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| author | MyungJoo Ham | 2015-08-18 06:45:49 +0200 |
|---|---|---|
| committer | MyungJoo Ham | 2015-09-11 07:23:29 +0200 |
| commit | d54cdf3fc91aae3780433471d15d73413a845bc0 (patch) | |
| tree | fa5ffcdf078ea528d4ee32afefed4c1da5dc4385 /include/linux/devfreq.h | |
| parent | PM / devfreq: drop comment about thermal setting max_freq (diff) | |
| download | kernel-qcow2-linux-d54cdf3fc91aae3780433471d15d73413a845bc0.tar.gz kernel-qcow2-linux-d54cdf3fc91aae3780433471d15d73413a845bc0.tar.xz kernel-qcow2-linux-d54cdf3fc91aae3780433471d15d73413a845bc0.zip | |
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>
Diffstat (limited to 'include/linux/devfreq.h')
| -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) { |