linux-kernel - Re: [PATCH v2] powerpc/powernv/pci: fix header guard

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Date:   Tue, 18 May 2021 13:41:49 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     Oliver O'Halloran <oohall@...il.com>,
        Joe Perches <joe@...ches.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] powerpc/powernv/pci: fix header guard

On 5/18/2021 1:40 PM, Nick Desaulniers wrote:
> While looking at -Wundef warnings, the #if CONFIG_EEH stood out as a
> possible candidate to convert to #ifdef CONFIG_EEH.
> 
> It seems that based on Kconfig dependencies it's not possible to build
> this file without CONFIG_EEH enabled, but based on upstream discussion,
> it's not clear yet that CONFIG_EEH should be enabled by default.
> 
> For now, simply fix the -Wundef warning.
> 
> Suggested-by: Nathan Chancellor <nathan@...nel.org>
> Suggested-by: Joe Perches <joe@...ches.com>
> Link: https://github.com/ClangBuiltLinux/linux/issues/570
> Link: https://lore.kernel.org/lkml/67f6cd269684c9aa8463ff4812c3b4605e6739c3.camel@perches.com/
> Link: https://lore.kernel.org/lkml/CAOSf1CGoN5R0LUrU=Y=UWho1Z_9SLgCX8s3SbFJXwJXc5BYz4A@mail.gmail.com/
> Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>

Makes sense, thanks for the patch!

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
>   arch/powerpc/platforms/powernv/pci.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
> index b18468dc31ff..6bb3c52633fb 100644
> --- a/arch/powerpc/platforms/powernv/pci.c
> +++ b/arch/powerpc/platforms/powernv/pci.c
> @@ -711,7 +711,7 @@ int pnv_pci_cfg_write(struct pci_dn *pdn,
>   	return PCIBIOS_SUCCESSFUL;
>   }
>   
> -#if CONFIG_EEH
> +#ifdef CONFIG_EEH
>   static bool pnv_pci_cfg_check(struct pci_dn *pdn)
>   {
>   	struct eeh_dev *edev = NULL;
>