@@ -341,6 +341,20 @@ static inline int em_pd_nr_perf_states(struct em_perf_domain *pd)
return pd->nr_perf_states;
}
+static inline struct em_perf_state *em_get_table(struct em_perf_domain *pd)
+{
+ struct em_perf_table __rcu *runtime_table;
+
+ rcu_read_lock();
+ runtime_table = rcu_dereference(pd->runtime_table);
+ return runtime_table->state;
+}
+
+static inline void em_put_table(void)
+{
+ rcu_read_unlock();
+}
+
#else
struct em_data_callback {};
#define EM_ADV_DATA_CB(_active_power_cb, _cost_cb) { }
@@ -387,6 +401,11 @@ int em_dev_update_perf_domain(struct device *dev,
{
return -EINVAL;
}
+static inline struct em_perf_state *em_get_table(struct em_perf_domain *pd)
+{
+ return NULL;
+}
+static inline void em_put_table(void) {}
#endif
#endif
To use the runtime modifiable EM table there is a need to use RCU read locking properly. Add helper functions for the device drivers and frameworks to make sure it's done properly. Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> --- include/linux/energy_model.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)