia_glue.c:65:21: warning: symbol 'camellia_sp10011110' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:154:21: warning: symbol 'camellia_sp22000222' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:243:21: warning: symbol 'camellia_sp03303033' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:332:21: warning: symbol 'camellia_sp00444404' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:421:21: warning: symbol 'camellia_sp02220222' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:510:21: warning: symbol 'camellia_sp30333033' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:599:21: warning: symbol 'camellia_sp44044404' was not declared. Should it be static?
> arch/x86/crypto/camellia_glue.c:688:21: warning: symbol 'camellia_sp11101110' was not declared. Should it be static?
> 
> Patch was compile tested with: x86_64_defconfig +
> CONFIG_CRYPTO_CAMELLIA_X86_64=m
> 
> Patch is against 4.10-rc3 (localversion-next is next-20170116)

This is arguably a sparse bug.  These variables are only referenced
by assembly code and already carries the __visible tag.  So sparse
should learn to suppress this warning when __visible is present.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt