linux-kernel - Re: [PATCH 01/34] powerpc/fsl-soc: hide unused const variable

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Date: Wed, 3 Apr 2024 08:19:00 +0000
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Arnd Bergmann <arnd@...nel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, Michael Ellerman <mpe@...erman.id.au>,
	Alexander Graf <agraf@...e.de>, Stuart Yoder <stuart.yoder@...escale.com>,
	Scott Wood <scottwood@...escale.com>
CC: Arnd Bergmann <arnd@...db.de>, Nicholas Piggin <npiggin@...il.com>, Aneesh
 Kumar K.V <aneesh.kumar@...nel.org>, "Naveen N. Rao"
	<naveen.n.rao@...ux.ibm.com>, Uwe Kleine-König
	<u.kleine-koenig@...gutronix.de>, Rob Herring <robh@...nel.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 01/34] powerpc/fsl-soc: hide unused const variable



Le 03/04/2024 à 10:06, Arnd Bergmann a écrit :
> From: Arnd Bergmann <arnd@...db.de>
> 
> vmpic_msi_feature is only used conditionally, which triggers a rare
> -Werror=unused-const-variable= warning with gcc:
> 
> arch/powerpc/sysdev/fsl_msi.c:567:37: error: 'vmpic_msi_feature' defined but not used [-Werror=unused-const-variable=]
>    567 | static const struct fsl_msi_feature vmpic_msi_feature =
> 
> Hide this one in the same #ifdef as the reference so we can turn on
> the warning by default.
> 
> Fixes: 305bcf26128e ("powerpc/fsl-soc: use CONFIG_EPAPR_PARAVIRT for hcalls")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
>   arch/powerpc/sysdev/fsl_msi.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
> index 8e6c84df4ca1..e205135ae1fe 100644
> --- a/arch/powerpc/sysdev/fsl_msi.c
> +++ b/arch/powerpc/sysdev/fsl_msi.c
> @@ -564,10 +564,12 @@ static const struct fsl_msi_feature ipic_msi_feature = {
>   	.msiir_offset = 0x38,
>   };
>   
> +#ifdef CONFIG_EPAPR_PARAVIRT
>   static const struct fsl_msi_feature vmpic_msi_feature = {
>   	.fsl_pic_ip = FSL_PIC_IP_VMPIC,
>   	.msiir_offset = 0,
>   };
> +#endif
>   
>   static const struct of_device_id fsl_of_msi_ids[] = {
>   	{