[PATCH v5 2/8] cpufreq: Use cpufreq_for_each_* macros for frequency table iteration

Prabhakar Lad prabhakar.csengg at gmail.com
Sat Apr 26 02:57:46 PDT 2014


Hi Stratos,

Thanks for the patch,

On Sat, Apr 26, 2014 at 1:45 AM, Stratos Karafotis
<stratosk at semaphore.gr> wrote:
> The cpufreq core now supports the cpufreq_for_each_entry and
> cpufreq_for_each_valid_entry macros helpers for iteration over the
> cpufreq_frequency_table, so use them.
>
> It should have no functional changes.
>
> Signed-off-by: Stratos Karafotis <stratosk at semaphore.gr>

For patches 1 & 2:  Acked-by: Lad, Prabhakar <prabhakar.csengg at gmail.com>

and for patch 3: Acked-and-tested-by: Lad, Prabhakar
<prabhakar.csengg at gmail.com>

Thanks,
--Prabhakar lad

> ---
>  drivers/cpufreq/acpi-cpufreq.c       |  9 +++---
>  drivers/cpufreq/arm_big_little.c     | 16 +++++------
>  drivers/cpufreq/cpufreq_stats.c      | 24 ++++++----------
>  drivers/cpufreq/dbx500-cpufreq.c     |  8 ++----
>  drivers/cpufreq/elanfreq.c           |  9 +++---
>  drivers/cpufreq/exynos-cpufreq.c     | 11 ++++---
>  drivers/cpufreq/exynos5440-cpufreq.c | 30 +++++++++----------
>  drivers/cpufreq/freq_table.c         | 56 ++++++++++++++++--------------------
>  drivers/cpufreq/longhaul.c           | 11 ++++---
>  drivers/cpufreq/pasemi-cpufreq.c     | 10 +++----
>  drivers/cpufreq/powernow-k6.c        | 14 ++++-----
>  drivers/cpufreq/ppc_cbe_cpufreq.c    |  9 +++---
>  drivers/cpufreq/s3c2416-cpufreq.c    | 40 +++++++++++---------------
>  drivers/cpufreq/s3c64xx-cpufreq.c    | 15 ++++------
>  14 files changed, 116 insertions(+), 146 deletions(-)
>
> diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
> index 000e4e0..b0c18ed 100644
> --- a/drivers/cpufreq/acpi-cpufreq.c
> +++ b/drivers/cpufreq/acpi-cpufreq.c
> @@ -213,7 +213,7 @@ static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
>
>  static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
>  {
> -       int i;
> +       struct cpufreq_frequency_table *pos;
>         struct acpi_processor_performance *perf;
>
>         if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
> @@ -223,10 +223,9 @@ static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
>
>         perf = data->acpi_data;
>
> -       for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
> -               if (msr == perf->states[data->freq_table[i].driver_data].status)
> -                       return data->freq_table[i].frequency;
> -       }
> +       cpufreq_for_each_entry(pos, data->freq_table)
> +               if (msr == perf->states[pos->driver_data].status)
> +                       return pos->frequency;
>         return data->freq_table[0].frequency;
>  }
>
> diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
> index bad2ed3..1f4d4e3 100644
> --- a/drivers/cpufreq/arm_big_little.c
> +++ b/drivers/cpufreq/arm_big_little.c
> @@ -226,22 +226,22 @@ static inline u32 get_table_count(struct cpufreq_frequency_table *table)
>  /* get the minimum frequency in the cpufreq_frequency_table */
>  static inline u32 get_table_min(struct cpufreq_frequency_table *table)
>  {
> -       int i;
> +       struct cpufreq_frequency_table *pos;
>         uint32_t min_freq = ~0;
> -       for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++)
> -               if (table[i].frequency < min_freq)
> -                       min_freq = table[i].frequency;
> +       cpufreq_for_each_entry(pos, table)
> +               if (pos->frequency < min_freq)
> +                       min_freq = pos->frequency;
>         return min_freq;
>  }
>
>  /* get the maximum frequency in the cpufreq_frequency_table */
>  static inline u32 get_table_max(struct cpufreq_frequency_table *table)
>  {
> -       int i;
> +       struct cpufreq_frequency_table *pos;
>         uint32_t max_freq = 0;
> -       for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++)
> -               if (table[i].frequency > max_freq)
> -                       max_freq = table[i].frequency;
> +       cpufreq_for_each_entry(pos, table)
> +               if (pos->frequency > max_freq)
> +                       max_freq = pos->frequency;
>         return max_freq;
>  }
>
> diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
> index ecaaebf..0cd9b4d 100644
> --- a/drivers/cpufreq/cpufreq_stats.c
> +++ b/drivers/cpufreq/cpufreq_stats.c
> @@ -182,11 +182,11 @@ static void cpufreq_stats_free_table(unsigned int cpu)
>
>  static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
>  {
> -       unsigned int i, j, count = 0, ret = 0;
> +       unsigned int i, count = 0, ret = 0;
>         struct cpufreq_stats *stat;
>         unsigned int alloc_size;
>         unsigned int cpu = policy->cpu;
> -       struct cpufreq_frequency_table *table;
> +       struct cpufreq_frequency_table *pos, *table;
>
>         table = cpufreq_frequency_get_table(cpu);
>         if (unlikely(!table))
> @@ -205,12 +205,8 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
>         stat->cpu = cpu;
>         per_cpu(cpufreq_stats_table, cpu) = stat;
>
> -       for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
> -               unsigned int freq = table[i].frequency;
> -               if (freq == CPUFREQ_ENTRY_INVALID)
> -                       continue;
> +       cpufreq_for_each_valid_entry(pos, table)
>                 count++;
> -       }
>
>         alloc_size = count * sizeof(int) + count * sizeof(u64);
>
> @@ -228,15 +224,11 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
>  #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
>         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;
> -       }
> -       stat->state_num = j;
> +       i = 0;
> +       cpufreq_for_each_valid_entry(pos, table)
> +               if (freq_table_get_index(stat, pos->frequency) == -1)
> +                       stat->freq_table[i++] = pos->frequency;
> +       stat->state_num = i;
>         spin_lock(&cpufreq_stats_lock);
>         stat->last_time = get_jiffies_64();
>         stat->last_index = freq_table_get_index(stat, policy->cur);
> diff --git a/drivers/cpufreq/dbx500-cpufreq.c b/drivers/cpufreq/dbx500-cpufreq.c
> index 412a78b..4bebc1b 100644
> --- a/drivers/cpufreq/dbx500-cpufreq.c
> +++ b/drivers/cpufreq/dbx500-cpufreq.c
> @@ -45,7 +45,7 @@ static struct cpufreq_driver dbx500_cpufreq_driver = {
>
>  static int dbx500_cpufreq_probe(struct platform_device *pdev)
>  {
> -       int i = 0;
> +       struct cpufreq_frequency_table *pos;
>
>         freq_table = dev_get_platdata(&pdev->dev);
>         if (!freq_table) {
> @@ -60,10 +60,8 @@ static int dbx500_cpufreq_probe(struct platform_device *pdev)
>         }
>
>         pr_info("dbx500-cpufreq: Available frequencies:\n");
> -       while (freq_table[i].frequency != CPUFREQ_TABLE_END) {
> -               pr_info("  %d Mhz\n", freq_table[i].frequency/1000);
> -               i++;
> -       }
> +       cpufreq_for_each_entry(pos, freq_table)
> +               pr_info("  %d Mhz\n", pos->frequency / 1000);
>
>         return cpufreq_register_driver(&dbx500_cpufreq_driver);
>  }
> diff --git a/drivers/cpufreq/elanfreq.c b/drivers/cpufreq/elanfreq.c
> index 7f5d2a6..1c06e78 100644
> --- a/drivers/cpufreq/elanfreq.c
> +++ b/drivers/cpufreq/elanfreq.c
> @@ -147,7 +147,7 @@ static int elanfreq_target(struct cpufreq_policy *policy,
>  static int elanfreq_cpu_init(struct cpufreq_policy *policy)
>  {
>         struct cpuinfo_x86 *c = &cpu_data(0);
> -       unsigned int i;
> +       struct cpufreq_frequency_table *pos;
>
>         /* capability check */
>         if ((c->x86_vendor != X86_VENDOR_AMD) ||
> @@ -159,10 +159,9 @@ static int elanfreq_cpu_init(struct cpufreq_policy *policy)
>                 max_freq = elanfreq_get_cpu_frequency(0);
>
>         /* table init */
> -       for (i = 0; (elanfreq_table[i].frequency != CPUFREQ_TABLE_END); i++) {
> -               if (elanfreq_table[i].frequency > max_freq)
> -                       elanfreq_table[i].frequency = CPUFREQ_ENTRY_INVALID;
> -       }
> +       cpufreq_for_each_entry(pos, elanfreq_table)
> +               if (pos->frequency > max_freq)
> +                       pos->frequency = CPUFREQ_ENTRY_INVALID;
>
>         /* cpuinfo and default policy values */
>         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
> diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
> index f99cfe2..9c13255 100644
> --- a/drivers/cpufreq/exynos-cpufreq.c
> +++ b/drivers/cpufreq/exynos-cpufreq.c
> @@ -29,17 +29,16 @@ static unsigned int locking_frequency;
>  static int exynos_cpufreq_get_index(unsigned int freq)
>  {
>         struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
> -       int index;
> +       struct cpufreq_frequency_table *pos;
>
> -       for (index = 0;
> -               freq_table[index].frequency != CPUFREQ_TABLE_END; index++)
> -               if (freq_table[index].frequency == freq)
> +       cpufreq_for_each_entry(pos, freq_table)
> +               if (pos->frequency == freq)
>                         break;
>
> -       if (freq_table[index].frequency == CPUFREQ_TABLE_END)
> +       if (pos->frequency == CPUFREQ_TABLE_END)
>                 return -EINVAL;
>
> -       return index;
> +       return pos - freq_table;
>  }
>
>  static int exynos_cpufreq_scale(unsigned int target_freq)
> diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c
> index a6b8214..f33f25b 100644
> --- a/drivers/cpufreq/exynos5440-cpufreq.c
> +++ b/drivers/cpufreq/exynos5440-cpufreq.c
> @@ -114,25 +114,23 @@ static struct cpufreq_freqs freqs;
>
>  static int init_div_table(void)
>  {
> -       struct cpufreq_frequency_table *freq_tbl = dvfs_info->freq_table;
> +       struct cpufreq_frequency_table *pos, *freq_tbl = dvfs_info->freq_table;
>         unsigned int tmp, clk_div, ema_div, freq, volt_id;
> -       int i = 0;
>         struct dev_pm_opp *opp;
>
>         rcu_read_lock();
> -       for (i = 0; freq_tbl[i].frequency != CPUFREQ_TABLE_END; i++) {
> -
> +       cpufreq_for_each_entry(pos, freq_tbl) {
>                 opp = dev_pm_opp_find_freq_exact(dvfs_info->dev,
> -                                       freq_tbl[i].frequency * 1000, true);
> +                                       pos->frequency * 1000, true);
>                 if (IS_ERR(opp)) {
>                         rcu_read_unlock();
>                         dev_err(dvfs_info->dev,
>                                 "failed to find valid OPP for %u KHZ\n",
> -                               freq_tbl[i].frequency);
> +                               pos->frequency);
>                         return PTR_ERR(opp);
>                 }
>
> -               freq = freq_tbl[i].frequency / 1000; /* In MHZ */
> +               freq = pos->frequency / 1000; /* In MHZ */
>                 clk_div = ((freq / CPU_DIV_FREQ_MAX) & P0_7_CPUCLKDEV_MASK)
>                                         << P0_7_CPUCLKDEV_SHIFT;
>                 clk_div |= ((freq / CPU_ATB_FREQ_MAX) & P0_7_ATBCLKDEV_MASK)
> @@ -157,7 +155,8 @@ static int init_div_table(void)
>                 tmp = (clk_div | ema_div | (volt_id << P0_7_VDD_SHIFT)
>                         | ((freq / FREQ_UNIT) << P0_7_FREQ_SHIFT));
>
> -               __raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 * i);
> +               __raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 *
> +                                               (pos - freq_tbl));
>         }
>
>         rcu_read_unlock();
> @@ -166,8 +165,9 @@ static int init_div_table(void)
>
>  static void exynos_enable_dvfs(unsigned int cur_frequency)
>  {
> -       unsigned int tmp, i, cpu;
> +       unsigned int tmp, cpu;
>         struct cpufreq_frequency_table *freq_table = dvfs_info->freq_table;
> +       struct cpufreq_frequency_table *pos;
>         /* Disable DVFS */
>         __raw_writel(0, dvfs_info->base + XMU_DVFS_CTRL);
>
> @@ -182,15 +182,15 @@ static void exynos_enable_dvfs(unsigned int cur_frequency)
>          __raw_writel(tmp, dvfs_info->base + XMU_PMUIRQEN);
>
>         /* Set initial performance index */
> -       for (i = 0; freq_table[i].frequency != CPUFREQ_TABLE_END; i++)
> -               if (freq_table[i].frequency == cur_frequency)
> +       cpufreq_for_each_entry(pos, freq_table)
> +               if (pos->frequency == cur_frequency)
>                         break;
>
> -       if (freq_table[i].frequency == CPUFREQ_TABLE_END) {
> +       if (pos->frequency == CPUFREQ_TABLE_END) {
>                 dev_crit(dvfs_info->dev, "Boot up frequency not supported\n");
>                 /* Assign the highest frequency */
> -               i = 0;
> -               cur_frequency = freq_table[i].frequency;
> +               pos = freq_table;
> +               cur_frequency = pos->frequency;
>         }
>
>         dev_info(dvfs_info->dev, "Setting dvfs initial frequency = %uKHZ",
> @@ -199,7 +199,7 @@ static void exynos_enable_dvfs(unsigned int cur_frequency)
>         for (cpu = 0; cpu < CONFIG_NR_CPUS; cpu++) {
>                 tmp = __raw_readl(dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4);
>                 tmp &= ~(P_VALUE_MASK << C0_3_PSTATE_NEW_SHIFT);
> -               tmp |= (i << C0_3_PSTATE_NEW_SHIFT);
> +               tmp |= ((pos - freq_table) << C0_3_PSTATE_NEW_SHIFT);
>                 __raw_writel(tmp, dvfs_info->base + XMU_C0_3_PSTATE + cpu * 4);
>         }
>
> diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
> index 08e7bbc..8e518c6 100644
> --- a/drivers/cpufreq/freq_table.c
> +++ b/drivers/cpufreq/freq_table.c
> @@ -21,22 +21,19 @@
>  int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
>                                     struct cpufreq_frequency_table *table)
>  {
> +       struct cpufreq_frequency_table *pos;
>         unsigned int min_freq = ~0;
>         unsigned int max_freq = 0;
> -       unsigned int i;
> +       unsigned int freq;
>
> -       for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
> -               unsigned int freq = table[i].frequency;
> -               if (freq == CPUFREQ_ENTRY_INVALID) {
> -                       pr_debug("table entry %u is invalid, skipping\n", i);
> +       cpufreq_for_each_valid_entry(pos, table) {
> +               freq = pos->frequency;
>
> -                       continue;
> -               }
>                 if (!cpufreq_boost_enabled()
> -                   && (table[i].flags & CPUFREQ_BOOST_FREQ))
> +                   && (pos->flags & CPUFREQ_BOOST_FREQ))
>                         continue;
>
> -               pr_debug("table entry %u: %u kHz\n", i, freq);
> +               pr_debug("table entry %u: %u kHz\n", (int)(pos - table), freq);
>                 if (freq < min_freq)
>                         min_freq = freq;
>                 if (freq > max_freq)
> @@ -57,7 +54,8 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
>  int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
>                                    struct cpufreq_frequency_table *table)
>  {
> -       unsigned int next_larger = ~0, freq, i = 0;
> +       struct cpufreq_frequency_table *pos;
> +       unsigned int freq, next_larger = ~0;
>         bool found = false;
>
>         pr_debug("request for verification of policy (%u - %u kHz) for cpu %u\n",
> @@ -65,9 +63,9 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
>
>         cpufreq_verify_within_cpu_limits(policy);
>
> -       for (; freq = table[i].frequency, freq != CPUFREQ_TABLE_END; i++) {
> -               if (freq == CPUFREQ_ENTRY_INVALID)
> -                       continue;
> +       cpufreq_for_each_valid_entry(pos, table) {
> +               freq = pos->frequency;
> +
>                 if ((freq >= policy->min) && (freq <= policy->max)) {
>                         found = true;
>                         break;
> @@ -118,7 +116,8 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
>                 .driver_data = ~0,
>                 .frequency = 0,
>         };
> -       unsigned int i;
> +       struct cpufreq_frequency_table *pos;
> +       unsigned int freq, i = 0;
>
>         pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
>                                         target_freq, relation, policy->cpu);
> @@ -132,10 +131,10 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
>                 break;
>         }
>
> -       for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
> -               unsigned int freq = table[i].frequency;
> -               if (freq == CPUFREQ_ENTRY_INVALID)
> -                       continue;
> +       cpufreq_for_each_valid_entry(pos, table) {
> +               freq = pos->frequency;
> +
> +               i = pos - table;
>                 if ((freq < policy->min) || (freq > policy->max))
>                         continue;
>                 switch (relation) {
> @@ -184,8 +183,7 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
>  int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
>                 unsigned int freq)
>  {
> -       struct cpufreq_frequency_table *table;
> -       int i;
> +       struct cpufreq_frequency_table *pos, *table;
>
>         table = cpufreq_frequency_get_table(policy->cpu);
>         if (unlikely(!table)) {
> @@ -193,10 +191,9 @@ int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
>                 return -ENOENT;
>         }
>
> -       for (i = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) {
> -               if (table[i].frequency == freq)
> -                       return i;
> -       }
> +       cpufreq_for_each_valid_entry(pos, table)
> +               if (pos->frequency == freq)
> +                       return pos - table;
>
>         return -EINVAL;
>  }
> @@ -208,16 +205,13 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_index);
>  static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
>                                     bool show_boost)
>  {
> -       unsigned int i = 0;
>         ssize_t count = 0;
> -       struct cpufreq_frequency_table *table = policy->freq_table;
> +       struct cpufreq_frequency_table *pos, *table = policy->freq_table;
>
>         if (!table)
>                 return -ENODEV;
>
> -       for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
> -               if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
> -                       continue;
> +       cpufreq_for_each_valid_entry(pos, table) {
>                 /*
>                  * show_boost = true and driver_data = BOOST freq
>                  * display BOOST freqs
> @@ -229,10 +223,10 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
>                  * show_boost = false and driver_data != BOOST freq
>                  * display NON BOOST freqs
>                  */
> -               if (show_boost ^ (table[i].flags & CPUFREQ_BOOST_FREQ))
> +               if (show_boost ^ (pos->flags & CPUFREQ_BOOST_FREQ))
>                         continue;
>
> -               count += sprintf(&buf[count], "%d ", table[i].frequency);
> +               count += sprintf(&buf[count], "%d ", pos->frequency);
>         }
>         count += sprintf(&buf[count], "\n");
>
> diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c
> index d00e5d1..f4024d4 100644
> --- a/drivers/cpufreq/longhaul.c
> +++ b/drivers/cpufreq/longhaul.c
> @@ -528,6 +528,7 @@ static int longhaul_get_ranges(void)
>
>  static void longhaul_setup_voltagescaling(void)
>  {
> +       struct cpufreq_frequency_table *freq_pos;
>         union msr_longhaul longhaul;
>         struct mV_pos minvid, maxvid, vid;
>         unsigned int j, speed, pos, kHz_step, numvscales;
> @@ -606,18 +607,16 @@ static void longhaul_setup_voltagescaling(void)
>         /* Calculate kHz for one voltage step */
>         kHz_step = (highest_speed - min_vid_speed) / numvscales;
>
> -       j = 0;
> -       while (longhaul_table[j].frequency != CPUFREQ_TABLE_END) {
> -               speed = longhaul_table[j].frequency;
> +       cpufreq_for_each_entry(freq_pos, longhaul_table) {
> +               speed = freq_pos->frequency;
>                 if (speed > min_vid_speed)
>                         pos = (speed - min_vid_speed) / kHz_step + minvid.pos;
>                 else
>                         pos = minvid.pos;
> -               longhaul_table[j].driver_data |= mV_vrm_table[pos] << 8;
> +               freq_pos->driver_data |= mV_vrm_table[pos] << 8;
>                 vid = vrm_mV_table[mV_vrm_table[pos]];
>                 printk(KERN_INFO PFX "f: %d kHz, index: %d, vid: %d mV\n",
> -                               speed, j, vid.mV);
> -               j++;
> +                       speed, (int)(freq_pos - longhaul_table), vid.mV);
>         }
>
>         can_scale_voltage = 1;
> diff --git a/drivers/cpufreq/pasemi-cpufreq.c b/drivers/cpufreq/pasemi-cpufreq.c
> index 84c84b5..35dd4d7 100644
> --- a/drivers/cpufreq/pasemi-cpufreq.c
> +++ b/drivers/cpufreq/pasemi-cpufreq.c
> @@ -136,9 +136,10 @@ void restore_astate(int cpu)
>
>  static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
>  {
> +       struct cpufreq_frequency_table *pos;
>         const u32 *max_freqp;
>         u32 max_freq;
> -       int i, cur_astate;
> +       int cur_astate;
>         struct resource res;
>         struct device_node *cpu, *dn;
>         int err = -ENODEV;
> @@ -197,10 +198,9 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
>         pr_debug("initializing frequency table\n");
>
>         /* initialize frequency table */
> -       for (i=0; pas_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
> -               pas_freqs[i].frequency =
> -                       get_astate_freq(pas_freqs[i].driver_data) * 100000;
> -               pr_debug("%d: %d\n", i, pas_freqs[i].frequency);
> +       cpufreq_for_each_entry(pos, pas_freqs) {
> +               pos->frequency = get_astate_freq(pos->driver_data) * 100000;
> +               pr_debug("%d: %d\n", (int)(pos - pas_freqs), pos->frequency);
>         }
>
>         cur_astate = get_cur_astate(policy->cpu);
> diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c
> index 49f120e..a133236 100644
> --- a/drivers/cpufreq/powernow-k6.c
> +++ b/drivers/cpufreq/powernow-k6.c
> @@ -159,6 +159,7 @@ static int powernow_k6_target(struct cpufreq_policy *policy,
>
>  static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
>  {
> +       struct cpufreq_frequency_table *pos;
>         unsigned int i, f;
>         unsigned khz;
>
> @@ -176,12 +177,11 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
>                 }
>         }
>         if (param_max_multiplier) {
> -               for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
> -                       if (clock_ratio[i].driver_data == param_max_multiplier) {
> +               cpufreq_for_each_entry(pos, clock_ratio)
> +                       if (pos->driver_data == param_max_multiplier) {
>                                 max_multiplier = param_max_multiplier;
>                                 goto have_max_multiplier;
>                         }
> -               }
>                 printk(KERN_ERR "powernow-k6: invalid max_multiplier parameter, valid parameters 20, 30, 35, 40, 45, 50, 55, 60\n");
>                 return -EINVAL;
>         }
> @@ -209,12 +209,12 @@ have_busfreq:
>         param_busfreq = busfreq * 10;
>
>         /* table init */
> -       for (i = 0; (clock_ratio[i].frequency != CPUFREQ_TABLE_END); i++) {
> -               f = clock_ratio[i].driver_data;
> +       cpufreq_for_each_entry(pos, clock_ratio) {
> +               f = pos->driver_data;
>                 if (f > max_multiplier)
> -                       clock_ratio[i].frequency = CPUFREQ_ENTRY_INVALID;
> +                       pos->frequency = CPUFREQ_ENTRY_INVALID;
>                 else
> -                       clock_ratio[i].frequency = busfreq * f;
> +                       pos->frequency = busfreq * f;
>         }
>
>         /* cpuinfo and default policy values */
> diff --git a/drivers/cpufreq/ppc_cbe_cpufreq.c b/drivers/cpufreq/ppc_cbe_cpufreq.c
> index 5be8a48..5a4c5a6 100644
> --- a/drivers/cpufreq/ppc_cbe_cpufreq.c
> +++ b/drivers/cpufreq/ppc_cbe_cpufreq.c
> @@ -67,9 +67,10 @@ static int set_pmode(unsigned int cpu, unsigned int slow_mode)
>
>  static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
>  {
> +       struct cpufreq_frequency_table *pos;
>         const u32 *max_freqp;
>         u32 max_freq;
> -       int i, cur_pmode;
> +       int cur_pmode;
>         struct device_node *cpu;
>
>         cpu = of_get_cpu_node(policy->cpu, NULL);
> @@ -102,9 +103,9 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
>         pr_debug("initializing frequency table\n");
>
>         /* initialize frequency table */
> -       for (i=0; cbe_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
> -               cbe_freqs[i].frequency = max_freq / cbe_freqs[i].driver_data;
> -               pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
> +       cpufreq_for_each_entry(pos, cbe_freqs) {
> +               pos->frequency = max_freq / pos->driver_data;
> +               pr_debug("%d: %d\n", (int)(pos - cbe_freqs), pos->frequency);
>         }
>
>         /* if DEBUG is enabled set_pmode() measures the latency
> diff --git a/drivers/cpufreq/s3c2416-cpufreq.c b/drivers/cpufreq/s3c2416-cpufreq.c
> index 4626f90..2fd53ea 100644
> --- a/drivers/cpufreq/s3c2416-cpufreq.c
> +++ b/drivers/cpufreq/s3c2416-cpufreq.c
> @@ -266,7 +266,7 @@ out:
>  static void __init s3c2416_cpufreq_cfg_regulator(struct s3c2416_data *s3c_freq)
>  {
>         int count, v, i, found;
> -       struct cpufreq_frequency_table *freq;
> +       struct cpufreq_frequency_table *pos;
>         struct s3c2416_dvfs *dvfs;
>
>         count = regulator_count_voltages(s3c_freq->vddarm);
> @@ -275,12 +275,11 @@ static void __init s3c2416_cpufreq_cfg_regulator(struct s3c2416_data *s3c_freq)
>                 return;
>         }
>
> -       freq = s3c_freq->freq_table;
> -       while (count > 0 && freq->frequency != CPUFREQ_TABLE_END) {
> -               if (freq->frequency == CPUFREQ_ENTRY_INVALID)
> -                       continue;
> +       if (!count)
> +               goto out;
>
> -               dvfs = &s3c2416_dvfs_table[freq->driver_data];
> +       cpufreq_for_each_valid_entry(pos, s3c_freq->freq_table) {
> +               dvfs = &s3c2416_dvfs_table[pos->driver_data];
>                 found = 0;
>
>                 /* Check only the min-voltage, more is always ok on S3C2416 */
> @@ -292,13 +291,12 @@ static void __init s3c2416_cpufreq_cfg_regulator(struct s3c2416_data *s3c_freq)
>
>                 if (!found) {
>                         pr_debug("cpufreq: %dkHz unsupported by regulator\n",
> -                                freq->frequency);
> -                       freq->frequency = CPUFREQ_ENTRY_INVALID;
> +                                pos->frequency);
> +                       pos->frequency = CPUFREQ_ENTRY_INVALID;
>                 }
> -
> -               freq++;
>         }
>
> +out:
>         /* Guessed */
>         s3c_freq->regulator_latency = 1 * 1000 * 1000;
>  }
> @@ -338,7 +336,7 @@ static struct notifier_block s3c2416_cpufreq_reboot_notifier = {
>  static int __init s3c2416_cpufreq_driver_init(struct cpufreq_policy *policy)
>  {
>         struct s3c2416_data *s3c_freq = &s3c2416_cpufreq;
> -       struct cpufreq_frequency_table *freq;
> +       struct cpufreq_frequency_table *pos;
>         struct clk *msysclk;
>         unsigned long rate;
>         int ret;
> @@ -427,31 +425,27 @@ static int __init s3c2416_cpufreq_driver_init(struct cpufreq_policy *policy)
>         s3c_freq->regulator_latency = 0;
>  #endif
>
> -       freq = s3c_freq->freq_table;
> -       while (freq->frequency != CPUFREQ_TABLE_END) {
> +       cpufreq_for_each_entry(pos, s3c_freq->freq_table) {
>                 /* special handling for dvs mode */
> -               if (freq->driver_data == 0) {
> +               if (pos->driver_data == 0) {
>                         if (!s3c_freq->hclk) {
>                                 pr_debug("cpufreq: %dkHz unsupported as it would need unavailable dvs mode\n",
> -                                        freq->frequency);
> -                               freq->frequency = CPUFREQ_ENTRY_INVALID;
> +                                        pos->frequency);
> +                               pos->frequency = CPUFREQ_ENTRY_INVALID;
>                         } else {
> -                               freq++;
>                                 continue;
>                         }
>                 }
>
>                 /* Check for frequencies we can generate */
>                 rate = clk_round_rate(s3c_freq->armdiv,
> -                                     freq->frequency * 1000);
> +                                     pos->frequency * 1000);
>                 rate /= 1000;
> -               if (rate != freq->frequency) {
> +               if (rate != pos->frequency) {
>                         pr_debug("cpufreq: %dkHz unsupported by clock (clk_round_rate return %lu)\n",
> -                                freq->frequency, rate);
> -                       freq->frequency = CPUFREQ_ENTRY_INVALID;
> +                               pos->frequency, rate);
> +                       pos->frequency = CPUFREQ_ENTRY_INVALID;
>                 }
> -
> -               freq++;
>         }
>
>         /* Datasheet says PLL stabalisation time must be at least 300us,
> diff --git a/drivers/cpufreq/s3c64xx-cpufreq.c b/drivers/cpufreq/s3c64xx-cpufreq.c
> index ff7d3ec..176e84c 100644
> --- a/drivers/cpufreq/s3c64xx-cpufreq.c
> +++ b/drivers/cpufreq/s3c64xx-cpufreq.c
> @@ -118,11 +118,10 @@ static void __init s3c64xx_cpufreq_config_regulator(void)
>                 pr_err("Unable to check supported voltages\n");
>         }
>
> -       freq = s3c64xx_freq_table;
> -       while (count > 0 && freq->frequency != CPUFREQ_TABLE_END) {
> -               if (freq->frequency == CPUFREQ_ENTRY_INVALID)
> -                       continue;
> +       if (!count)
> +               goto out;
>
> +       cpufreq_for_each_valid_entry(freq, s3c64xx_freq_table) {
>                 dvfs = &s3c64xx_dvfs_table[freq->driver_data];
>                 found = 0;
>
> @@ -137,10 +136,9 @@ static void __init s3c64xx_cpufreq_config_regulator(void)
>                                  freq->frequency);
>                         freq->frequency = CPUFREQ_ENTRY_INVALID;
>                 }
> -
> -               freq++;
>         }
>
> +out:
>         /* Guess based on having to do an I2C/SPI write; in future we
>          * will be able to query the regulator performance here. */
>         regulator_latency = 1 * 1000 * 1000;
> @@ -179,8 +177,7 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
>         }
>  #endif
>
> -       freq = s3c64xx_freq_table;
> -       while (freq->frequency != CPUFREQ_TABLE_END) {
> +       cpufreq_for_each_entry(freq, s3c64xx_freq_table) {
>                 unsigned long r;
>
>                 /* Check for frequencies we can generate */
> @@ -196,8 +193,6 @@ static int s3c64xx_cpufreq_driver_init(struct cpufreq_policy *policy)
>                  * frequency is the maximum we can support. */
>                 if (!vddarm && freq->frequency > clk_get_rate(policy->clk) / 1000)
>                         freq->frequency = CPUFREQ_ENTRY_INVALID;
> -
> -               freq++;
>         }
>
>         /* Datasheet says PLL stabalisation time (if we were to use
> --
> 1.9.0



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