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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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8
drivers/cpufreq/freq_table.c
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@@ -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;
}