Re: [PATCH] [RFC] arm64: export this_cpu_has_cap

[Suzuki K Poulose]

Hi Arnd

Thanks for the fix.

On 29/10/2021 12:30, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> It's now used in a coresight driver that can be a loadable module:
>
> ERROR: modpost: "this_cpu_has_cap" [drivers/hwtracing/coresight/coresight-trbe.ko] undefined!
>
> Fixes: 8a1065127d95 ("coresight: trbe: Add infrastructure for Errata handling")

Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Tested-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>

Will, Catalin, Mathieu,

Do you have a preference on how this fix can be pulled in ? This may
be safe to go via coresight tree if it is not too late. Otherwise,
it could go via the arm64 tree.

Suzuki

> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> Not sure if we actually want this to be exported, this is my local
> workaround for the randconfig build bot.
> ---
>   arch/arm64/kernel/cpufeature.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index ecbdff795f5e..beccbcfa7391 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -2864,6 +2864,7 @@ bool this_cpu_has_cap(unsigned int n)
>   
>   	return false;
>   }
> +EXPORT_SYMBOL(this_cpu_has_cap);
>   
>   /*
>    * This helper function is used in a narrow window when,