diff options
| author | MyungJoo Ham <myungjoo.ham@samsung.com> | 2015-08-18 13:45:49 +0900 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-05-27 15:28:39 +0800 |
| commit | 7bb8598989d0da2a0000ed08eb68e937e5c4bf28 (patch) | |
| tree | a109be6f919bee88648a122e7dfa0274af71933e | |
| parent | 8a1e69518bdfe7edb7aafda59a5d873074afd054 (diff) | |
PM / devfreq: comments for get_dev_status usage updated
With the introduction of devfreq_update_stats(), governors
are not recommended to use get_dev_status() directly.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
(cherry picked from commit d54cdf3fc91aae3780433471d15d73413a845bc0)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
| -rw-r--r-- | include/linux/devfreq.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index 70a1c60ddda4..68030e22af35 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -65,7 +65,10 @@ struct devfreq_dev_status { * The "flags" parameter's possible values are * explained above with "DEVFREQ_FLAG_*" macros. * @get_dev_status: The device should provide the current performance - * status to devfreq, which is used by governors. + * status to devfreq. Governors are recommended not to + * use this directly. Instead, governors are recommended + * to use devfreq_update_stats() along with + * devfreq.last_status. * @get_cur_freq: The device should provide the current frequency * at which it is operating. * @exit: An optional callback that is called when devfreq @@ -208,6 +211,10 @@ extern void devm_devfreq_unregister_opp_notifier(struct device *dev, /** * devfreq_update_stats() - update the last_status pointer in struct devfreq * @df: the devfreq instance whose status needs updating + * + * Governors are recommended to use this function along with last_status, + * which allows other entities to reuse the last_status without affecting + * the values fetched later by governors. */ static inline int devfreq_update_stats(struct devfreq *df) { |