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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2015-01-06 16:39:05 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-01-23 23:06:44 +0100 |
| commit | 2aba0c1bae564a59fc38c407abf7985f9e347cc4 (patch) | |
| tree | 187084e0c331a68ca46754f57c868764032401f7 /drivers/cpufreq | |
| parent | cpufreq: stats: don't check for freq table while freeing stats (diff) | |
| download | linux-2aba0c1bae564a59fc38c407abf7985f9e347cc4.tar.xz linux-2aba0c1bae564a59fc38c407abf7985f9e347cc4.zip | |
cpufreq: stats: pass 'stat' to cpufreq_stats_update()
It is better to pass a struct cpufreq_stats pointer to cpufreq_stats_update()
instead of a CPU number, because that's all it needs.
Even if we pass a cpu number to cpufreq_stats_update(), it reads the per-cpu
variable to get 'stats' out of it. So we are doing these operations
unnecessarily:
- First getting the cpu number to pass to cpufreq_stats_update(), stat->cpu.
- And then getting stats from the cpu, per_cpu(cpufreq_stats_table, cpu).
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq_stats.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index e9d68420b876..6c234f548601 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -33,13 +33,11 @@ struct cpufreq_stats { static DEFINE_PER_CPU(struct cpufreq_stats *, cpufreq_stats_table); -static int cpufreq_stats_update(unsigned int cpu) +static int cpufreq_stats_update(struct cpufreq_stats *stat) { - struct cpufreq_stats *stat; unsigned long long cur_time = get_jiffies_64(); spin_lock(&cpufreq_stats_lock); - stat = per_cpu(cpufreq_stats_table, cpu); if (stat->time_in_state) stat->time_in_state[stat->last_index] += cur_time - stat->last_time; @@ -64,7 +62,7 @@ static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf) struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu); if (!stat) return 0; - cpufreq_stats_update(stat->cpu); + cpufreq_stats_update(stat); for (i = 0; i < stat->state_num; i++) { len += sprintf(buf + len, "%u %llu\n", stat->freq_table[i], (unsigned long long) @@ -82,7 +80,7 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf) struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu); if (!stat) return 0; - cpufreq_stats_update(stat->cpu); + cpufreq_stats_update(stat); len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n"); len += snprintf(buf + len, PAGE_SIZE - len, " : "); for (i = 0; i < stat->state_num; i++) { @@ -307,7 +305,7 @@ static int cpufreq_stat_notifier_trans(struct notifier_block *nb, if (old_index == -1 || new_index == -1) return 0; - cpufreq_stats_update(freq->cpu); + cpufreq_stats_update(stat); if (old_index == new_index) return 0; |