linux-kernel - Re: [PATCH v1 2/5] powerpc/fault: Unnest definition of page_fault_is_write() and page_fault_is

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Date:   Tue, 08 Sep 2020 18:44:45 +1000
From:   Nicholas Piggin <npiggin@...il.com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Michael Ellerman <mpe@...erman.id.au>,
        Paul Mackerras <paulus@...ba.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v1 2/5] powerpc/fault: Unnest definition of
 page_fault_is_write() and page_fault_is_bad()

Excerpts from Christophe Leroy's message of August 7, 2020 3:15 am:
> To make it more readable, separate page_fault_is_write() and page_fault_is_bad()
> to avoir several levels of #ifdefs

Reviewed-by: Nicholas Piggin <npiggin@...il.com>

> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
> ---
>  arch/powerpc/mm/fault.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
> index 2efa34d7e644..9ef9ee244f72 100644
> --- a/arch/powerpc/mm/fault.c
> +++ b/arch/powerpc/mm/fault.c
> @@ -363,17 +363,19 @@ static void sanity_check_fault(bool is_write, bool is_user,
>   */
>  #if (defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
>  #define page_fault_is_write(__err)	((__err) & ESR_DST)
> -#define page_fault_is_bad(__err)	(0)
>  #else
>  #define page_fault_is_write(__err)	((__err) & DSISR_ISSTORE)
> -#if defined(CONFIG_PPC_8xx)
> +#endif
> +
> +#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
> +#define page_fault_is_bad(__err)	(0)
> +#elif defined(CONFIG_PPC_8xx)
>  #define page_fault_is_bad(__err)	((__err) & DSISR_NOEXEC_OR_G)
>  #elif defined(CONFIG_PPC64)
>  #define page_fault_is_bad(__err)	((__err) & DSISR_BAD_FAULT_64S)
>  #else
>  #define page_fault_is_bad(__err)	((__err) & DSISR_BAD_FAULT_32S)
>  #endif
> -#endif
>  
>  /*
>   * For 600- and 800-family processors, the error_code parameter is DSISR
> -- 
> 2.25.0
> 
>