linux-kernel - [PATCH -next] cpufreq: CPPC: Fix build error without CONFIG_ACPI_CPPC_CPUFREQ

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Date:   Sat, 21 May 2022 11:24:38 +0800
From:   Zheng Bin <zhengbin13@...wei.com>
To:     <rafael@...nel.org>, <viresh.kumar@...aro.org>,
        <Pierre.Gondois@....com>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <zhengbin13@...wei.com>, <gaochao49@...wei.com>
Subject: [PATCH -next] cpufreq: CPPC: Fix build error without CONFIG_ACPI_CPPC_CPUFREQ_FIE

If CONFIG_ACPI_CPPC_CPUFREQ_FIE is not set, building fails:

drivers/cpufreq/cppc_cpufreq.c: In function ‘populate_efficiency_class’:
drivers/cpufreq/cppc_cpufreq.c:584:2: error: ‘cppc_cpufreq_driver’ undeclared (first use in this function); did you mean ‘cpufreq_driver’?
  cppc_cpufreq_driver.register_em = cppc_cpufreq_register_em;
  ^~~~~~~~~~~~~~~~~~~
  cpufreq_driver

Make declare of cppc_cpufreq_driver out of CONFIG_ACPI_CPPC_CPUFREQ_FIE
to fix this.

Fixes: 740fcdc2c20e ("cpufreq: CPPC: Register EM based on efficiency class information")
Signed-off-by: Zheng Bin <zhengbin13@...wei.com>
---
 drivers/cpufreq/cppc_cpufreq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 3eaa23d1aaf5..1837f2ce8243 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -61,6 +61,8 @@ static struct cppc_workaround_oem_info wa_info[] = {
 	}
 };

+static struct cpufreq_driver cppc_cpufreq_driver;
+
 #ifdef CONFIG_ACPI_CPPC_CPUFREQ_FIE

 /* Frequency invariance support */
@@ -75,7 +77,6 @@ struct cppc_freq_invariance {
 static DEFINE_PER_CPU(struct cppc_freq_invariance, cppc_freq_inv);
 static struct kthread_worker *kworker_fie;

-static struct cpufreq_driver cppc_cpufreq_driver;
 static unsigned int hisi_cppc_cpufreq_get_rate(unsigned int cpu);
 static int cppc_perf_from_fbctrs(struct cppc_cpudata *cpu_data,
 				 struct cppc_perf_fb_ctrs *fb_ctrs_t0,
--
2.31.1