[CPUFREQ][1/6] cpufreq: Add cpu number parameter to __cpufreq_driver_getavg()

Add a cpu parameter to __cpufreq_driver_getavg(). This is needed for software
cpufreq coordination where policy->cpu may not be same as the CPU on which we
want to getavg frequency.

A follow-on patch will use this parameter to getavg freq from all cpus
in policy->cpus.

Change since last patch. Fix the offline/online and suspend/resume
oops reported by Youquan Song <youquan.song@intel.com>

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 1def5b0..c24c4a4 100644 (file)
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -256,7 +256,8 @@ static u32 get_cur_val(const cpumask_t *mask)
  * Only IA32_APERF/IA32_MPERF ratio is architecturally defined and
  * no meaning should be associated with absolute values of these MSRs.
  */
-static unsigned int get_measured_perf(unsigned int cpu)
+static unsigned int get_measured_perf(struct cpufreq_policy *policy,
+                                     unsigned int cpu)
 {
        union {
                struct {
@@ -326,7 +327,7 @@ static unsigned int get_measured_perf(unsigned int cpu)
 
 #endif
 
-       retval = per_cpu(drv_data, cpu)->max_freq * perf_percent / 100;
+       retval = per_cpu(drv_data, policy->cpu)->max_freq * perf_percent / 100;
 
        put_cpu();
        set_cpus_allowed_ptr(current, &saved_mask);

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 9bbdc25..31d6f53 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1487,7 +1487,7 @@ no_policy:
 }
 EXPORT_SYMBOL_GPL(cpufreq_driver_target);
 
-int __cpufreq_driver_getavg(struct cpufreq_policy *policy)
+int __cpufreq_driver_getavg(struct cpufreq_policy *policy, unsigned int cpu)
 {
        int ret = 0;
 
@@ -1495,8 +1495,8 @@ int __cpufreq_driver_getavg(struct cpufreq_policy *policy)
        if (!policy)
                return -EINVAL;
 
-       if (cpu_online(policy->cpu) && cpufreq_driver->getavg)
-               ret = cpufreq_driver->getavg(policy->cpu);
+       if (cpu_online(cpu) && cpufreq_driver->getavg)
+               ret = cpufreq_driver->getavg(policy, cpu);
 
        cpufreq_cpu_put(policy);
        return ret;

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 67c9d4f..f56debd 100644 (file)
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -415,7 +415,7 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
        if (load < (dbs_tuners_ins.up_threshold - 10)) {
                unsigned int freq_next, freq_cur;
 
-               freq_cur = __cpufreq_driver_getavg(policy);
+               freq_cur = __cpufreq_driver_getavg(policy, policy->cpu);
                if (!freq_cur)
                        freq_cur = policy->cur;
 

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 6fd5668..1ee608f 100644 (file)
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -187,7 +187,8 @@ extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
                                   unsigned int relation);
 
 
-extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy);
+extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy,
+                                  unsigned int cpu);
 
 int cpufreq_register_governor(struct cpufreq_governor *governor);
 void cpufreq_unregister_governor(struct cpufreq_governor *governor);
@@ -226,7 +227,9 @@ struct cpufreq_driver {
        unsigned int    (*get)  (unsigned int cpu);
 
        /* optional */
-       unsigned int (*getavg)  (unsigned int cpu);
+       unsigned int (*getavg)  (struct cpufreq_policy *policy,
+                                unsigned int cpu);
+
        int     (*exit)         (struct cpufreq_policy *policy);
        int     (*suspend)      (struct cpufreq_policy *policy, pm_message_t pmsg);
        int     (*resume)       (struct cpufreq_policy *policy);