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

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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>
This commit is contained in:
venkatesh.pallipadi@intel.com 2008-08-04 11:59:07 -07:00 committed by Dave Jones
parent 8217e4f4c9
commit bf0b90e357
4 changed files with 12 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
View File

@ -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);

6
drivers/cpufreq/cpufreq.c
View File

@ -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;

2
drivers/cpufreq/cpufreq_ondemand.c
View File

@ -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;

7
include/linux/cpufreq.h
View File

@ -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);