Re: [PATCH v6 10/25] arm64: cpufeature: Export symbol read_sanitised_ftr_reg()

Suzuki K Poulose
2020-04-30T15:13:47Z

On 04/30/2020 03:34 PM, Jean-Philippe Brucker wrote:
> The SMMUv3 driver would like to read the MMFR0 PARANGE field in order to
> share CPU page tables with devices. Allow the driver to be built as
> module by exporting the read_sanitized_ftr_reg() cpufeature symbol.
>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>

Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>

> ---
> 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 9fac745aa7bb2..5f6adbf4ae893 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -841,6 +841,7 @@ u64 read_sanitised_ftr_reg(u32 id)
> BUG_ON(!regp);
> return regp->sys_val;
> }
> +EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg);
>
> #define read_sysreg_case(r) \
> case r: return read_sysreg_s(r)
>