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authorDavid S. Miller <davem@davemloft.net>2010-05-12 00:05:35 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-12 00:05:35 -0700
commit278554bd6579206921f5d8a523649a7a57f8850d (patch)
tree4e6c527daf0910e455b3aa72e2c96b0479e430be /drivers/cpufreq
parent5a147e8bf982f9dd414c1dd751fe02c1942506b2 (diff)
parentcea0d767c29669bf89f86e4aee46ef462d2ebae8 (diff)
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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: Documentation/feature-removal-schedule.txt drivers/net/wireless/ath/ar9170/usb.c drivers/scsi/iscsi_tcp.c net/ipv4/ipmr.c
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/cpufreq.c19
-rw-r--r--drivers/cpufreq/cpufreq_conservative.c8
2 files changed, 20 insertions, 7 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2d5d575..75d293e 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1113,6 +1113,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
unsigned int cpu = sys_dev->id;
unsigned long flags;
struct cpufreq_policy *data;
+ struct kobject *kobj;
+ struct completion *cmp;
#ifdef CONFIG_SMP
struct sys_device *cpu_sys_dev;
unsigned int j;
@@ -1141,10 +1143,11 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
dprintk("removing link\n");
cpumask_clear_cpu(cpu, data->cpus);
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
- sysfs_remove_link(&sys_dev->kobj, "cpufreq");
+ kobj = &sys_dev->kobj;
cpufreq_cpu_put(data);
cpufreq_debug_enable_ratelimit();
unlock_policy_rwsem_write(cpu);
+ sysfs_remove_link(kobj, "cpufreq");
return 0;
}
#endif
@@ -1181,7 +1184,10 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
data->governor->name, CPUFREQ_NAME_LEN);
#endif
cpu_sys_dev = get_cpu_sysdev(j);
- sysfs_remove_link(&cpu_sys_dev->kobj, "cpufreq");
+ kobj = &cpu_sys_dev->kobj;
+ unlock_policy_rwsem_write(cpu);
+ sysfs_remove_link(kobj, "cpufreq");
+ lock_policy_rwsem_write(cpu);
cpufreq_cpu_put(data);
}
}
@@ -1192,19 +1198,22 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
if (cpufreq_driver->target)
__cpufreq_governor(data, CPUFREQ_GOV_STOP);
- kobject_put(&data->kobj);
+ kobj = &data->kobj;
+ cmp = &data->kobj_unregister;
+ unlock_policy_rwsem_write(cpu);
+ kobject_put(kobj);
/* we need to make sure that the underlying kobj is actually
* not referenced anymore by anybody before we proceed with
* unloading.
*/
dprintk("waiting for dropping of refcount\n");
- wait_for_completion(&data->kobj_unregister);
+ wait_for_completion(cmp);
dprintk("wait complete\n");
+ lock_policy_rwsem_write(cpu);
if (cpufreq_driver->exit)
cpufreq_driver->exit(data);
-
unlock_policy_rwsem_write(cpu);
free_cpumask_var(data->related_cpus);
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 599a40b..3a14787 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -444,6 +444,7 @@ static struct attribute_group dbs_attr_group_old = {
static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
{
unsigned int load = 0;
+ unsigned int max_load = 0;
unsigned int freq_target;
struct cpufreq_policy *policy;
@@ -501,6 +502,9 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
continue;
load = 100 * (wall_time - idle_time) / wall_time;
+
+ if (load > max_load)
+ max_load = load;
}
/*
@@ -511,7 +515,7 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
return;
/* Check for frequency increase */
- if (load > dbs_tuners_ins.up_threshold) {
+ if (max_load > dbs_tuners_ins.up_threshold) {
this_dbs_info->down_skip = 0;
/* if we are already at full speed then break out early */
@@ -538,7 +542,7 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
* can support the current CPU usage without triggering the up
* policy. To be safe, we focus 10 points under the threshold.
*/
- if (load < (dbs_tuners_ins.down_threshold - 10)) {
+ if (max_load < (dbs_tuners_ins.down_threshold - 10)) {
freq_target = (dbs_tuners_ins.freq_step * policy->max) / 100;
this_dbs_info->requested_freq -= freq_target;