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

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Date:   Wed, 25 Nov 2020 23:48:47 +0900
From:   Punit Agrawal <punitagrawal@...il.com>
To:     rjw@...ysocki.net
Cc:     Punit Agrawal <punitagrawal@...il.com>, wei.huang2@....com,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        bp@...en8.de, x86@...nel.org
Subject: [RFC PATCH 4/4] cpufreq: acpi-cpufreq: Use identifiers for AMD processor family

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@...il.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 &&
 			  c->x86_stepping == 0x1);
 	}
 
@@ -735,7 +735,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	switch (perf->control_register.space_id) {
 	case ACPI_ADR_SPACE_SYSTEM_IO:
 		if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
-		    boot_cpu_data.x86 == 0xf) {
+		    boot_cpu_data.x86 == AMD_FAM_K8) {
 			pr_debug("AMD K8 systems must use native drivers.\n");
 			result = -ENODEV;
 			goto err_unreg;
-- 
2.29.2