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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2026-05-22 07:19:09 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-05-22 19:41:24 +0300 |
| commit | 9801be8bef65dbcbc40c1a9c2f03d70ed67a5d30 (patch) | |
| tree | 7423c88d024a3680c10335ec526aa74d612657ee /include/linux | |
| parent | aa70232cc7431d517e0402d90c38e11b67414049 (diff) | |
| download | linux-9801be8bef65dbcbc40c1a9c2f03d70ed67a5d30.tar.xz | |
cpufreq: Avoid redundant target() calls for unchanged limits
Drivers setting CPUFREQ_NEED_UPDATE_LIMITS expect target() to be
invoked even if the target frequency remains unchanged, so they can
update their internal policy limits state.
Currently the core invokes target() unconditionally whenever the
requested frequency matches policy->cur for such drivers, even if
policy->min and policy->max haven't changed since the previous update.
Track pending policy limit updates explicitly and skip redundant
target() invocations when neither the target frequency nor the
effective limits changed.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Link: https://patch.msgid.link/d0107c364b709abca21acf88072220bc05478594.1779423281.git.viresh.kumar@linaro.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpufreq.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 4d4b4ed24b30..ae9d1ce4f49c 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -146,6 +146,9 @@ struct cpufreq_policy { /* Per policy boost supported flag. */ bool boost_supported; + /* Pending policy->min/max update for the driver */ + bool update_limits; + /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ unsigned int cached_target_freq; unsigned int cached_resolved_idx; |