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Diffstat (limited to 'target/linux/xburst/patches-3.2/0010-cpufreq_stats-Support-runtime-changes-to-frequency-t.patch')
-rw-r--r--target/linux/xburst/patches-3.2/0010-cpufreq_stats-Support-runtime-changes-to-frequency-t.patch301
1 files changed, 0 insertions, 301 deletions
diff --git a/target/linux/xburst/patches-3.2/0010-cpufreq_stats-Support-runtime-changes-to-frequency-t.patch b/target/linux/xburst/patches-3.2/0010-cpufreq_stats-Support-runtime-changes-to-frequency-t.patch
deleted file mode 100644
index 677e3c5e26..0000000000
--- a/target/linux/xburst/patches-3.2/0010-cpufreq_stats-Support-runtime-changes-to-frequency-t.patch
+++ /dev/null
@@ -1,301 +0,0 @@
-From ca40c7542f0cd0e0dfa074bd4ccefc04b8561427 Mon Sep 17 00:00:00 2001
-From: Maarten ter Huurne <maarten@treewalker.org>
-Date: Tue, 2 Aug 2011 10:26:09 +0200
-Subject: [PATCH 10/21] cpufreq_stats: Support runtime changes to frequency
- table.
-
----
- drivers/cpufreq/cpufreq_stats.c | 161 ++++++++++++++++++++-------------------
- 1 files changed, 83 insertions(+), 78 deletions(-)
-
---- a/drivers/cpufreq/cpufreq_stats.c
-+++ b/drivers/cpufreq/cpufreq_stats.c
-@@ -21,6 +21,7 @@
- #include <linux/kobject.h>
- #include <linux/spinlock.h>
- #include <linux/notifier.h>
-+#include <linux/string.h>
- #include <asm/cputime.h>
-
- static spinlock_t cpufreq_stats_lock;
-@@ -37,7 +38,7 @@ struct cpufreq_stats {
- unsigned long long last_time;
- unsigned int max_state;
- unsigned int state_num;
-- unsigned int last_index;
-+ int last_index;
- cputime64_t *time_in_state;
- unsigned int *freq_table;
- #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-@@ -60,7 +61,7 @@ static int cpufreq_stats_update(unsigned
- cur_time = get_jiffies_64();
- spin_lock(&cpufreq_stats_lock);
- stat = per_cpu(cpufreq_stats_table, cpu);
-- if (stat->time_in_state)
-+ if (stat->time_in_state && stat->last_index != -1)
- stat->time_in_state[stat->last_index] =
- cputime64_add(stat->time_in_state[stat->last_index],
- cputime_sub(cur_time, stat->last_time));
-@@ -83,7 +84,7 @@ static ssize_t show_time_in_state(struct
- ssize_t len = 0;
- int i;
- struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-- if (!stat)
-+ if (!stat || !stat->time_in_state)
- return 0;
- cpufreq_stats_update(stat->cpu);
- for (i = 0; i < stat->state_num; i++) {
-@@ -101,7 +102,7 @@ static ssize_t show_trans_table(struct c
- int i, j;
-
- struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-- if (!stat)
-+ if (!stat || !stat->trans_table)
- return 0;
- cpufreq_stats_update(stat->cpu);
- len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n");
-@@ -160,63 +161,35 @@ static struct attribute_group stats_attr
- static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
- {
- int index;
-- for (index = 0; index < stat->max_state; index++)
-- if (stat->freq_table[index] == freq)
-- return index;
-+ if (stat->freq_table)
-+ for (index = 0; index < stat->max_state; index++)
-+ if (stat->freq_table[index] == freq)
-+ return index;
- return -1;
- }
-
--/* should be called late in the CPU removal sequence so that the stats
-- * memory is still available in case someone tries to use it.
-- */
- static void cpufreq_stats_free_table(unsigned int cpu)
- {
- struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, cpu);
-+ struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
-+ if (policy && policy->cpu == cpu)
-+ sysfs_remove_group(&policy->kobj, &stats_attr_group);
- if (stat) {
- kfree(stat->time_in_state);
- kfree(stat);
- }
- per_cpu(cpufreq_stats_table, cpu) = NULL;
--}
--
--/* must be called early in the CPU removal sequence (before
-- * cpufreq_remove_dev) so that policy is still valid.
-- */
--static void cpufreq_stats_free_sysfs(unsigned int cpu)
--{
-- struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
-- if (policy && policy->cpu == cpu)
-- sysfs_remove_group(&policy->kobj, &stats_attr_group);
- if (policy)
- cpufreq_cpu_put(policy);
- }
-
--static int cpufreq_stats_create_table(struct cpufreq_policy *policy,
-+static int cpufreq_stats_update_table(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
- {
-- unsigned int i, j, count = 0, ret = 0;
-- struct cpufreq_stats *stat;
-- struct cpufreq_policy *data;
-+ unsigned int i, j, count = 0;
- unsigned int alloc_size;
- unsigned int cpu = policy->cpu;
-- if (per_cpu(cpufreq_stats_table, cpu))
-- return -EBUSY;
-- stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL);
-- if ((stat) == NULL)
-- return -ENOMEM;
--
-- data = cpufreq_cpu_get(cpu);
-- if (data == NULL) {
-- ret = -EINVAL;
-- goto error_get_fail;
-- }
--
-- ret = sysfs_create_group(&data->kobj, &stats_attr_group);
-- if (ret)
-- goto error_out;
--
-- stat->cpu = cpu;
-- per_cpu(cpufreq_stats_table, cpu) = stat;
-+ struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, cpu);
-
- for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
- unsigned int freq = table[i].frequency;
-@@ -225,40 +198,73 @@ static int cpufreq_stats_create_table(st
- count++;
- }
-
-+ if (stat->max_state != count) {
-+ stat->max_state = count;
-+ kfree(stat->time_in_state);
-+ stat->time_in_state = NULL;
-+ }
- alloc_size = count * sizeof(int) + count * sizeof(cputime64_t);
--
- #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
- alloc_size += count * count * sizeof(int);
- #endif
-- stat->max_state = count;
-- stat->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
-- if (!stat->time_in_state) {
-- ret = -ENOMEM;
-- goto error_out;
-- }
-- stat->freq_table = (unsigned int *)(stat->time_in_state + count);
--
-+ if (stat->time_in_state) {
-+ memset(stat->time_in_state, 0, alloc_size);
-+ } else {
-+ stat->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
-+ if (!stat->time_in_state)
-+ return -ENOMEM;
-+ stat->freq_table = (unsigned int *)(
-+ stat->time_in_state + count);
- #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-- stat->trans_table = stat->freq_table + count;
-+ stat->trans_table = stat->freq_table + count;
- #endif
-+ }
-+
- j = 0;
-- for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
-- unsigned int freq = table[i].frequency;
-- if (freq == CPUFREQ_ENTRY_INVALID)
-- continue;
-- if (freq_table_get_index(stat, freq) == -1)
-- stat->freq_table[j++] = freq;
-+ if (stat->freq_table) {
-+ for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
-+ unsigned int freq = table[i].frequency;
-+ if (freq == CPUFREQ_ENTRY_INVALID)
-+ continue;
-+ if (freq_table_get_index(stat, freq) == -1)
-+ stat->freq_table[j++] = freq;
-+ }
- }
- stat->state_num = j;
- spin_lock(&cpufreq_stats_lock);
- stat->last_time = get_jiffies_64();
- stat->last_index = freq_table_get_index(stat, policy->cur);
- spin_unlock(&cpufreq_stats_lock);
-+ return 0;
-+}
-+
-+static int cpufreq_stats_create_table(struct cpufreq_policy *policy,
-+ struct cpufreq_frequency_table *table)
-+{
-+ unsigned int ret = 0;
-+ struct cpufreq_stats *stat;
-+ struct cpufreq_policy *data;
-+ unsigned int cpu = policy->cpu;
-+
-+ stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL);
-+ if ((stat) == NULL)
-+ return -ENOMEM;
-+
-+ data = cpufreq_cpu_get(cpu);
-+ if (data == NULL) {
-+ ret = -EINVAL;
-+ goto error_out;
-+ }
-+ ret = sysfs_create_group(&data->kobj, &stats_attr_group);
- cpufreq_cpu_put(data);
-+ if (ret)
-+ goto error_out;
-+
-+ stat->cpu = cpu;
-+ per_cpu(cpufreq_stats_table, cpu) = stat;
-+
- return 0;
- error_out:
-- cpufreq_cpu_put(data);
--error_get_fail:
- kfree(stat);
- per_cpu(cpufreq_stats_table, cpu) = NULL;
- return ret;
-@@ -276,10 +282,12 @@ static int cpufreq_stat_notifier_policy(
- table = cpufreq_frequency_get_table(cpu);
- if (!table)
- return 0;
-- ret = cpufreq_stats_create_table(policy, table);
-- if (ret)
-- return ret;
-- return 0;
-+ if (!per_cpu(cpufreq_stats_table, cpu)) {
-+ ret = cpufreq_stats_create_table(policy, table);
-+ if (ret)
-+ return ret;
-+ }
-+ return cpufreq_stats_update_table(policy, table);
- }
-
- static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
-@@ -299,21 +307,23 @@ static int cpufreq_stat_notifier_trans(s
- old_index = stat->last_index;
- new_index = freq_table_get_index(stat, freq->new);
-
-- /* We can't do stat->time_in_state[-1]= .. */
-- if (old_index == -1 || new_index == -1)
-- return 0;
--
- cpufreq_stats_update(freq->cpu);
--
- if (old_index == new_index)
- return 0;
-
-+ if (new_index == -1)
-+ return 0;
-+
- spin_lock(&cpufreq_stats_lock);
- stat->last_index = new_index;
-+ if (old_index != -1) {
- #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-- stat->trans_table[old_index * stat->max_state + new_index]++;
-+ if (stat->trans_table)
-+ stat->trans_table[old_index * stat->max_state +
-+ new_index]++;
- #endif
-- stat->total_trans++;
-+ stat->total_trans++;
-+ }
- spin_unlock(&cpufreq_stats_lock);
- return 0;
- }
-@@ -329,9 +339,6 @@ static int __cpuinit cpufreq_stat_cpu_ca
- case CPU_ONLINE_FROZEN:
- cpufreq_update_policy(cpu);
- break;
-- case CPU_DOWN_PREPARE:
-- cpufreq_stats_free_sysfs(cpu);
-- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- cpufreq_stats_free_table(cpu);
-@@ -340,10 +347,9 @@ static int __cpuinit cpufreq_stat_cpu_ca
- return NOTIFY_OK;
- }
-
--/* priority=1 so this will get called before cpufreq_remove_dev */
--static struct notifier_block cpufreq_stat_cpu_notifier __refdata = {
-+static struct notifier_block cpufreq_stat_cpu_notifier __refdata =
-+{
- .notifier_call = cpufreq_stat_cpu_callback,
-- .priority = 1,
- };
-
- static struct notifier_block notifier_policy_block = {
-@@ -390,7 +396,6 @@ static void __exit cpufreq_stats_exit(vo
- unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
- for_each_online_cpu(cpu) {
- cpufreq_stats_free_table(cpu);
-- cpufreq_stats_free_sysfs(cpu);
- }
- }
-
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