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cpufreq: Clean up default and fallback governor setup

Browse Source 
The preprocessor magic used for setting the default cpufreq governor
(and for using the performance governor as a fallback one for that
matter) is really nasty, so replace it with __weak functions and
overrides.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Saravana Kannan <skannan@codeaurora.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2016-02-05 02:37:42 +01:00
parent 36f90b0a2d
commit de1df26b7c
7 changed files with 73 additions and 73 deletions
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37
drivers/cpufreq/cpufreq.c
View File

@ -959,6 +959,11 @@ static int cpufreq_add_dev_interface(struct cpufreq_policy *policy)
return cpufreq_add_dev_symlink(policy);
}
__weak struct cpufreq_governor *cpufreq_default_governor(void)
{
return NULL;
}
static int cpufreq_init_policy(struct cpufreq_policy *policy)
{
struct cpufreq_governor *gov = NULL;
@ -968,11 +973,14 @@ static int cpufreq_init_policy(struct cpufreq_policy *policy)
/* Update governor of new_policy to the governor used before hotplug */
gov = find_governor(policy->last_governor);
if (gov)
if (gov) {
pr_debug("Restoring governor %s for cpu %d\n",
policy->governor->name, policy->cpu);
else
gov = CPUFREQ_DEFAULT_GOVERNOR;
} else {
gov = cpufreq_default_governor();
if (!gov)
return -ENODATA;
}
new_policy.governor = gov;
@ -1920,21 +1928,16 @@ int cpufreq_driver_target(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_driver_target);
__weak struct cpufreq_governor *cpufreq_fallback_governor(void)
{
return NULL;
}
static int __cpufreq_governor(struct cpufreq_policy *policy,
unsigned int event)
{
int ret;
/* Only must be defined when default governor is known to have latency
restrictions, like e.g. conservative or ondemand.
That this is the case is already ensured in Kconfig
*/
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
struct cpufreq_governor *gov = &cpufreq_gov_performance;
#else
struct cpufreq_governor *gov = NULL;
#endif
/* Don't start any governor operations if we are entering suspend */
if (cpufreq_suspended)
return 0;
@ -1948,12 +1951,14 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
if (policy->governor->max_transition_latency &&
policy->cpuinfo.transition_latency >
policy->governor->max_transition_latency) {
if (!gov)
return -EINVAL;
else {
struct cpufreq_governor *gov = cpufreq_fallback_governor();
if (gov) {
pr_warn("%s governor failed, too long transition latency of HW, fallback to %s governor\n",
policy->governor->name, gov->name);
policy->governor = gov;
} else {
return -EINVAL;
}
}

10
drivers/cpufreq/cpufreq_conservative.c
View File

@ -26,10 +26,7 @@ static DEFINE_PER_CPU(struct cs_cpu_dbs_info_s, cs_cpu_dbs_info);
static int cs_cpufreq_governor_dbs(struct cpufreq_policy *policy,
unsigned int event);
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
static
#endif
struct cpufreq_governor cpufreq_gov_conservative = {
static struct cpufreq_governor cpufreq_gov_conservative = {
.name = "conservative",
.governor = cs_cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
@ -399,6 +396,11 @@ MODULE_DESCRIPTION("'cpufreq_conservative' - A dynamic cpufreq governor for "
MODULE_LICENSE("GPL");
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
struct cpufreq_governor *cpufreq_default_governor(void)
{
return &cpufreq_gov_conservative;
}
fs_initcall(cpufreq_gov_dbs_init);
#else
module_init(cpufreq_gov_dbs_init);

36
drivers/cpufreq/cpufreq_ondemand.c
View File

@ -31,9 +31,7 @@ static DEFINE_PER_CPU(struct od_cpu_dbs_info_s, od_cpu_dbs_info);
static struct od_ops od_ops;
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
static struct cpufreq_governor cpufreq_gov_ondemand;
#endif
static unsigned int default_powersave_bias;
@ -554,6 +552,19 @@ static struct common_dbs_data od_dbs_cdata = {
.mutex = __MUTEX_INITIALIZER(od_dbs_cdata.mutex),
};
static int od_cpufreq_governor_dbs(struct cpufreq_policy *policy,
unsigned int event)
{
return cpufreq_governor_dbs(policy, &od_dbs_cdata, event);
}
static struct cpufreq_governor cpufreq_gov_ondemand = {
.name = "ondemand",
.governor = od_cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
};
static void od_set_powersave_bias(unsigned int powersave_bias)
{
struct cpufreq_policy *policy;
@ -605,22 +616,6 @@ void od_unregister_powersave_bias_handler(void)
}
EXPORT_SYMBOL_GPL(od_unregister_powersave_bias_handler);
static int od_cpufreq_governor_dbs(struct cpufreq_policy *policy,
unsigned int event)
{
return cpufreq_governor_dbs(policy, &od_dbs_cdata, event);
}
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
static
#endif
struct cpufreq_governor cpufreq_gov_ondemand = {
.name = "ondemand",
.governor = od_cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
};
static int __init cpufreq_gov_dbs_init(void)
{
return cpufreq_register_governor(&cpufreq_gov_ondemand);
@ -638,6 +633,11 @@ MODULE_DESCRIPTION("'cpufreq_ondemand' - A dynamic cpufreq governor for "
MODULE_LICENSE("GPL");
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND
struct cpufreq_governor *cpufreq_default_governor(void)
{
return &cpufreq_gov_ondemand;
}
fs_initcall(cpufreq_gov_dbs_init);
#else
module_init(cpufreq_gov_dbs_init);

18
drivers/cpufreq/cpufreq_performance.c
View File

@ -33,10 +33,7 @@ static int cpufreq_governor_performance(struct cpufreq_policy *policy,
return 0;
}
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE_MODULE
static
#endif
struct cpufreq_governor cpufreq_gov_performance = {
static struct cpufreq_governor cpufreq_gov_performance = {
.name = "performance",
.governor = cpufreq_governor_performance,
.owner = THIS_MODULE,
@ -52,6 +49,19 @@ static void __exit cpufreq_gov_performance_exit(void)
cpufreq_unregister_governor(&cpufreq_gov_performance);
}
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
struct cpufreq_governor *cpufreq_default_governor(void)
{
return &cpufreq_gov_performance;
}
#endif
#ifndef CONFIG_CPU_FREQ_GOV_PERFORMANCE_MODULE
struct cpufreq_governor *cpufreq_fallback_governor(void)
{
return &cpufreq_gov_performance;
}
#endif
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
MODULE_LICENSE("GPL");

10
drivers/cpufreq/cpufreq_powersave.c
View File

@ -33,10 +33,7 @@ static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
return 0;
}
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
static
#endif
struct cpufreq_governor cpufreq_gov_powersave = {
static struct cpufreq_governor cpufreq_gov_powersave = {
.name = "powersave",
.governor = cpufreq_governor_powersave,
.owner = THIS_MODULE,
@ -57,6 +54,11 @@ MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
MODULE_LICENSE("GPL");
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
struct cpufreq_governor *cpufreq_default_governor(void)
{
return &cpufreq_gov_powersave;
}
fs_initcall(cpufreq_gov_powersave_init);
#else
module_init(cpufreq_gov_powersave_init);

10
drivers/cpufreq/cpufreq_userspace.c
View File

@ -89,10 +89,7 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
return rc;
}
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
static
#endif
struct cpufreq_governor cpufreq_gov_userspace = {
static struct cpufreq_governor cpufreq_gov_userspace = {
.name = "userspace",
.governor = cpufreq_governor_userspace,
.store_setspeed = cpufreq_set,
@ -116,6 +113,11 @@ MODULE_DESCRIPTION("CPUfreq policy governor 'userspace'");
MODULE_LICENSE("GPL");
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
struct cpufreq_governor *cpufreq_default_governor(void)
{
return &cpufreq_gov_userspace;
}
fs_initcall(cpufreq_gov_userspace_init);
#else
module_init(cpufreq_gov_userspace_init);

25
include/linux/cpufreq.h
View File

@ -464,29 +464,8 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
int cpufreq_register_governor(struct cpufreq_governor *governor);
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
/* CPUFREQ DEFAULT GOVERNOR */
/*
* Performance governor is fallback governor if any other gov failed to auto
* load due latency restrictions
*/
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
extern struct cpufreq_governor cpufreq_gov_performance;
#endif
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance)
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE)
extern struct cpufreq_governor cpufreq_gov_powersave;
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave)
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
extern struct cpufreq_governor cpufreq_gov_userspace;
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace)
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND)
extern struct cpufreq_governor cpufreq_gov_ondemand;
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand)
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE)
extern struct cpufreq_governor cpufreq_gov_conservative;
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative)
#endif
struct cpufreq_governor *cpufreq_default_governor(void);
struct cpufreq_governor *cpufreq_fallback_governor(void);
/*********************************************************************
* FREQUENCY TABLE HELPERS *