diff options
| author | Thomas Renninger <trenn@suse.de> | 2009-07-24 15:25:05 +0200 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2009-09-01 12:45:14 -0400 |
| commit | 8aa84ad8d6c740a04386f599694609ee4998e82e (patch) | |
| tree | b5bedf4203f038c0f624d3240d9d23dbc9e20e63 | |
| parent | 4bfa042cd304aa48cf05cd0a13c2d0794a675c0e (diff) | |
[CPUFREQ] Introduce global, not per core: /sys/devices/system/cpu/cpufreq
Currently everything in the cpufreq layer is per core based.
This does not reflect reality, for example ondemand on conservative
governors have global sysfs variables.
Introduce a global cpufreq directory and add the kobject to the governor
struct, so that governors can easily access it.
The directory is initialized in the cpufreq_core_init initcall and thus will
always be created if cpufreq is compiled in, even if no cpufreq driver is
active later.
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dave Jones <davej@redhat.com>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 9 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 10 |
2 files changed, 18 insertions, 1 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index bbd5c2164ab6..4da28444b235 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -686,6 +686,9 @@ static struct attribute *default_attrs[] = { NULL }; +struct kobject *cpufreq_global_kobject; +EXPORT_SYMBOL(cpufreq_global_kobject); + #define to_policy(k) container_of(k, struct cpufreq_policy, kobj) #define to_attr(a) container_of(a, struct freq_attr, attr) @@ -1935,7 +1938,11 @@ static int __init cpufreq_core_init(void) per_cpu(policy_cpu, cpu) = -1; init_rwsem(&per_cpu(cpu_policy_rwsem, cpu)); } + + cpufreq_global_kobject = kobject_create_and_add("cpufreq", + &cpu_sysdev_class.kset.kobj); + BUG_ON(!cpufreq_global_kobject); + return 0; } - core_initcall(cpufreq_core_init); diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 161042746afc..44717eb47639 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -65,6 +65,9 @@ static inline int cpufreq_unregister_notifier(struct notifier_block *nb, struct cpufreq_governor; +/* /sys/devices/system/cpu/cpufreq: entry point for global variables */ +extern struct kobject *cpufreq_global_kobject; + #define CPUFREQ_ETERNAL (-1) struct cpufreq_cpuinfo { unsigned int max_freq; @@ -274,6 +277,13 @@ struct freq_attr { ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); }; +struct global_attr { + struct attribute attr; + ssize_t (*show)(struct kobject *kobj, + struct attribute *attr, char *buf); + ssize_t (*store)(struct kobject *a, struct attribute *b, + const char *c, size_t count); +}; /********************************************************************* * CPUFREQ 2.6. INTERFACE * |