WorkStruct: make allyesconfig

[linux-2.6-omap-h63xx.git] / drivers / cpufreq / cpufreq.c

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 9b416372a8e426d94fe6248a36b46b56669d6a3c..7a7c6e6dfe4ff20acc0a5a59724f2e435b947d3a 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -32,7 +32,7 @@
 #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, "cpufreq-core", msg)
 
 /**
- * The "cpufreq driver" - the arch- or hardware-dependend low
+ * The "cpufreq driver" - the arch- or hardware-dependent low
  * level driver of CPUFreq support, and its spinlock. This lock
  * also protects the cpufreq_cpu_data array.
  */
@@ -42,7 +42,7 @@ static DEFINE_SPINLOCK(cpufreq_driver_lock);
 
 /* internal prototypes */
 static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
-static void handle_update(void *data);
+static void handle_update(struct work_struct *work);
 
 /**
  * Two notifier lists: the "policy" list is involved in the
@@ -52,8 +52,14 @@ static void handle_update(void *data);
  * The mutex locks both lists.
  */
 static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list);
-static BLOCKING_NOTIFIER_HEAD(cpufreq_transition_notifier_list);
+static struct srcu_notifier_head cpufreq_transition_notifier_list;
 
+static int __init init_cpufreq_transition_notifier_list(void)
+{
+       srcu_init_notifier_head(&cpufreq_transition_notifier_list);
+       return 0;
+}
+pure_initcall(init_cpufreq_transition_notifier_list);
 
 static LIST_HEAD(cpufreq_governor_list);
 static DEFINE_MUTEX (cpufreq_governor_mutex);
@@ -262,14 +268,14 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state)
                                freqs->old = policy->cur;
                        }
                }
-               blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+               srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
                                CPUFREQ_PRECHANGE, freqs);
                adjust_jiffies(CPUFREQ_PRECHANGE, freqs);
                break;
 
        case CPUFREQ_POSTCHANGE:
                adjust_jiffies(CPUFREQ_POSTCHANGE, freqs);
-               blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+               srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
                                CPUFREQ_POSTCHANGE, freqs);
                if (likely(policy) && likely(policy->cpu == freqs->cpu))
                        policy->cur = freqs->new;
@@ -321,6 +327,23 @@ static int cpufreq_parse_governor (char *str_governor, unsigned int *policy,
 
                t = __find_governor(str_governor);
 
+               if (t == NULL) {
+                       char *name = kasprintf(GFP_KERNEL, "cpufreq_%s", str_governor);
+
+                       if (name) {
+                               int ret;
+
+                               mutex_unlock(&cpufreq_governor_mutex);
+                               ret = request_module(name);
+                               mutex_lock(&cpufreq_governor_mutex);
+
+                               if (ret == 0)
+                                       t = __find_governor(str_governor);
+                       }
+
+                       kfree(name);
+               }
+
                if (t != NULL) {
                        *governor = t;
                        err = 0;
@@ -642,7 +665,7 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
        mutex_init(&policy->lock);
        mutex_lock(&policy->lock);
        init_completion(&policy->kobj_unregister);
-       INIT_WORK(&policy->update, handle_update, (void *)(long)cpu);
+       INIT_WORK(&policy->update, handle_update);
 
        /* call driver. From then on the cpufreq must be able
         * to accept all calls to ->verify and ->setpolicy for this CPU
@@ -872,9 +895,11 @@ static int cpufreq_remove_dev (struct sys_device * sys_dev)
 }
 
 
-static void handle_update(void *data)
+static void handle_update(struct work_struct *work)
 {
-       unsigned int cpu = (unsigned int)(long)data;
+       struct cpufreq_policy *policy =
+               container_of(work, struct cpufreq_policy, update);
+       unsigned int cpu = policy->cpu;
        dprintk("handle_update for cpu %u called\n", cpu);
        cpufreq_update_policy(cpu);
 }
@@ -977,7 +1002,7 @@ static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg)
        unsigned int cur_freq = 0;
        struct cpufreq_policy *cpu_policy;
 
-       dprintk("resuming cpu %u\n", cpu);
+       dprintk("suspending cpu %u\n", cpu);
 
        if (!cpu_online(cpu))
                return 0;
@@ -1032,7 +1057,7 @@ static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg)
                freqs.old = cpu_policy->cur;
                freqs.new = cur_freq;
 
-               blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+               srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
                                    CPUFREQ_SUSPENDCHANGE, &freqs);
                adjust_jiffies(CPUFREQ_SUSPENDCHANGE, &freqs);
 
@@ -1113,7 +1138,7 @@ static int cpufreq_resume(struct sys_device * sysdev)
                        freqs.old = cpu_policy->cur;
                        freqs.new = cur_freq;
 
-                       blocking_notifier_call_chain(
+                       srcu_notifier_call_chain(
                                        &cpufreq_transition_notifier_list,
                                        CPUFREQ_RESUMECHANGE, &freqs);
                        adjust_jiffies(CPUFREQ_RESUMECHANGE, &freqs);
@@ -1159,7 +1184,7 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
 
        switch (list) {
        case CPUFREQ_TRANSITION_NOTIFIER:
-               ret = blocking_notifier_chain_register(
+               ret = srcu_notifier_chain_register(
                                &cpufreq_transition_notifier_list, nb);
                break;
        case CPUFREQ_POLICY_NOTIFIER:
@@ -1191,7 +1216,7 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list)
 
        switch (list) {
        case CPUFREQ_TRANSITION_NOTIFIER:
-               ret = blocking_notifier_chain_unregister(
+               ret = srcu_notifier_chain_unregister(
                                &cpufreq_transition_notifier_list, nb);
                break;
        case CPUFREQ_POLICY_NOTIFIER: