Re: [RFC PATCH 4/4] cpufreq: acpi-cpufreq: Use identifiers for AMD processor family

Borislav Petkov
2020-11-30T14:03:06Z

On Wed, Nov 25, 2020 at 11:48:47PM +0900, Punit Agrawal wrote:
> Replace the raw values for AMD processor family with recently
> introduced identifier macros to improve code readability and
> maintainability.
>
> Signed-off-by: Punit Agrawal <punitagrawal@gmail.com>
> ---
> drivers/cpufreq/acpi-cpufreq.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
> index 29f1cd93541e..d8b8300ae9e0 100644
> --- a/drivers/cpufreq/acpi-cpufreq.c
> +++ b/drivers/cpufreq/acpi-cpufreq.c
> @@ -202,8 +202,8 @@ static int override_acpi_psd(unsigned int cpu_id)
> * CPU's before Zen3 (except some Zen2) need the
> * override.
> */
> - return (c->x86 < 0x19) &&
> - !(c->x86 == 0x17 && c->x86_model == 0x60 &&
> + return (c->x86 < AMD_FAM_ZEN3) &&
> + !(c->x86 == AMD_FAM_ZEN && c->x86_model == 0x60 &&

This is what I mean - that's Zen2 as the comment above says so having

c->x86 == AMD_FAM_ZEN

is not enough. And you have a comment above it stating which CPUs are
matched here so I'm not sure those family defines make it any better...

--
Regards/Gruss,
Boris.