linux-kernel - Re: [RESEND PATCH 2/2] powerpc/powermac: constify device_node in of_irq_parse

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Date:   Wed, 22 Sep 2021 15:55:03 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [RESEND PATCH 2/2] powerpc/powermac: constify device_node in
 of_irq_parse_oldworld()



Le 22/09/2021 à 10:44, Krzysztof Kozlowski a écrit :
> The of_irq_parse_oldworld() does not modify passed device_node so make
> it a pointer to const for safety.

AFAIKS this patch is unrelated to previous one so you should send them 
out separately instead of sending as a series.

> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> ---
>   arch/powerpc/platforms/powermac/pic.c | 2 +-
>   include/linux/of_irq.h                | 4 ++--
>   2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
> index 4921bccf0376..af5ca1f41bb1 100644
> --- a/arch/powerpc/platforms/powermac/pic.c
> +++ b/arch/powerpc/platforms/powermac/pic.c
> @@ -384,7 +384,7 @@ static void __init pmac_pic_probe_oldstyle(void)
>   #endif
>   }
>   
> -int of_irq_parse_oldworld(struct device_node *device, int index,
> +int of_irq_parse_oldworld(const struct device_node *device, int index,
>   			struct of_phandle_args *out_irq)
>   {
>   	const u32 *ints = NULL;
> diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
> index aaf219bd0354..6074fdf51f0c 100644
> --- a/include/linux/of_irq.h
> +++ b/include/linux/of_irq.h
> @@ -20,12 +20,12 @@ typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
>   #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
>   extern unsigned int of_irq_workarounds;
>   extern struct device_node *of_irq_dflt_pic;
> -extern int of_irq_parse_oldworld(struct device_node *device, int index,
> +extern int of_irq_parse_oldworld(const struct device_node *device, int index,
>   			       struct of_phandle_args *out_irq);

Please remove 'extern' which is useless for prototypes.

>   #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
>   #define of_irq_workarounds (0)
>   #define of_irq_dflt_pic (NULL)
> -static inline int of_irq_parse_oldworld(struct device_node *device, int index,
> +static inline int of_irq_parse_oldworld(const struct device_node *device, int index,
>   				      struct of_phandle_args *out_irq)
>   {
>   	return -EINVAL;
>