Subject: Re: [PATCH v3 1/1] memory: Fix export symbol twice compiler error for "export symbols for memory related functions" patch

From: "Russell King (Oracle)" <[email-masked]>
Date: Wed, 14 Jun 2023 17:24:02 +0100

On Wed, Jun 14, 2023 at 11:39:02PM +0800, Wei Chin Tsai wrote:
> User could not add the export symbol "arch_vma_name"
> in arch/arm/kernel/process.c and kernel/signal.c both.
> It would cause the export symbol twice compiler error
> Reported-by: kernel test robot <[email-masked]>
> 
> Signed-off-by: Wei Chin Tsai <[email-masked]>

I'm sorry, but this patch is silly.

> diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
> index df91412a1069..d71a9bafb584 100644
> --- a/arch/arm/kernel/process.c
> +++ b/arch/arm/kernel/process.c
> @@ -343,7 +343,10 @@ const char *arch_vma_name(struct vm_area_struct *vma)
>  {
>  	return is_gate_vma(vma) ? "[vectors]" : NULL;
>  }
> +
> +#ifdef CONFIG_ARM
>  EXPORT_SYMBOL_GPL(arch_vma_name);
> +#endif

CONFIG_ARM will always be set here, so adding this ifdef is useless.

> diff --git a/kernel/signal.c b/kernel/signal.c
> index a1abe77fcdc3..f7d03450781e 100644
> --- a/kernel/signal.c
> +++ b/kernel/signal.c
> @@ -4700,7 +4700,10 @@ __weak const char *arch_vma_name(struct vm_area_struct *vma)
>  {
>  	return NULL;
>  }
> +
> +#ifdef CONFIG_ARM64
>  EXPORT_SYMBOL_GPL(arch_vma_name);
> +#endif

Sorry, but no.

Please do the research I've now twice asked for.

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