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cpufreq: governor: Clean up load-related computations

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Clean up some load-related computations in dbs_check_cpu() and
cpufreq_governor_start() to get rid of unnecessary operations and
type casts and make the code easier to read.

No functional changes.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2016-02-16 00:58:47 +01:00
parent 679b8fe43a
commit 57eb832f90
1 changed files with 10 additions and 14 deletions
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24
drivers/cpufreq/cpufreq_governor.c
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@ -186,16 +186,15 @@ void dbs_check_cpu(struct cpufreq_policy *policy)
io_busy = od_tuners->io_is_busy;
cur_idle_time = get_cpu_idle_time(j, &cur_wall_time, io_busy);
wall_time = (unsigned int)
(cur_wall_time - j_cdbs->prev_cpu_wall);
wall_time = cur_wall_time - j_cdbs->prev_cpu_wall;
j_cdbs->prev_cpu_wall = cur_wall_time;
if (cur_idle_time < j_cdbs->prev_cpu_idle)
cur_idle_time = j_cdbs->prev_cpu_idle;
idle_time = (unsigned int)
(cur_idle_time - j_cdbs->prev_cpu_idle);
j_cdbs->prev_cpu_idle = cur_idle_time;
if (cur_idle_time <= j_cdbs->prev_cpu_idle) {
idle_time = 0;
} else {
idle_time = cur_idle_time - j_cdbs->prev_cpu_idle;
j_cdbs->prev_cpu_idle = cur_idle_time;
}
if (ignore_nice) {
u64 cur_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
@ -562,13 +561,10 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy)
struct cpu_dbs_info *j_cdbs = gov->get_cpu_cdbs(j);
unsigned int prev_load;
j_cdbs->prev_cpu_idle =
get_cpu_idle_time(j, &j_cdbs->prev_cpu_wall, io_busy);
j_cdbs->prev_cpu_idle = get_cpu_idle_time(j, &j_cdbs->prev_cpu_wall, io_busy);
prev_load = (unsigned int)(j_cdbs->prev_cpu_wall -
j_cdbs->prev_cpu_idle);
j_cdbs->prev_load = 100 * prev_load /
(unsigned int)j_cdbs->prev_cpu_wall;
prev_load = j_cdbs->prev_cpu_wall - j_cdbs->prev_cpu_idle;
j_cdbs->prev_load = 100 * prev_load / (unsigned int)j_cdbs->prev_cpu_wall;
if (ignore_nice)
j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];