Conservative governor has its own 'enable' field to check if conservative governor is used for a CPU or not
This can be checked by policy->governor with 'cpufreq_gov_conservative' and so this field can be dropped.
Because its not guaranteed that dbs_info->cdbs.shared will a valid pointer for all CPUs (will be NULL for CPUs that don't use ondemand/conservative governors), we can't use it anymore. Lets get policy with cpufreq_cpu_get() instead.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- drivers/cpufreq/cpufreq_conservative.c | 34 +++++++++++++++++++++------------- drivers/cpufreq/cpufreq_governor.c | 12 +----------- drivers/cpufreq/cpufreq_governor.h | 1 - 3 files changed, 22 insertions(+), 25 deletions(-)
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 84a1506950a7..18bfbc313e48 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -23,6 +23,19 @@
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 = { + .name = "conservative", + .governor = cs_cpufreq_governor_dbs, + .max_transition_latency = TRANSITION_LATENCY_LIMIT, + .owner = THIS_MODULE, +}; + static inline unsigned int get_freq_target(struct cs_dbs_tuners *cs_tuners, struct cpufreq_policy *policy) { @@ -119,12 +132,14 @@ static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val, struct cpufreq_freqs *freq = data; struct cs_cpu_dbs_info_s *dbs_info = &per_cpu(cs_cpu_dbs_info, freq->cpu); - struct cpufreq_policy *policy; + struct cpufreq_policy *policy = cpufreq_cpu_get(freq->cpu);
- if (!dbs_info->enable) + if (!policy) return 0;
- policy = dbs_info->cdbs.shared->policy; + /* policy isn't governed by conservative governor */ + if (policy->governor != &cpufreq_gov_conservative) + goto policy_put;
/* * we only care if our internally tracked freq moves outside the 'valid' @@ -134,6 +149,9 @@ static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val, || dbs_info->requested_freq < policy->min) dbs_info->requested_freq = freq->new;
+policy_put: + cpufreq_cpu_put(policy); + return 0; }
@@ -367,16 +385,6 @@ static int cs_cpufreq_governor_dbs(struct cpufreq_policy *policy, return cpufreq_governor_dbs(policy, &cs_dbs_cdata, event); }
-#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE -static -#endif -struct cpufreq_governor cpufreq_gov_conservative = { - .name = "conservative", - .governor = cs_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_conservative); diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index 939197ffa4ac..750626d8fb03 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -463,7 +463,6 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy, cdata->get_cpu_dbs_info_s(cpu);
cs_dbs_info->down_skip = 0; - cs_dbs_info->enable = 1; cs_dbs_info->requested_freq = policy->cur; } else { struct od_ops *od_ops = cdata->gov_ops; @@ -482,9 +481,7 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy, static int cpufreq_governor_stop(struct cpufreq_policy *policy, struct dbs_data *dbs_data) { - struct common_dbs_data *cdata = dbs_data->cdata; - unsigned int cpu = policy->cpu; - struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu); + struct cpu_dbs_info *cdbs = dbs_data->cdata->get_cpu_cdbs(policy->cpu); struct cpu_common_dbs_info *shared = cdbs->shared;
/* State should be equivalent to START */ @@ -493,13 +490,6 @@ static int cpufreq_governor_stop(struct cpufreq_policy *policy,
gov_cancel_work(dbs_data, policy);
- if (cdata->governor == GOV_CONSERVATIVE) { - struct cs_cpu_dbs_info_s *cs_dbs_info = - cdata->get_cpu_dbs_info_s(cpu); - - cs_dbs_info->enable = 0; - } - shared->policy = NULL; mutex_destroy(&shared->timer_mutex); return 0; diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index 50f171796632..5621bb03e874 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -170,7 +170,6 @@ struct cs_cpu_dbs_info_s { struct cpu_dbs_info cdbs; unsigned int down_skip; unsigned int requested_freq; - unsigned int enable:1; };
/* Per policy Governors sysfs tunables */