linux-kernel - [PATCH v2 1/3] cpufreq: Export acpu_cpufreq

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Message-ID: <20220329015947.565-2-mario.limonciello@amd.com>
Date:   Mon, 28 Mar 2022 20:59:45 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     Huang Rui <ray.huang@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>
CC:     "open list:AMD PSTATE DRIVER" <linux-pm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH v2 1/3] cpufreq: Export acpu_cpufreq_exit for other drivers to call

Currently, the only way to load an alternative cpufreq driver is to unload
acpi-cpufreq first.

Loosen that restriction to allow other kernel modules to unregister a
registered driver.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v1->v2:
 * Export symbol instead of changing internals

 drivers/cpufreq/acpi-cpufreq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 3d514b82d055..92ac978c1c53 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -1033,7 +1033,7 @@ static int __init acpi_cpufreq_init(void)
 	return ret;
 }
 
-static void __exit acpi_cpufreq_exit(void)
+void __exit acpi_cpufreq_exit(void)
 {
 	pr_debug("%s\n", __func__);
 
@@ -1043,6 +1043,7 @@ static void __exit acpi_cpufreq_exit(void)
 
 	free_acpi_perf_data();
 }
+EXPORT_SYMBOL_GPL(acpi_cpufreq_exit);
 
 module_param(acpi_pstate_strict, uint, 0644);
 MODULE_PARM_DESC(acpi_pstate_strict,
-- 
2.34.1