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cpufreq: Add and use cpufreq_for_each_{valid_,}entry_idx()

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Pointer subtraction is slow and tedious. Therefore, replace all instances
where cpufreq_for_each_{valid_,}entry loops contained such substractions
with an iteration macro providing an index to the frequency_table entry.

Suggested-by: Al Viro <viro@ZenIV.linux.org.uk>
Link: http://lkml.kernel.org/r/20180120020237.GM13338@ZenIV.linux.org.uk
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dominik Brodowski
2018-01-30 06:42:37 +01:00
committed by Rafael J. Wysocki
parent 70f6bf2a3b
commit ffd81dcfef
8 changed files with 100 additions and 63 deletions
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7
drivers/cpufreq/exynos5440-cpufreq.c
View File

@@ -115,10 +115,10 @@ static struct cpufreq_freqs freqs;
static int init_div_table(void)
{
struct cpufreq_frequency_table *pos, *freq_tbl = dvfs_info->freq_table;
unsigned int tmp, clk_div, ema_div, freq, volt_id;
unsigned int tmp, clk_div, ema_div, freq, volt_id, idx;
struct dev_pm_opp *opp;
cpufreq_for_each_entry(pos, freq_tbl) {
cpufreq_for_each_entry_idx(pos, freq_tbl, idx) {
opp = dev_pm_opp_find_freq_exact(dvfs_info->dev,
pos->frequency * 1000, true);
if (IS_ERR(opp)) {
@@ -154,8 +154,7 @@ 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 *
(pos - freq_tbl));
__raw_writel(tmp, dvfs_info->base + XMU_PMU_P0_7 + 4 * idx);
dev_pm_opp_put(opp);
}

8
drivers/cpufreq/freq_table.c
View File

@@ -143,10 +143,9 @@ int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
break;
}
cpufreq_for_each_valid_entry(pos, table) {
cpufreq_for_each_valid_entry_idx(pos, table, i) {
freq = pos->frequency;
i = pos - table;
if ((freq < policy->min) || (freq > policy->max))
continue;
if (freq == target_freq) {
@@ -211,15 +210,16 @@ int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
unsigned int freq)
{
struct cpufreq_frequency_table *pos, *table = policy->freq_table;
int idx;
if (unlikely(!table)) {
pr_debug("%s: Unable to find frequency table\n", __func__);
return -ENOENT;
}
cpufreq_for_each_valid_entry(pos, table)
cpufreq_for_each_valid_entry_idx(pos, table, idx)
if (pos->frequency == freq)
return pos - table;
return idx;
return -EINVAL;
}

4
drivers/cpufreq/longhaul.c
View File

@@ -600,7 +600,7 @@ static void longhaul_setup_voltagescaling(void)
/* Calculate kHz for one voltage step */
kHz_step = (highest_speed - min_vid_speed) / numvscales;
cpufreq_for_each_entry(freq_pos, longhaul_table) {
cpufreq_for_each_entry_idx(freq_pos, longhaul_table, j) {
speed = freq_pos->frequency;
if (speed > min_vid_speed)
pos = (speed - min_vid_speed) / kHz_step + minvid.pos;
@@ -609,7 +609,7 @@ static void longhaul_setup_voltagescaling(void)
freq_pos->driver_data |= mV_vrm_table[pos] << 8;
vid = vrm_mV_table[mV_vrm_table[pos]];
pr_info("f: %d kHz, index: %d, vid: %d mV\n",
speed, (int)(freq_pos - longhaul_table), vid.mV);
speed, j, vid.mV);
}
can_scale_voltage = 1;

6
drivers/cpufreq/pasemi-cpufreq.c
View File

@@ -139,7 +139,7 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
struct cpufreq_frequency_table *pos;
const u32 *max_freqp;
u32 max_freq;
int cur_astate;
int cur_astate, idx;
struct resource res;
struct device_node *cpu, *dn;
int err = -ENODEV;
@@ -198,9 +198,9 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
pr_debug("initializing frequency table\n");
/* initialize frequency table */
cpufreq_for_each_entry(pos, pas_freqs) {
cpufreq_for_each_entry_idx(pos, pas_freqs, idx) {
pos->frequency = get_astate_freq(pos->driver_data) * 100000;
pr_debug("%d: %d\n", (int)(pos - pas_freqs), pos->frequency);
pr_debug("%d: %d\n", idx, pos->frequency);
}
cur_astate = get_cur_astate(policy->cpu);