[PATCH 03/14] cpufreq: intel_pstate: Initialize pid_params statically

[Rafael J. Wysocki]

From: Rafael J. Wysocki <rafael.j.wyso...@intel.com>

Notice that both the existing struct cpu_defaults instances in which
PID parameters are actually initialized use the same values of those
parameters, so it is not really necessary to copy them over to
pid_params dynamically.

Instead, initialize pid_params statically with those values and
drop the unused pid_policy member from struct cpu_defaults along
with copy_pid_params() used for initializing it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
---
 drivers/cpufreq/intel_pstate.c |   42 +++++++++--------------------------------
 1 file changed, 10 insertions(+), 32 deletions(-)

Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -342,19 +342,26 @@ struct pstate_funcs {
 
 /**
  * struct cpu_defaults- Per CPU model default config data
- * @pid_policy:        PID config data
  * @funcs:             Callback function data
  */
 struct cpu_defaults {
-       struct pstate_adjust_policy pid_policy;
        struct pstate_funcs funcs;
 };
 
 static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu);
 static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu);
 
-static struct pstate_adjust_policy pid_params __read_mostly;
 static struct pstate_funcs pstate_funcs __read_mostly;
+static struct pstate_adjust_policy pid_params __read_mostly = {
+       .sample_rate_ms = 10,
+       .sample_rate_ns = 10 * NSEC_PER_MSEC,
+       .deadband = 0,
+       .setpoint = 97,
+       .p_gain_pct = 20,
+       .d_gain_pct = 0,
+       .i_gain_pct = 0,
+};
+
 static int hwp_active __read_mostly;
 static bool per_cpu_limits __read_mostly;
 
@@ -1572,14 +1579,6 @@ static int knl_get_turbo_pstate(void)
 }
 
 static struct cpu_defaults core_params = {
-       .pid_policy = {
-               .sample_rate_ms = 10,
-               .deadband = 0,
-               .setpoint = 97,
-               .p_gain_pct = 20,
-               .d_gain_pct = 0,
-               .i_gain_pct = 0,
-       },
        .funcs = {
                .get_max = core_get_max_pstate,
                .get_max_physical = core_get_max_pstate_physical,
@@ -1618,14 +1617,6 @@ static const struct cpu_defaults airmont
 };
 
 static const struct cpu_defaults knl_params = {
-       .pid_policy = {
-               .sample_rate_ms = 10,
-               .deadband = 0,
-               .setpoint = 97,
-               .p_gain_pct = 20,
-               .d_gain_pct = 0,
-               .i_gain_pct = 0,
-       },
        .funcs = {
                .get_max = core_get_max_pstate,
                .get_max_physical = core_get_max_pstate_physical,
@@ -2506,17 +2497,6 @@ static int __init intel_pstate_msrs_not_
        return 0;
 }
 
-static void __init copy_pid_params(struct pstate_adjust_policy *policy)
-{
-       pid_params.sample_rate_ms = policy->sample_rate_ms;
-       pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
-       pid_params.p_gain_pct = policy->p_gain_pct;
-       pid_params.i_gain_pct = policy->i_gain_pct;
-       pid_params.d_gain_pct = policy->d_gain_pct;
-       pid_params.deadband = policy->deadband;
-       pid_params.setpoint = policy->setpoint;
-}
-
 #ifdef CONFIG_ACPI
 static void intel_pstate_use_acpi_profile(void)
 {
@@ -2698,8 +2678,6 @@ static int __init intel_pstate_init(void
 
        cpu_def = (struct cpu_defaults *)id->driver_data;
        copy_cpu_funcs(&cpu_def->funcs);
-       if (pstate_funcs.get_target_pstate == get_target_pstate_use_performance)
-               copy_pid_params(&cpu_def->pid_policy);
 
        if (intel_pstate_msrs_not_valid())
                return -ENODEV;