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authorSteve Muckle <steve.muckle@linaro.org>2016-07-13 13:25:27 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-07-21 22:28:32 +0200
commit5b6667c76d39e325d3c05b1f7e40f8a0e4bd6681 (patch)
tree7a8384759382e0d91cd7db9d71684e98b153f2cf /drivers/cpufreq/acpi-cpufreq.c
parent5cbea46984d67f614c74c4401b54b9d681861e80 (diff)
downloadleg-kernel-5b6667c76d39e325d3c05b1f7e40f8a0e4bd6681.tar.gz
cpufreq: acpi-cpufreq: use cached frequency mapping when possible
A call to cpufreq_driver_resolve_freq will cache the mapping from the desired target frequency to the frequency table index. If there is a mapping for the desired target frequency then use it instead of looking up the mapping again. Signed-off-by: Steve Muckle <smuckle@linaro.org> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/acpi-cpufreq.c')
-rw-r--r--drivers/cpufreq/acpi-cpufreq.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 11c9a078e0fd..297e9128fe9f 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -473,7 +473,10 @@ unsigned int acpi_cpufreq_fast_switch(struct cpufreq_policy *policy,
/*
* Find the closest frequency above target_freq.
*/
- index = cpufreq_table_find_index_dl(policy, target_freq);
+ if (policy->cached_target_freq == target_freq)
+ index = policy->cached_resolved_idx;
+ else
+ index = cpufreq_table_find_index_dl(policy, target_freq);
entry = &policy->freq_table[index];
next_freq = entry->frequency;